# FatKit - Body Fat and Lean Body Mass Calculator > iPhone app to calculate body fat and lean body mass using various methods. (iPhone/iPad app by VAR TIM SOFTWARE S.R.L..) - Source: https://appshunter.io/ios/app/fatkit-body-fat-and-lean-body-mass-calculator/id1105969579 (this page in markdown: same URL + `.md`) - Developer: [VAR TIM SOFTWARE S.R.L.](https://appshunter.io/developer/1105969578) - Category: Health & Fitness, Medical - Price: $0.99 - Rating: 3.80/5 from 19 App Store ratings · 14 written reviews indexed - Age rating: 4+ - Requires: iOS 9.0 · 14 MB - Languages: American English - Released: 2016-05-18 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/fatkit-body-fat-and-lean-body-mass-calculator/id1105969579/reviews.md ## What is FatKit? FatKit for iPhone helps you calculate your Body Fat Percentage and Lean Body Mass. It connects to the Health app, imports relevant data and stores your results. You can choose from multiple methods of measurement, measure your body with a fat caliper and take more than one measurement on each location for accuracy. You can track your progress in the history graphs. Specifications: Profile: • You can connect with the Health app and FatKit automatically imports data from there • Choose the imperial or metric system • Set reminders so you won’t miss a measurement • Contact the team for every question or suggestion • Rate the app Measurements: • REQUIRE A FAT CALIPER! • Can be imported from the Health app if you choose so Methods of measurement: • Jackson / Pollock 3 • Jackson / Pollock 4 • Jackson / Pollock 7 • Durnin / Womersley • Parillo History: • Individual graphs for Body Fat Percentage and Lean Body Mass • Periods: 1 month, 3 months, 6 months, 1 year • Graphs are just a tap / swipe away • Requires connection to the Health app ## Key features - Body Fat Percentage calculation - Lean Body Mass calculation - Connects to Health app - Multiple measurement methods - Progress tracking with graphs - Imperial/Metric system support - Measurement reminders ## Recent user reviews (10 of 14) All indexed reviews: https://appshunter.io/ios/app/fatkit-body-fat-and-lean-body-mass-calculator/id1105969579/reviews.md ### 3/5 — It’s pretty good, but has limits *2022-05-01* Nice interface, good set-up with health. Offers multiple methods. You cannot edit the data, and it doesn’t show the data, only results. You cannot enter past data that you might have been tracking, say on a scrap of paper for the last four months… But it does what is says it does. ### 5/5 — Great! *2021-07-09* I like it, it’s easy to use. ### 2/5 — App appears abandoned *2021-01-01* Sent email to developer as wrong dates are appearing in log entries. Email bounced back as invalid. Id suggest you save your money and take a pass on this. ### 5/5 — Excellent app. Does exactly what it needs to. *2019-12-09* The one thing that might make an even better app if it could track more additional data such as body weight. But better to do one thing right than a whole bunch of things wrong. ### 2/5 — Limited Editing and Poor Instructions *2019-01-20* I like the clean interface but after purchasing and doing 3 measurements, one per week for 3 weeks, I’ve found this app is really lacking. The first time I went to use it I chose the three site measurement method and was astonished that there were no simple diagrams on where and how to do the folds. Instead were complex anatomy names for where to do the folds so I had switch to safari and google info. Second issue is you cannot edit entries. I made an error on one entry and wanted to correct it but that is not an option so I had to delete it and re-enter all of the data. Third issue is you cannot set or change dates of entries. I accidentally deleted my first entry and wanted to add it back but there is no date field so that’s gone on my graph. So I’m now looking for a better app that offers better instructions and editable data. ### 1/5 — Lost all historical data *2018-12-05* Love this app and have been using it for about 6 months. All of my historical data just disappeared. When I enter a new entry it doesn’t show in the history section. Please fix. ### 5/5 — Great app *2018-10-14* This app was worth the money. You can enter your caliber measurements and it will average three to give your