SlimAI vs YAZIO: Comparing Calorie Tracking, Fasting, Recipes, and Progress
Short answer
SlimAI and YAZIO both cover calories, macros and fasting. YAZIO is the stronger fit for recipe-led meal planning and European food coverage. SlimAI is the stronger fit if you want six ways to log, ingredient-level editing of every AI estimate, gram-level macro targets, and a photo-based body fat estimate in the same app.
Some tracking apps start with meal plans and fasting schedules. SlimAI starts with the meal you are trying to log.
If you are comparing SlimAI vs YAZIO, you are likely looking for a calorie tracker that also supports fasting, macros, water, workouts, steps, recipes, and progress. SlimAI Calorie Tracker gives you calorie and fasting support, but it leads with food logging choice, custom calorie goals, meal review, and progress clarity.
YAZIO publicly positions itself around calorie counting, intermittent fasting, recipes, meal planning, and healthy routines. The difference is how you want to build the routine. SlimAI helps you log food in more ways and connect each entry with your goals, habits, activity, and progress.
SlimAI is also the first AI calorie tracker with a built-in AI body fat calculator (based on publicly available feature listings, July 2026): AI Body Assessment estimates your body fat percentage from two photos, so your progress view goes beyond a weight graph.
And because fasting, water, training, meals, and body scans all sit in one app, SlimAI can compare them against each other. AI Coach reads your logged week into a trajectory, a cause, and one action, Health Patterns surfaces one observed pattern a week — including your fasting days measured against your own non-fasting days — and a written report arrives every Monday.
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Quick Verdict: SlimAI vs YAZIO
When you compare SlimAI vs YAZIO, the real question is not whether both apps support calories and fasting. They do.
SlimAI is the stronger choice when you want more ways to log meals, review nutrition, and connect calories with habits, activity, and progress — including gram-level custom calorie and macro goals, real-time portion warnings before you exceed your day, ingredient-level control over every logged meal with each ingredient shown at its exact weight and editable, removable, or added from a searchable database, and per-meal calorie ranges that show which meals are still owed and which are optional. You can use Camera Scan, Gallery Upload, Voice to Log, Type to Add, Barcode Scanner, Food Database Search, Recent Foods, Saved Foods, Ingredient Editing, Serving Size Guidance, and Back-Date Logging.
Only SlimAI includes AI Body Assessment, a photo-based body fat estimate — the first of its kind in an AI calorie tracker.
Only SlimAI turns a fasting week into a finding. AI Coach gives you a smoothed weight trajectory, the meal and weekdays that drove your calories, a 0–100 weekly score, and one action per insight — free, with a written Monday report — while Health Patterns compares your fasting days against your own non-fasting days, training against rest, and lean mass across two body scans in SlimAI Pro.
YAZIO is the stronger choice when you want a calorie counter with fasting timers, meal planning, recipes, food ratings, and a long-established healthy eating ecosystem.
Choose SlimAI if you want a food logging system built around meal review and daily progress. Choose YAZIO if you want a guided fasting-and-meal-plan app.
SlimAI combines AI meal logging, body fat estimates, 6 fasting plans, utensil-based water tracking, and swap-based diet plans in one app at $7.99/month — competitors typically cover a subset.
Where SlimAI Comes Out Ahead
Across 28 points of comparison, SlimAI leads on 20, is comparable on 6, and YAZIO leads on 2. The differences below are the ones that change how your day actually goes.
A plan that keeps up with you
Log a weigh-in that is your latest reading, or change your goal, pace, activity level, body type, or cuisine, and SlimAI reruns the calculation behind your original plan — updating your daily calorie target, your protein, fat and carbohydrate grams, your per-meal budgets, your BMI, your diet plan (cleared and refetched against the new budget), your stats and coach, and your home-screen widgets in a single save. The new target is shown live while you edit, before it is written, and a manual macro split is preserved as a ratio and re-applied to the new total.
The camera that also reads you
AI Body Assessment estimates body fat percentage from two photos with regional fat distribution across six body regions, so progress means composition and not only a weight graph. Public YAZIO pages reference body metrics, but no photo-based body fat estimate is listed, as of July 2026. Results are estimates for fitness awareness, never measurements or medical advice.
