Comparison

FastTrackr vs Simple Calorie Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FastTrackr

This app helps users track intermittent fasting with personalized plans and an AI assistant. It offers features for logging meals, water, and weight, along with insights into ketosis and autophagy zones. Users can also access recipes and meal planning tools.

Highlights
  • Intermittent fasting timer with ketosis zones
  • AI assistant for personalized guidance
  • Meal logging with AI calorie estimation
  • Water and weight tracking
  • Recipe library and meal planning
  • Progress charts and streaks
Features
Read full description

FastTrackr is an intermittent fasting app and fasting tracker for weight loss, with Avo — a friendly AI assistant who lives in the app. Start a 16:8 or OMAD fast in one tap, watch the fasting timer move through ketosis and autophagy zones, and log meals, water and weight in one place. No account required to begin — until you sign in, nothing you track leaves your device. MEET AVO, YOUR AI ASSISTANT - An animated companion who greets you, reacts to what you log and celebrates milestones - Log water, weight, activity or mood, or start and end a fast from Avo — offline, no account - Ask Avo about your fasting and wellness: 3 free AI answers a day with a free account, unlimited on Premium - He reads your own fasting, food, activity and weight first — guidance, not generic tips SMART FASTING TRACKER - Popular plans: 12:12, 14:10, 16:8, 18:6, 20:4, OMAD and 5:2 - Live fasting timer with zones from fat burning to ketosis and autophagy - Reminders so you never miss the start or end of a fast - Full history, streaks and progress charts AI INSIGHTS (PREMIUM) - Personalized Day, Week and Month analysis of your tracking - An AI-recommended fasting plan matched to your body, goals and experience AI MEAL LOG AND NUTRITION - Snap a photo or describe a meal; AI identifies it and estimates calories and macros - Backed by USDA data: calories, protein, carbs, fat and fiber at a glance MEAL PLANNING AND RECIPES - Over 530 recipes with photos and full nutrition: 5 free per category, all with Premium - Build daily meal plans, or generate recipes and plans with AI - Save favourites to your recipe library WATER, WEIGHT, ACTIVITY, AND MOOD - Personalized daily water goal from your body and activity - Weight tracking with trends, goals and progress rings - Workouts with BMR-aware calorie burn estimates - Capture your mood and reflect in a fasting journal PERSONALIZED HEALTH - Automatic BMI, BMR and TDEE from your profile - Goals that adapt as you progress - Guidance cites its sources — WHO, NIH, NHS, Harvard and more STAY MOTIVATED - Join time-boxed challenges built on your real data - Over 170 achievements to unlock - 43 in-app articles on the science and the how-to of fasting APPLE HEALTH (PREMIUM) - Import workouts, weight and active energy into one place PRIVATE BY DESIGN - Local-first: your data lives on your device and stays there until you sign in - Sign in and it backs up to your own private account, synced across devices - Full-size meal photos never sync; only a small thumbnail does - Export a complete copy of everything you've tracked, anytime - No ads. No data selling. Ever. FASTTRACKR PREMIUM Unlock AI insights, unlimited Ask Avo, AI meal logging, AI recipes and meal plans, the full recipe library, Apple Health import, Month and Year charts, and unlimited history. - Monthly: 9.99 USD - Annual: 59.99 USD - New yearly subscribers get a 14-day free trial. Cancel anytime. Payment will be charged to your Apple Account at confirmation of purchase. Your subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription in your Apple Account settings after purchase. Any unused portion of a free trial is forfeited when you purchase a subscription. Privacy Policy: https://sites.google.com/view/fasttrackr/privacy-policy Terms of Use (EULA): https://sites.google.com/view/fasttrackr/terms-of-use Support: fasttrackr.support@newversion.studio FastTrackr is intended for users aged 16 and over. Health disclaimer: FastTrackr provides general wellness and lifestyle information only and is not a substitute for professional medical advice, diagnosis or treatment. Consult a qualified healthcare provider before starting any fasting, diet or exercise program, especially if you are pregnant, nursing, under 18, or have a medical condition.

About

Simple Calorie Tracker

This app uses AI to help you track your calorie and macro intake. It offers features like barcode scanning, food search, and weight tracking. It also syncs with health platforms and provides personalized insights based on your data.

