# Body Fat Calculator - LeanFuel — Protein & Macro Tracker

> Protein & Macro Tracker (iPhone/iPad app by Jakub Laszczyk.)

- Source: https://appshunter.io/ios/app/body-fat-calculator-leanfuel/id6761960180 (this page in markdown: same URL + `.md`)
- Developer: [Jakub Laszczyk](https://appshunter.io/developer/568719342)
- Category: Health & Fitness, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 20 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 23 more
- Released: 2026-04-14
- Data updated: 2026-06-08
- User reviews in markdown: https://appshunter.io/ios/app/body-fat-calculator-leanfuel/id6761960180/reviews.md

## What is Body Fat Calculator?

Most protein calculators use your total body weight — so at 220 lbs, they tell you to eat 220g of protein a day. That's wrong, and you know it.

LeanFuel uses the U.S. Navy Method to calculate your actual body fat percentage from simple tape measurements. Then it gives you a protein target based on your lean body mass — the muscle you actually need to fuel.

HOW IT WORKS
1. Enter your measurements (neck, waist, height, weight)
2. Get your body fat %, lean mass, and fat mass instantly
3. Receive a personalized daily protein target
4. Log your protein and hit your goal every day

SMART PROTEIN TARGETS
Your target adjusts based on your fitness goal and activity level:
- Build Muscle: higher protein to fuel muscle growth
- Lose Fat: extra protein to preserve lean mass in a deficit
- Maintain: moderate protein for steady body composition
- Recomp: optimized for simultaneous fat loss and muscle gain

TRACK YOUR BODY RECOMPOSITION
- Body fat % over time (watch it go down)
- Lean mass over time (watch it go up)
- Protein target history with each measurement
- Real body recomp data — not just the scale

DAILY PROTEIN LOGGING
- 100+ built-in foods with verified protein values
- Quick-log in one tap or add your own custom foods
- Track daily grams vs. your target
- Watch your protein ring fill up throughout the day

STAY MOTIVATED
- Earn XP for logging, hitting targets, and measuring
- Level up through 15 ranks from Beginner to Recomp Master
- Unlock 19 achievement badges for streaks and milestones
- Maintain daily log streaks and target streaks

BUILT FOR YOUR LIFESTYLE
- Beautiful dark mode design
- BMI calculator included
- Metric and imperial units
- 30 languages supported
- No account required — your nutrition data stays on your device

Try LeanFuel free for 7 days. Then continue with a weekly ($4.99/week) or yearly ($29.99/year) subscription to unlock unlimited measurements, full charts, and all features.

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LEGAL:
Privacy Policy: http://www.jakubl.com/privacy.html
Terms of Use (EULA): http://www.jakubl.com/terms.html

SUPPORT:
support@jakubl.com
X: @jakublaszczyk


## Version history (last 1 release)

### 1.0 — 2026-04-14

No release notes.

## More apps by Jakub Laszczyk

- [Color Shift Free](https://appshunter.io/ios/app/color-shift-free/id606341358)
- [KetoSnap: Keto Diet Tracker](https://appshunter.io/ios/app/ketosnap-keto-diet-tracker/id6758585273)
- [Plates: Gym & Workout Tracker](https://appshunter.io/ios/app/plates-gym-and-workout-tracker/id6758921527)
- [Mushroom Hunter: AI Identifier](https://appshunter.io/ios/app/mushroom-hunter-ai-identifier/id6759995302)
- [Fasting Timer: Nova Fast](https://appshunter.io/ios/app/fasting-timer-nova-fast/id6761011600)
- [UV Tracker & Vitamin D: RayDay](https://appshunter.io/ios/app/uv-tracker-and-vitamin-d-rayday/id6761286896)

All apps by Jakub Laszczyk: https://appshunter.io/developer/568719342

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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 2026-06-08.*