Correct any estimate in about ten seconds
Every ingredient in a logged meal shows its exact weight and can be edited, removed, or added from a searchable database, and an in-app Sources & References screen explains how the numbers were produced. Nothing about your day has to be taken on faith.
Help at the table, not homework
SlimAI tells you what fraction of the plate in front of you fits your remaining calories, and gives breakfast, lunch, dinner, and snacks their own ranges with a live status. It is help at the table, not homework on Sunday.
One price, one tier
SlimAI Pro is $7.99/month or $29.99/year with a 3-day free trial, and it includes AI scanning, fasting plans, water, workouts, diet plans, and body fat estimates. YAZIO associates AI food tracking, meal planning, detailed nutrition data, and extended insights with YAZIO Pro, per public feature descriptions, as of July 2026.
Your fasting week, measured against your own non-fasting week
Health Patterns compares parts of your own log against each other and surfaces one observed pattern a week: fasting days versus non-fasting days, training versus rest, protein on training days, low-water days, late eating, planned versus improvised meals, and lean-mass change across two body scans. Each pattern names its sample size and is written as an observation, never a cause. Part of SlimAI Pro.
A weekly read, not just a longer chart
AI Coach fits a trend line through exponentially smoothed weight logs rather than subtracting one weigh-in from another, names the meal type and two weekdays that drove your calories, scores the week 0–100 across adherence, consistency, macro quality, and activity, and ends every insight in a button that opens the right screen prefilled. A written report follows every Monday, free for all users.
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SlimAI vs YAZIO: Feature-by-Feature Comparison
Each row names what both apps offer and who it favours. Rows where YAZIO leads are marked as clearly as the rows where SlimAI does.
| What you are comparing | YAZIO | SlimAI |
|---|---|---|
| AI logging | ||
| Main positioningA guided plan and a flexible log suit different people, and switching later costs you history.Comparable | YAZIOA calorie counter with fasting, recipes, and meal planning inside a guided healthy-eating ecosystem, per public feature descriptions, as of July 2026 — the more structured and plan-led of the two. | SlimAIAI-first logging built around meal review, editable estimates, and one connected daily picture of food, habits, and body composition. |
| AI food scanA scan that saves itself is a scan you will be arguing with all week.SlimAI advantage | YAZIOAI photo tracking is listed on official public pages, per public feature descriptions, as of July 2026, with AI food tracking described under YAZIO Pro. | SlimAICamera Scan and Gallery Upload with a review step before saving, so the estimate is a starting point you can correct rather than a verdict you inherit. |
| Voice loggingThe meals you cannot type in the moment are the ones you forget by evening.SlimAI advantage | YAZIOVoice food logging is not listed in the reviewed public YAZIO feature descriptions, as of July 2026. | SlimAIVoice to Log captures the meal out loud while your hands are busy cooking, commuting, or holding the plate, so portions and sauces land before memory blurs them. |
| Barcode scannerPackaged food is where a wrong guess costs you the most calories.Comparable | YAZIOBarcode scanning is listed on public YAZIO pages, per public feature descriptions, as of July 2026 — comparable coverage for packaged food. | SlimAIBarcode Scanner sits in the same logging sheet as photo, voice, and search, so packaged items join the same calorie and macro picture as everything else. |
| Manual food loggingSome meals you already know by heart, and typing them should take seconds.Comparable | YAZIOA food diary, manual food tracking, and a large searchable database are publicly listed, per public feature descriptions, as of July 2026 — a mature and familiar manual flow. | SlimAIType to Add, Food Database Search, Recent Foods, Saved Foods, and Back-Date Logging cover the meals you repeat and the day you forgot to fill in. |
| Nutrition depth | ||
| Macro trackingNutrition detail behind a higher tier is detail most people never actually see.SlimAI advantage | YAZIOCalories, macros, and nutritional values are publicly listed, per public feature descriptions, as of July 2026, with detailed nutrition data described under Pro. | SlimAIProtein, carbs, and fat on every meal, recipe, and daily total, with gram-level targets and Food Health Score on the same screen, so quantity and quality are read together. |