reading. ### 1/5 — Useless crap *2018-07-06* Not recommending this. ### 2/5 — Doesn't Work For Me *2017-02-04* My healthkit has both Body Fat Percentage as well as Weight. I was hoping this app could fill in the data for lean body mass with these numbers available (Lean = weight - body fat * weight), but unfortunately it won't... Instead the app tells me it has no data... ### 5/5 — Well done. *2016-12-06* Not overly complicated and relatively easy to use. I like it and it helps to log and record your weekly progress. Maybe I have not figured it out yet, however, I don't see where you can go back and look at your individual measurements after you have entered them into the app. It's not necessary, but I'm interested to see what my exact measurements were rather than just the ultimate body fat percentage from week to week. Nice app so far. Thanks. ## Frequently asked questions about FatKit ### What is FatKit used for? FatKit is an iPhone application designed to help users calculate their Body Fat Percentage and Lean Body Mass. It supports various measurement methods and tracks progress over time. ### Does FatKit require any special equipment? Yes, FatKit requires a fat caliper to perform measurements. The app guides you through using it for accurate body composition analysis. ### Can FatKit sync with Apple Health? Yes, FatKit can connect with the Health app on your iPhone. It can import relevant data and store your measurement results within the Health app. ### What measurement methods does FatKit support? FatKit supports several established methods for calculating body fat, including Jackson/Pollock 3, 4, and 7, Durnin/Womersley, and Parillo. ### How does FatKit track progress? FatKit provides individual graphs for Body Fat Percentage and Lean Body Mass. You can view your progress over periods of 1 month, 3 months, 6 months, or 1 year. ### What is the price of FatKit? FatKit is a paid application priced at $0.99. There are no in-app purchases or subscriptions mentioned. ### What devices is FatKit compatible with? FatKit is designed for iPhone and iPod devices. It requires iOS 4+ and is available on the App Store. ### How often is FatKit updated? The latest version of FatKit is 1.1.1, last updated on September 15, 2016. The app was initially released on May 18, 2016. ## Version history (last 4 releases) ### 1.1.1 — 2016-09-15 This app has been updated by Apple to display the Apple Watch app icon. • iOS 10 support If you enjoy using FatKit, please leave a positive review on the App Store. This keeps us motivated and helps support further development of this app. ### 1.1 — 2016-07-05 • added dynamic shortcuts, so when you force touch the icon, you are able to select your last used measurement method • fixed a bug which caused the history graph to only show KGs • added social links in the profile page • added some more elegant error handling when deleting history entries • other small bug fixes If you enjoy using FatKit, please leave a positive review on the App Store. This keeps us motivated and helps support further development of this app. ### 1.0.1 — 2016-05-19 Improved Rate App functionality ### 1.0 — 2016-05-18 No release notes. ## Apps similar to FatKit | App | Rating | Price | Category | | --- | --- | --- | --- | | [Pursuit Health and Performance](https://appshunter.io/ios/app/pursuit-health-and-performance/id6471519451) | 4.9 (41) | Free | Health & Fitness | | [1RM Percentage Calculator](https://appshunter.io/ios/app/1rm-percentage-calculator/id6451496905) | 5.0 (3) | Free | Health & Fitness | | [Body Fat Calculator Pro](https://appshunter.io/ios/app/body-fat-calculator-pro/id1564112103) | 3.7 (18) | $0.99 | Health & Fitness | | [Cat Buddy Pro](https://appshunter.io/ios/app/cat-buddy-pro/id446066704) | 4.4 (5) | $0.99 | Health & Fitness | | [eaglefit® Caliper](https://appshunter.io/ios/app/eaglefit-caliper/id1245597582) | — | Free | Health & Fitness | | [CrossFit Petoskey](https://appshunter.io/ios/app/crossfit-petoskey/id6463616402) | — | Free | Health & Fitness | ## More apps by VAR TIM SOFTWARE S.R.L. - [Popshot: AI Photo Editor](https://appshunter.io/ios/app/popshot-ai-photo-editor/id6754027503) All apps by VAR TIM SOFTWARE S.R.L.: https://appshunter.io/developer/1105969578 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*