# Lean: Body Fat & BMI Tracker — Cited body-fat calculator

> Cited body-fat calculator (iPhone/iPad app by fung ka wa.)

- Source: https://appshunter.io/ios/app/lean-body-fat-and-bmi-tracker/id6784176876 (this page in markdown: same URL + `.md`)
- Developer: [fung ka wa](https://appshunter.io/developer/6778859454)
- Category: Health & Fitness, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 21 MB
- Languages: American English
- Released: 2026-06-26
- Data updated: 2026-08-25
- User reviews in markdown: https://appshunter.io/ios/app/lean-body-fat-and-bmi-tracker/id6784176876/reviews.md

## What is Lean?

Most body-fat apps run on guesswork. Lean is the opposite — every number
comes from a published formula, cited on screen, so you can check the
source yourself. No account, and your numbers never leave your device.

WHAT LEAN CALCULATES

- Body fat % using the U.S. Navy circumference method (Hodgdon & Beckett, 1984)
- Lean body mass and fat mass in lb or kg
- BMI, with the standard category bands
- BMR using Mifflin-St Jeor (Am J Clin Nutr, 1990)
- TDEE across five activity levels
- Reference weight at your current lean mass

MEASURE, DON'T GUESS

The Navy method needs a tape measure and three numbers: waist at the
navel, neck, and — for women — hips at the widest point. No calipers,
no scale beyond your usual one, no lab visit. Enter your measurements
and every result updates at once.

TRACK CHANGE OVER TIME

Save a measurement and Lean keeps it. The Progress tab shows how body
fat, lean mass and weight have moved, so you can see whether a training
block or a calorie deficit is actually working.

EVERY FORMULA IS CITED

Tap "How this is calculated" on any result and Lean shows the formula
it used and the published source. Nothing is a black box, and nothing
is invented.

PRIVATE BY DESIGN

Lean has no account, no login, and no server. Your measurements are
stored on your device and are never uploaded. The app works fully
offline.

Lean is free and supported by advertising.


## Version history (last 2 releases)

### 3.0.1 — 2026-08-23

- iPad: the app now rotates freely in landscape, and content is width-
  capped so text stays readable on a large screen.
- Ads now sit in a fixed bar below the content on every tab, instead of
  overlaying it. Nothing is covered, on any screen size or text size.
- Fixed layout issues at the largest accessibility text sizes.
- Smaller fixes: cleaner number formatting, removed an unused dependency.

I also found and corrected inaccurate information in my own store materials: 
the description, privacy policy, and data safety disclosure referred to a 
$2.99 ad-removal purchase that this app does not offer, and stated that one 
screen was ad-free when it is not. Both have been corrected to describe the 
app accurately.

### 1.0 — 2026-06-26

No release notes.

## More apps by fung ka wa

- [九巴通 — 長者版 巴士到站](https://appshunter.io/ios/app/id6778859452)
- [香港天氣通 - 天氣預報 颱風路徑](https://appshunter.io/ios/app/id6779145047)
- [香港泊車王 - 即時車位 · 大車高度搵位](https://appshunter.io/ios/app/id6779557505)
- [鐵路通 — 香港港鐵輕鐵實時到站及車費](https://appshunter.io/ios/app/id6779618657)
- [World Clock 世界時鐘](https://appshunter.io/ios/app/world-clock/id6780769463)
- [Dividend Calculator: DRIP](https://appshunter.io/ios/app/dividend-calculator-drip/id6780795770)

All apps by fung ka wa: https://appshunter.io/developer/6778859454

## Related topics

[lean bodies consulting](https://appshunter.io/ios/topics/lean-bodies-consulting) · [body fat calculator percentage](https://appshunter.io/ios/topics/body-fat-calculator-percentage) · [body fat calculator](https://appshunter.io/ios/topics/body-fat-calculator)

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*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 2026-08-25.*