| Micronutrient visibilityHitting your calorie target while missing key nutrients still leaves you flat.SlimAI advantage | YAZIOFood ratings and nutritional value analysis are publicly listed, per public feature descriptions, as of July 2026, with detailed nutrition data described under Pro. | SlimAIMicronutrient visibility sits on the foods you log, beside macros and Food Health Score, rather than being reserved for a higher tier. |
| Recipes and cooking directions in-appHopping between a recipe tab and your diary is where logging quietly stops.SlimAI advantage | YAZIOYAZIO publicly lists 3,000+ recipes with cooking mode and preparation steps, per public feature descriptions, as of July 2026 — an excellent library, though it sits in a separate recipe section rather than on a logged food. | SlimAICooking time and numbered directions live on the food detail screen of the food you logged, so cooking and logging happen in the same place. |
| Recipe coverageIf you want to be told what to cook, library size is most of the product.YAZIO leads | YAZIOPublic listings describe 3,000+ curated recipes with cooking mode and grocery lists, per public feature descriptions, as of July 2026 — a larger and better organised recipe library than SlimAI offers today. | SlimAIRecipe support plus a 50K+ food item database, weighted toward the meals people log most rather than a browsing cookbook. |
| Food database coverageThe test is whether your meal gets logged correctly, not how many rows sit behind the search box.Comparable | YAZIOPublic listings describe 4M+ searchable food items, per public feature descriptions, as of July 2026. Row counts and distinct foods are not the same thing — brand spellings, plurals, language variants, and portion variants each take a row — but the breadth genuinely helps for obscure European branded products. | SlimAIA 50K+ curated database kept deliberately tight so the right entry is the first result, plus Recent Foods, Saved Foods, and custom entries — with four fallbacks when a food is genuinely missing: AI photo scan, voice, barcode, and printed nutrition label. A food does not have to exist in a list to be logged. |
| Goals & guidance | ||
| Custom calorie & macro goalsA goal someone else picked for you is the first thing you stop following.SlimAI advantage | YAZIOAdjustable calorie and nutrition goals appear in public feature descriptions, as of July 2026; gram-level macro goal control is not clearly confirmed. | SlimAISet your own daily calories plus gram-level protein, carb, and fat targets; the guided estimate is offered, never forced, so the number you track against is one you agree with. |
| Real-time portion guidanceFinding out you went over after dinner is too late to do anything about it.SlimAI advantage | YAZIONo real-time in-meal portion fraction guidance is listed in public YAZIO feature descriptions, as of July 2026. | SlimAIBefore you save, SlimAI suggests how much of the scanned plate fits your remaining day — a quarter, a half, or the full serving — and warns you at the table instead of at midnight. |
| Per-meal calorie ranges with statusHalf your calories left at 8pm is a planning problem, not a willpower problem.SlimAI advantage | YAZIOThe food diary is organised by meal and meal plans assign meals to the day, per public feature descriptions, as of July 2026; a live per-meal recommended calorie range with taken, not-taken, or optional status is not described. | SlimAIBreakfast, lunch, dinner, and snacks each carry a recommended range and a live Over Limit / Not taken / Need to Eat / Optional status, so you always know what the day still owes you. |
| Meal suggestions and plansPlanning a week of shopping is a different job from deciding what to eat right now.YAZIO leads | YAZIOMeal planning, custom meal plans, and grocery lists are publicly listed, per public feature descriptions, as of July 2026 — a more complete planning system than SlimAI offers, especially if you shop and cook to a weekly schedule. | SlimAIMeal Suggestions and Diet Plan Logging turn your remaining calories into a next meal, with no weekly plan to build or maintain. |
| Diet plan with healthy swapsBeing told to eat better helps less than being told what to eat instead.SlimAI advantage | YAZIOMeal planning and custom meal plans are publicly listed, per public feature descriptions, as of July 2026; a one-tap healthier-swap suggestion is not described. | SlimAIPersonalized meals matched to your taste and regional preferences, with one-tap Better Choice swaps and quick meals that replace a choice rather than only rating it. |
