Ranked by what each app is genuinely best at, as of September 2026. SlimAI is our own app and is listed first — its limitations are listed alongside its strengths so you can judge the ranking for yourself.
SlimAI Calorie Tracker
Our appBest for: Matching YAZIO breadth with AI logging and body composition
SlimAI covers the same ground — calories, macros, fasting, water, diet plans — and changes the two things YAZIO users most often want changed. Logging happens by photo, voice, free text or search, with one AI photo scan a day free with no time limit, and every result editable at the ingredient level before it saves. And preferred diet is a real input rather than a label: keto, Mediterranean, paleo, vegan or vegetarian, combined with your favourite cuisine and region, shapes both your targets and what SlimAI suggests, with one-tap Better Choice swaps instead of a fixed plan.
Strengths
- Six intermittent fasting plans — 14:10, 16:8, 20:4, 22:2 OMAD, 6:1, 5:2 — with window reminders
- AI logging by photo, voice, text or search, with ingredient-level editing before anything saves
- One AI photo scan a day on the free tier, permanently — not a trial
- Preferred diet and regional cuisine shape targets and suggestions, not just a profile label
- Health Patterns compares your fasting days against your own non-fasting days, training against rest, and lean mass across two body scans
- AI Coach reads the week into a trajectory, a cause and one action, with a free written report every Monday
- AI Body Assessment — body fat percentage, fat and lean mass, regional distribution
- Pro at $29.99 a year — under $3 a month — below YAZIO's listed annual Pro price (dated figure in our YAZIO review)
Limitations
- Fixed day-by-day meal plans are not the model — SlimAI suggests against your targets rather than scripting the week
- Smaller recipe library than a plan-led app
- No diary import; Body Assessment is a fitness estimate for ages 18+, not a clinical measurement
See the full SlimAI vs YAZIO breakdown →Lifesum
Best for: Diet-led plans with food quality ratings
The closest match to YAZIO in philosophy: pick an eating style, follow plans and recipes built for it, and get a quality rating on what you log rather than only a count.
Strengths
- Strong diet-specific plans and recipes
- Quality ratings alongside calories
- Polished interface
Limitations
- Less granular macro control
- Fasting support is lighter
- No body composition measurement
MyFitnessPal
Best for: Database size and integrations
If the specific thing failing you in YAZIO is finding the food you eat, database size is the fix. Broader integrations too, at the cost of meal planning and fasting being less central — and barcode scanning moved behind Premium in 2022, which YAZIO still includes free.
Strengths
- Largest food and restaurant database
- Wide device and app integrations
- Macro tracking included
Limitations
- Search-driven logging is slow
- Barcode scanner and meal scan are Premium
- No meal planning focus, no body composition measurement
Compare SlimAI with MyFitnessPal point by point →Cronometer
Best for: Verified data and micronutrient depth
A different priority entirely: data quality over guidance. Choose it if you need to trust the numbers for a clinical or supervised reason. Its free tier is the most capable in the category for nutrient tracking; Gold pricing, with a date and source, is in our Cronometer review.
Strengths
- Curated, verified food entries
- Deep vitamin and mineral tracking
- Suited to medically-motivated tracking
Limitations
- Slow, detail-heavy logging
- No meal plans
- No body fat estimation
Compare SlimAI with Cronometer point by point →MacroFactor
Best for: Adaptive calorie targets from your own data
MacroFactor calculates your energy expenditure from your own logged intake and weight trend, then adjusts your targets each week. It is the most quantitative option here and is aimed at people who already understand macro periodisation. Nothing plan-led, nothing fasting-led — it is a targets app, and a rigorous one.
Strengths
- Adaptive expenditure calculation from your own data
- Weekly target adjustments without manual recalculation
- Strong macro-first design for coached training
Limitations
- No free tier at all
- Assumes real familiarity with macro tracking
- No fasting, no meal plans, no body composition
Compare SlimAI with MacroFactor point by point →Lose It!
Best for: Stripping back to a simple calorie budget
If YAZIO felt like more structure than you wanted, this removes almost all of it and leaves a calorie number and a way to log against it.
Strengths
- Very low learning curve
- Established database
- Photo logging available
Limitations
- No meal plans
- No fasting tracker
- Weight-only progress
Compare SlimAI with Lose It! point by point →Noom
Best for: A behaviour-change course with tracking attached
Noom sells daily psychology lessons, colour-coded food categories and human coaching, with a food diary underneath. Worth considering only if what you liked about YAZIO was being told what to do — Noom does that more, at a coaching-programme price.
Strengths
- Structured daily curriculum
- Human coaching available
- Colour-coded food guidance
Limitations
- Priced as a programme, not a tracker
- Logging is search-driven
- No fasting timer, no body composition measurement
Compare SlimAI with Noom point by point →Cal AI
Best for: Photo logging as the entire product
The narrowest option here. Worth considering only if logging speed is your single complaint and you are willing to give up fasting, water and planning to get it. Its listing states that scanning results require a subscription, so there is no functional free tier.
Strengths
- Fast photo-based estimation
- Minimal interface
Limitations
- No meal planning, fasting or water tracking of consequence
- Fewer correction paths when a scan is wrong
- Scanning results require a subscription
Compare SlimAI with Cal AI point by point →