Highlights
  • AI meal photo scan
  • Barcode scanning
  • Food database search
  • Manual macro logging
  • Weight tracking with trend line
  • Apple Health & Google Health sync
  • Home and Lock Screen widgets
Features
Read full description

Calvin is a simple calorie, macro, fitness, and health tracker that keeps the basics free. Track food, calories, macros, weight, workouts, steps, sleep, recovery, and health trends in one place — without ads or requiring an account. Barcode scanning and food search are free. Most calorie trackers moved them behind a subscription. Calvin does not. FREE, AND STAYING FREE • Barcode scanning for packaged foods • Food search with USDA Branded and Open Food Facts • Calorie, macro, protein, carb, fat, fiber, sugar, and sodium tracking • Fast manual logging, common foods, recents, usuals, one-tap repeat logging, and copy yesterday's log • Custom recipes • Weight tracking with a smoothed trend line and adaptive maintenance calories based on your real weight trend • Fitness tracking for workouts, steps, distance, and active time • Apple Health integration and automatic compatible smart-scale weigh-ins • Body fat and lean mass trends when available • Google Health connection • Sleep, HRV, resting heart rate, personal baselines, and a daily recovery score • Weekly and monthly recaps, plus year in review • Home Screen and Lock Screen widgets • Apple Watch app and complication • Siri, Shortcuts, and CSV export FAST FOOD LOGGING Start typing a food and Calvin surfaces foods you've logged before. One tap logs it again. The built-in pantry makes everyday staples like eggs, apples, rice, and chicken quick to add. CALORIES & MACROS, YOUR WAY Calories stay front and center while macros and nutrients are there when you want them. Choose which metrics appear throughout the app. Turn calorie numbers off for a simpler on-track-or-over view. FITNESS, WEIGHT & MAINTENANCE CALORIES Keep workouts and daily activity alongside nutrition. Track weight with a smoothed trend line, and let Calvin adapt your maintenance-calorie estimate over time based on your real weight trend. HEALTH & RECOVERY Bring together sleep, HRV, resting heart rate, breathing rate, activity, and other available health signals. Calvin compares supported metrics with your recent baseline. Your daily recovery score summarizes how you're doing and highlights the signals that changed. APPLE HEALTH & SMART SCALES Connect Apple Health to bring supported fitness and health data into Calvin. Compatible smart-scale weigh-ins can appear automatically, including body fat and lean mass when your scale provides them. Connections are optional. APPLE WATCH Check calories remaining, your chosen macros, and recovery from the Calvin Apple Watch app and complication. NO ACCOUNT NEEDED. NO ADS. Use Calvin without creating an account. Your food log lives on your device, not on a Calvin server. Connecting Apple or Google is optional and does not upload or restore your food log. WEEKLY, MONTHLY & YEARLY TRENDS See patterns across nutrition and health data with weekly and monthly recaps and a year in review. CALVIN PLUS — AI MEAL SCANNER Calvin Plus adds AI-powered meal photo scanning and deeper insights. Take a photo and Calvin identifies foods on your plate and estimates their nutrition. It can account for things a photo may miss, like cooking oil, and asks before keeping uncertain additions. Adjust portions, add a missing item, or make a correction without starting over. Monthly and annual plans are available in your local App Store currency with a 3-day free trial. Barcode scanning, food search, calorie and macro tracking, fitness, weight, health features, and the other core features above remain free. SIMPLE BY DESIGN Calvin helps you understand nutrition, fitness, weight, and health without turning every meal into homework. Track what matters. Ignore what doesn't. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://calvinhealth.com/privacy

Screenshots

FastTrackr4 screens
Simple Calorie Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: FastTrackr at none against Simple Calorie Tracker's 2. FastTrackr also leads on iOS requirement (16.0 vs 18.0). Simple Calorie Tracker's advantage is update cadence (every 2 days vs fortnightly). On price, rating, ratings volume and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple Calorie Tracker sells 2 in-app purchases, starting at $9.99 per month. FastTrackr asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for FastTrackr against 5.0 for Simple Calorie Tracker. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

FastTrackr ships an update fortnightly, Simple Calorie Tracker every 2 days. Both last shipped on October 31, 2026.

Scorecard3 real differences · 7 level
FastTrackr versus Simple Calorie Tracker: the parameters behind the verdict, then further details
ParameterFastTrackrSimple Calorie Tracker
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyFortnightlyEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS16.0 — better18.0
Further details — not scored
Size84 MB18 MB
Age rating17+12+
DeveloperNEW VERSION LIMITEDKevin Miguel Estrada Garcia

Customer experience

FastTrackr

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Simple Calorie Tracker

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

FastTrackr

No in-app purchases

2 purchases

Simple Calorie Tracker

Subscriptions2
  • Calvin Plus3 Days trial$9.991 Month
  • Calvin Plus Annual3 Days trial$49.991 Year

Questions

Is FastTrackr free?
FastTrackr is free to download, with no in-app purchases.
Is Simple Calorie Tracker free?
Simple Calorie Tracker is free to download, with in-app purchases available.
Which has better reviews, FastTrackr or Simple Calorie Tracker?
FastTrackr and Simple Calorie Tracker are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do FastTrackr or Simple Calorie Tracker have ads?
Neither FastTrackr nor Simple Calorie Tracker shows ads.
Which is updated more often, FastTrackr or Simple Calorie Tracker?
FastTrackr ships an update fortnightly, and Simple Calorie Tracker every 2 days. Most recently, FastTrackr was updated on October 31, 2026 and Simple Calorie Tracker on October 31, 2026.

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