| Coaching & insights | ||
| Weekly coaching read from your own logA plan tells you what to do. A coach tells you whether it worked.SlimAI advantage | YAZIOVisual insights and extended insights under YAZIO Pro present trends over time, per public feature descriptions, as of July 2026; a weekly trajectory built from a smoothed weight trend with calorie attribution by meal and weekday, and one prefilled next action, are not described. | SlimAIAI Coach answers three questions a week — where your weight is heading, what drove it, and the one next action — from a smoothed weight trend, meal-type and weekday attribution, a win and watch pair, and a 0–100 weekly score, with every insight ending in a button that opens the right screen prefilled. |
| Written weekly reportA longer chart is not the same as being told what the week meant.SlimAI advantage | YAZIOLong-term trend insights are described under YAZIO Pro, per public feature descriptions, as of July 2026; a generated written weekly report with ranked insights and one recommendation is not described. | SlimAIA written report every Monday: calorie average against goal, days on target, best day, macros, weight change, body-fat change when a body scan exists, two to three ranked insights, and one recommendation. Free for all users, and a quiet week still gets one, framed as a fresh start. |
| Fasting compared against your own non-fasting daysFasting is worth measuring against your own baseline, not against a general claim.SlimAI advantage | YAZIOFasting timers, plans, and history are strong and well developed, per public feature descriptions, as of July 2026; an automated comparison of fasting days against non-fasting days in your own log is not described. | SlimAIHealth Patterns compares your fasting days with your own non-fasting days once at least three of each are logged, alongside eight other rules — training versus rest, protein on training days, low-water days, late eating, planned versus improvised meals, and lean-mass change across two body scans. Each states its sample size and reads as an observation, never a cause. Part of SlimAI Pro. |
| Plateau detection and target adjustmentA plan that stops working is the moment most people stop opening the app.SlimAI advantage | YAZIOGoals and plans can be adjusted at any time, per public feature descriptions, as of July 2026; automatic plateau detection with a confirmable, reversible calorie adjustment is not described. | SlimAIA plateau is called only when the weight trend has been flat for at least 14 days and adherence over that window was good. SlimAI then proposes one small change — a step down in calories or 2,000 extra daily steps — applying neither without confirmation, with a gender-aware calorie floor, a rate cap near 1% of bodyweight per week, suppression for any medical condition, and inline undo. Part of SlimAI Pro. |
| AI questions about a logged mealA recipe library cannot answer a question about the plate you already ate.SlimAI advantage | YAZIONo single-question AI answer scoped to an individual logged meal is described, per public feature descriptions, as of July 2026. | SlimAIAsk About Your Meal answers one question about one logged dish from its stored analysis, in your app language, with no conversation thread by design and a daily quota. It is the only generative-AI text surface in SlimAI and gives no medical advice. Part of SlimAI Pro. |
| Transparency & control | ||
| Ingredient-level breakdown you can editOne wrong ingredient inside an AI estimate quietly bends your whole day.SlimAI advantage | YAZIOCustom meals and recipes let you build entries from ingredients you choose, and recipes list their ingredients, per public feature descriptions, as of July 2026; an editable per-ingredient weight breakdown on an already-logged meal, with an add-missing-ingredient search, is not described. | SlimAIEvery ingredient shows its exact weight and can be edited, removed, or added from a searchable database, so a wrong AI estimate takes seconds to correct instead of skewing your totals. |
| Disclosed calculation methodIf you cannot see how a number was produced, you cannot tell when it is wrong.SlimAI advantage | YAZIOFood ratings are described as evaluating factors such as vitamins, minerals, sugar, salt, and fats, per public feature descriptions, as of July 2026; an in-app sources-and-references screen explaining how calorie and burn estimates are produced is not described. | SlimAIAn in-app Sources & References screen explains how calorie, portion, and burn estimates are produced, so a surprising number can be checked instead of simply believed. |
| Habits & wellness | ||
