Bodyfat Calculator 3 vs Simple Fasting Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bodyfat Calculator 3
Easily estimate your body fat percentage using simple measurements like waist circumference and weight. The app provides lean and fat mass values, BMI, and categorizes your body fat level. It supports multiple calculation methods and unit systems.
- Body fat percentage calculation
- Lean and fat mass display
- BMI and Waist to Height Ratio
- Multiple calculation systems (RFM, YMCA, Army)
- Supports metric and imperial units
- Real-time result updates
- Multi-language support
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*Update - now includes the new Army body fat calculation method as an option, which was introduced in June 2023. If you want to lose weight or are trying to build muscle then you need an accurate and simple way to measure body fat percentage. With this app you simply need to measure your waist and weigh yourself - that’s it! No messing around with callipers and no need to use a tape measure around your thighs, neck, hip etc. Just the waist will do and along with your weight measurement and an accurate body fat measurement can be given. An overall body category is given based on body fat percentage. BMI is also shown for comparison. Features include: - Your lean mass and fat mass values are displayed so you can see how much of your body is actually fat - Metric, US Imperial and even British stone and pound systems all supported and can be easily switched - Choose from RFM, YMCA and Army body fat calculation systems. - Body fat percentage, Waist to Height Ratio WHR and BMI metrics displayed and all update in real time - Automatically updates results as you type! No need to press a 'calculate' button every time to see your results like with other body fat calculator apps - Very user friendly with intuitive controls - Choose from multiple app themes - Waist to Height Ratio (WHR) - BMI - Supports English, French, Chinese (中文) and Japanese languages - have fun inputting friends, family or even celebrity measurements to find out their body fat! - can convert between pounds and kilograms, cm and feet and inches as well as cm and inches. Disclaimer: This app provides estimates of BMI and body fat percentage, but they are not comprehensive measures of health or fitness. Always consult a healthcare professional for a complete health assessment.
Simple Fasting Tracker
Easily track your intermittent fasting journey with personalized schedules, goal setting, and progress monitoring. Syncs with Apple Watch and HealthKit for seamless data management. Offers detailed analytics to optimize your fasting.
- Quick fast logging
- Customizable fasting schedules
- Real-time progress tracking
- Track weight and body fat
- Personalized fasting analytics
- Apple Watch and HealthKit sync
- Widgets for quick access
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Fasting tracker – Easy, simple and intuitive. You can start and track your fasts within seconds. You can set personalised fasting and weight goals, create custom fasting schedules, and receive reminders to stay on track. Plus, you can track and optimize your fasting journey while monitoring weight, body fat percentage, waist circumference, and other key metrics. If you have an Apple Watch, you can start and end your fasts, view current fast progress and also view historic data right from your Watch. The data is automatically synced with iPhone and Health kit. Features: - Quick fast log - Customizable fasting schedules - Real-time progress tracking - Track weight, body fat percentage, waist circumference, BMI and more. - Set and monitor weight goals - Personalized fasting analytics - Reminders to keep you focused Apple Watch Compatible: Start, stop and track your fasts directly from the watch which auto-syncs with the phone and HealthKit. (Yes, we repeated the Apple Watch text - we worked very hard on the feature!) Widgets: Quick access to fasting status, progress, and monthly metrics. Compare: Compare fasting's effect on weight, body fat, waist circumference, and BMI. (AI powered analytics with a human touch) Apple HealthKit Compatible: Seamlessly sync your health data. Note: This app is for general tracking and not a health / diagnostic tool. Always consult a healthcare professional before starting any fasting regimen. For feedback, we love hearing from you: myfastingapptracker@gmail.com Privacy Policy & Terms of Use: https://fastingapp.wordpress.com/terms-of-use/ Website: https://fastingapp.wordpress.com/
Screenshots
Verdict
The clearest difference is review sentiment: Simple Fasting Tracker at 78% against Bodyfat Calculator 3's 25%. Simple Fasting Tracker also leads on rating (4.8 vs 3.9) and ratings volume (61 vs 7). Bodyfat Calculator 3's advantage is monetization model (free vs freemium) and iOS requirement (12.0 vs 15.0). On price, update cadence, ads and in-app purchases 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
Both are free to download. Bodyfat Calculator 3 sells 1 one-off in-app purchase and Simple Fasting Tracker sells 6 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Simple Fasting Tracker holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Simple Fasting Tracker has 61 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 25% of Bodyfat Calculator 3's written reviews are positive against 78% of Simple Fasting Tracker's.
Bodyfat Calculator 3 ships an update every 3 weeks, Simple Fasting Tracker every 2 weeks. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.
| Parameter | Bodyfat Calculator 3 | Simple Fasting Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (7 ratings) | 4.8 (61 ratings) — better |
| Positive reviews | 25.0% of reviews | 77.8% of reviews — better |
| Number of ratings | 7 | 61 — better |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 46 MB | 47 MB |
| Age rating | 4+ | 12+ |
| Developer | Simon Burgess | Mamta Shah |
Customer experience
Bodyfat Calculator 3
Simple Fasting Tracker
In-app purchases
Bodyfat Calculator 3
- Remove Ads$0.99
Simple Fasting Tracker
- Weekly- Intermittent fasting$4.997 Days
- Monthly - Intermittent fasting3 Days trial$9.991 Month
- Year Promo - Fasting Tracker$14.991 Year
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- Yearly - Intermittent Fasting1 Year trial$24.991 Year
- Yearly - Intermittent fasting3 Days trial$24.991 Year
- Lifetime - Fasting Tracker$49.99
Questions
Is Bodyfat Calculator 3 free?
Is Simple Fasting Tracker free?
Which has better reviews, Bodyfat Calculator 3 or Simple Fasting Tracker?
Do Bodyfat Calculator 3 or Simple Fasting Tracker have ads?
Which is updated more often, Bodyfat Calculator 3 or Simple Fasting Tracker?
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