| AI body fat estimate (Body Assessment)The scale cannot tell you whether the weight you lost was fat or muscle.SlimAI advantage | YAZIOPublic YAZIO pages reference body metrics, but no photo-based body fat estimate is listed, per public feature descriptions, as of July 2026. | SlimAIAI Body Assessment estimates body fat percentage from two photos using peer-reviewed formulas (US Navy, RFM, CUN-BAE), with regional fat distribution and a tape-measure option; AI photo analysis is part of SlimAI Pro. Results are estimates for fitness awareness, shown as a likely range with a confidence rating — never measurements, diagnosis, or medical advice. |
| Intermittent fasting plansA fasting window only helps if what you eat inside it is tracked too.Comparable | YAZIOFasting timers and plans such as 16:8, 5:2, and 6:1 are publicly listed with adjustable windows, per public feature descriptions, as of July 2026 — one of the most developed fasting experiences in a calorie app, and a genuine match for SlimAI here. | SlimAISix selectable plans (14:10, 16:8, 20:4, 22:2 OMAD, 6:1, 5:2) with schedules that sit in the same app as your calories, water, steps, and body fat estimates. |
| Water trackingHydration is the easiest habit to log and the easiest one to quietly drop.SlimAI advantage | YAZIOA water tracker with reminders is listed on public YAZIO pages, per public feature descriptions, as of July 2026. | SlimAILog by the utensil you actually drink from — jug, bottle, mug, or glass with custom sizes — plus a daily goal and drink history, so hydration takes one tap instead of arithmetic. |
| Habit trackingWeight moves for reasons your food log alone can never explain.SlimAI advantage | YAZIOA water tracker with reminders, step and activity tracking, and fitness syncs are publicly listed, per public feature descriptions, as of July 2026, with automatic activity tracking described under Pro. | SlimAIWater, workouts, steps, calories burned, fasting, and progress read together on one daily view, so a heavy training day and a low-step day both explain themselves. |
| Pricing & access | ||
| PricingA tracker only pays off if you keep it long enough to see a trend.SlimAI advantage | YAZIOA free app with in-app purchases; YAZIO Pro is a subscription that public descriptions associate with AI food tracking, meal planning, detailed nutrition data, recipe access, and extended insights, per public feature descriptions, as of July 2026. | SlimAIFree to download. SlimAI Pro is $7.99/month or $29.99/year, and both plans include a 3-day free trial — one tier covering unlimited AI scans, body fat estimates, fasting, water, and diet plans. |
| Best user typeThe best tracker is the one still in your routine in month three.Comparable | YAZIOPeople who want fasting, recipes, grocery lists, and a guided weekly plan doing the thinking for them, per public feature descriptions, as of July 2026 — a strong fit if structure is what you are missing. | SlimAIPeople who want meal review, editable AI estimates, custom goals, and connected daily progress in one place. |
Comparison based on publicly available information as of July 2026. Competitor features and pricing may change — check their official sites for the latest.
Fasting and Calorie Tracking: Which Routine Feels Easier to Follow?
Fasting is easier to manage when it connects with your meals, calories, water, activity, and progress.
SlimAI includes fasting tracking inside the same routine where you log food, set calorie goals, review macros, add water, track workouts, monitor steps, and check progress. You can see how your fasting window affects the rest of your day instead of tracking fasting as a separate habit.
YAZIO gives fasting a strong role in its tracking experience. Its public pages describe fasting timers, adjustable fasting windows, and plans such as 16:8, 5:2, and 6:1. Its help center also says users can activate, adjust, or cancel a fast.
Fasting changes meal timing, but calories still shape the day. SlimAI connects fasting with Custom Calorie Goals, consumed calories, burned calories, remaining calories, macros, and progress history. This helps you see how your eating window affects your full daily intake. YAZIO connects fasting with calorie tracking and food diary use.
Hydration matters during fasting and regular tracking days. SlimAI includes water tracking beside meals, fasting, workouts, steps, macros, and progress. YAZIO public listings mention a water tracker with reminders, which supports users who want hydration prompts inside a guided health app.
Food Logging: Which App Gives You More Ways to Track?
Food logging breaks down when one method does not fit the meal.
SlimAI gives you multiple ways to log food: Camera Scan, Gallery Upload, Voice to Log, Type to Add, Barcode Scanner, Food Database Search, Recent Foods, Saved Foods, Ingredient Editing, Serving Size Guidance, and Back-Date Logging. You can start with the method that fits the moment, then review the entry before saving.
YAZIO public pages list AI photo tracking, manual tracking, barcode scanning, a food diary, a food database, custom meals, and recipe tools. That gives YAZIO strong coverage for users who like structured food logging and meal planning.
Photo logging helps when typing slows you down. SlimAI supports photo logging through Camera Scan and Gallery Upload. You can scan a meal or upload a saved image, then review the result before saving it. Ingredient Editing and Serving Size Guidance help you correct the entry when the first result does not match your plate. YAZIO public pages list AI photo tracking for calorie and nutrition information.
Voice logging helps when you are cooking, commuting, or logging from memory. SlimAI includes Voice to Log, so you can speak meal details instead of typing them. Voice logging was not listed in the reviewed public YAZIO feature descriptions. Choose SlimAI if voice input matters to your routine.
Search and barcode logging work best when the food is already identifiable. SlimAI supports Food Database Search, Type to Add, Barcode Scanner, Recent Foods, Saved Foods, and custom entries. YAZIO public pages list food diary tracking, barcode scanning, and more than 4M searchable food items.
Homemade food rarely matches one database item. SlimAI helps when your meal includes local ingredients, custom cooking methods, sauces, oils, or mixed portions. You can scan, speak, type, upload, search, edit ingredients, adjust serving size, and back-date missed entries. YAZIO works well for users who want food diary tracking, custom meals, and recipe tools.
Meal Plans, Recipes, and Food Guidance Compared
Recipe support is more useful when it connects with calories, macros, ingredients, and progress.
SlimAI supports Meal Suggestions, Diet Plan Logging, a 50K+ food item database, ingredient details, macros, Food Health Score, and recipe nutrition context. The two catalogs count different things: SlimAI offers a 50K+ food item database for logging and discovery, while YAZIO lists 3,000+ recipes.
YAZIO public pages list 3,000+ recipes, meal planning tools, grocery lists, cooking mode, food ratings, and Pro access to custom meal plans. That works for users who want guided meal structure and recipe discovery inside the app.
Food quality needs more context than calories alone. SlimAI includes Food Health Score, macro tracking, micronutrient visibility, recipe nutrition details, and progress insights. YAZIO public pages mention food ratings that evaluate factors like vitamins, minerals, sugar, salt, and fats.
Progress and Habit Tracking Beyond Meals
Tracking is easier to continue when food, movement, hydration, fasting, and progress stay connected.
SlimAI connects workouts, calories burned, steps, water, fasting, macros, and progress history inside the same tracking experience. You can review what changed across the day instead of checking each habit separately.
YAZIO publicly lists integrated step and activity tracking, water reminders, visual insights, fitness tracker syncs, and long-term trend insights through Pro. That gives YAZIO a strong habit-tracking layer for users who like guided healthy routines.
Movement changes how you understand calorie balance. SlimAI includes workout tracking, calories burned, and step tracking with health integration where available. YAZIO public pages mention step and activity tracking, automatic tracking, and fitness tracker syncs.
Progress should show patterns, not just daily totals. SlimAI gives you progress history, streaks, meal logs, workout logs, habit tracking, insights, and progress photos where available. YAZIO public pages mention visual insights, history, body metrics, and long-term trend insights through Pro.
SlimAI goes one step further on body progress: AI Body Assessment estimates your body fat percentage from two photos, with regional fat distribution across six body regions, so trends mean more than a weight graph. YAZIO public pages mention body metrics, but no photo-based body fat estimate is listed.
Turning a Fasting Week Into a Finding
Both apps will run a fasting window and count the calories inside it. The question neither a timer nor a chart answers is whether fasting is doing anything for you specifically.
SlimAI answers it by comparison. Health Patterns puts your fasting days next to your own non-fasting days once at least three of each exist, and does the same for training days against rest days, protein on training days, low-water days against normal ones, late eating, plan-based meals against improvised ones, and lean-mass change across two body scans. One pattern surfaces a week, chosen deterministically, and each one states the sample size it was built from.
The lean-mass rule is the one only a connected app can produce: a scale cannot distinguish fat lost from muscle lost, and the comparison is possible because SlimAI includes body composition. Every pattern is phrased as an observation in your own data rather than a cause, and no rule runs below its minimum sample.
On top of that, AI Coach reads the week into a trajectory, an attribution, one win and at most one thing to watch, and a single next action that opens the right screen prefilled, with a written report every Monday. The coach card, trajectory, attribution, weekly score, micro-lesson, and the Monday report are free; Health Patterns, Smart Food Swaps, Adaptive Calorie Goals, and Ask About Your Meal are part of SlimAI Pro.
Who Should Choose SlimAI?
Choose SlimAI if you want food logging to adapt to the meal.
SlimAI gives you Camera Scan, Gallery Upload, Voice to Log, Type to Add, Barcode Scanner, Food Database Search, Recent Foods, Saved Foods, Ingredient Editing, Serving Size Guidance, and Back-Date Logging.
SlimAI also fits users who want fasting, water, workouts, steps, macros, meal suggestions, recipes, and progress inside one daily routine.
Best fit: You want a YAZIO alternative built for meal review, calorie goal flexibility, nutrition clarity, and connected progress.
Who Might Choose YAZIO?
Choose YAZIO if you want a calorie counter with strong fasting, recipes, and meal-planning support.
YAZIO suits users who prefer food diary tracking, fasting timers, 3,000+ recipes, food ratings, grocery lists, cooking mode, fitness tracker syncs, and a guided healthy eating ecosystem.
YAZIO is a strong fit for users who want calorie tracking, fasting plans, and meal planning in one established app. SlimAI is a strong fit for users who want more ways to log food and connect each entry with goals, habits, and progress.
Switching from YAZIO to SlimAI
If you came to YAZIO for fasting and structured plans, SlimAI keeps both — and stops asking you which tier they live in.
Fasting comes across intact
SlimAI includes six fasting plans (14:10, 16:8, 20:4, 22:2 OMAD, 6:1, 5:2) with reminders for the window, so the routine you already follow keeps running.
Diet plans that swap instead of scold
Diet plans include one-tap Better Choice swaps and quick meals for keto, Mediterranean, paleo, vegan, and vegetarian eating, alongside regional food personalization.
One tier instead of a Pro decision
AI scanning, fasting, water, workouts, diet plans, and body fat estimates are all in SlimAI Pro. YAZIO associates AI food tracking, meal planning, detailed nutrition data, and extended insights with Pro, per public feature descriptions, as of July 2026.
Your YAZIO history stays in YAZIO
SlimAI does not import diary history from another app. Weight trend, streaks, and insights rebuild from your first log, and AI Body Assessment gives you a body-composition baseline on day one.
What SlimAI costs after the trial
$29.99 a year — under $3 a month — for one tier that covers AI scanning, body fat estimates, fasting, water, workouts, diet plans, and progress. Monthly is $7.99. Both start with a 3-day free trial and cancel from your store account.
Twelve months at the monthly price is $95.88, so yearly saves $65.89 (69% off). YAZIO pricing changes independently — check its current store listing before comparing.
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What the research says about tracking apps
Independent findings, not ours
Neither of these papers tested SlimAI or YAZIO. They describe the category both apps sit in, and they are the two things worth knowing before you pick either one.
Across 90 adults tracking food in an app for eight weeks, the people who completed the study logged on 70.2% of days and lost 2.19% of body weight, against 1.54% for the sample as a whole, which logged on about half of days. Frequency of logging explained 6.8% of the variance in weight change.
A meta-analysis of 14 validation studies covering 12 dietary-record apps found every app underestimated energy intake against its reference method, pooled at −202 kcal/day (95% CI −319 to −85). Where the app and the reference used the same food-composition table, the gap fell to −57 kcal/day (95% CI −116 to 2), so most of the error came from the database rather than the app.
FAQ
Still Wondering About SlimAI
Is SlimAI a YAZIO alternative?
Is SlimAI a YAZIO alternative?Yes. SlimAI Calorie Tracker is a YAZIO alternative for users who want AI food logging, voice logging, barcode scanning, Custom Calorie Goals, Macro Tracker, fasting, water, workouts, steps, meal suggestions, recipes, and progress insights. YAZIO remains a fit for users who want a calorie counter with fasting timers, recipes, meal planning, food ratings, and a guided healthy eating ecosystem.
Which app is better for fasting and calorie tracking?
Which app is better for fasting and calorie tracking?SlimAI is better for users who want fasting connected with food logging choice, Custom Calorie Goals, macros, water, workouts, steps, and progress. YAZIO is better for users who want fasting timers, fasting plans, meal planning, and recipe guidance inside a calorie tracker.
Does YAZIO require a subscription?
Does YAZIO require a subscription?YAZIO offers a free app with in-app purchases, and YAZIO Pro is available as a subscription. Based on public YAZIO Pro information, Pro adds features such as AI food tracking, future meal planning, smart food rating, detailed nutrition data, recipe database access, grocery lists, automatic activity tracking, extended insights, and more fasting options. SlimAI Calorie Tracker is free to download, with SlimAI Pro available for $7.99/month or $29.99/year.
Does SlimAI track food by photo?
Does SlimAI track food by photo?Yes. SlimAI tracks food by photo through Camera Scan and Gallery Upload. You can scan a meal or upload a saved food image, then review the entry before saving. SlimAI also supports voice, text, barcode, search, recent foods, saved foods, and back-date logging.
Does SlimAI or YAZIO estimate body fat percentage?
Does SlimAI or YAZIO estimate body fat percentage?SlimAI includes AI Body Assessment, a built-in AI body fat calculator that estimates body fat percentage from two photos using peer-reviewed formulas (US Navy, RFM, CUN-BAE), with regional fat distribution and a tape-measure option. AI photo analysis is part of SlimAI Pro, and results are always an estimate for fitness awareness, shown as a likely range with a confidence rating. Public YAZIO pages reference body metrics, but no photo-based body fat estimate is listed.
Does SlimAI track water and workouts?
Does SlimAI track water and workouts?Yes. SlimAI tracks water, workouts, steps, calories burned, fasting, meals, macros, and progress in one routine. This helps you understand how food, hydration, activity, and daily habits connect.
Does SlimAI or YAZIO have an AI coach?
Does SlimAI or YAZIO have an AI coach?SlimAI includes AI Coach, which reads your logged week and answers where your weight is heading, what drove it, and the single next action, with a button that opens the right screen prefilled and a written report every Monday. It is not a chatbot — every sentence comes from deterministic rules over your own numbers, so the same week always produces the same output. Public YAZIO pages describe visual insights and extended insights under YAZIO Pro, as of July 2026; a weekly trajectory with calorie attribution and one next action is not described.
Can SlimAI show whether fasting is working for me?
Can SlimAI show whether fasting is working for me?It can show what your own log says. Health Patterns compares your fasting days against your own non-fasting days once you have at least three of each, and reports the comparison as an observation with its sample size stated, never as a cause. Eight other rules cover training versus rest days, protein on training days, low-water days, late eating, planned versus improvised meals, and lean-mass change across two body scans. Health Patterns is part of SlimAI Pro. SlimAI provides tracking and pattern tools, not medical advice.
Which app is better for flexible weight loss?
Which app is better for flexible weight loss?SlimAI is better for users who want weight loss as one possible goal, not the frame around every meal. You can set calorie goals, log meals in different ways, track macros, follow fasting, add water, log workouts, monitor steps, and review progress. YAZIO is better for users who want calorie tracking with stronger emphasis on fasting plans, recipes, meal planning, and guided healthy eating.
Make the switch from YAZIO with AI Meal Logging.
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- 50K+ food items in the food database
- 100K+ downloads on iOS and Android
- 7 languages
- 4.8★ App Store · 4.6★ Google Play (as of August 23, 2026)
