BMI Calculator
BMI, body fat and weight tracking for Android — with the metrics that go beyond BMI and real growth percentiles for children and teens.
There was a BMI calculator of mine on the Play Store from 2013. It still had users, and it had aged badly. Rather than patch it I rewrote the whole thing in Kotlin and Compose and kept the listing.
The gap in the market was easy to see: the popular BMI apps are stuffed with ads and stop at BMI. This one has no ads, no tracking and no account, and it goes further than one number. Body Roundness Index, waist-to-height ratio, US Navy body fat, FFMI. For children and teenagers it does BMI-for-age percentiles and z-scores from the official CDC LMS tables, shipped as raw data and computed on the device.
The part I am happiest with is the goal system. It fits a smoothed trend through your weight history and tells you what your actual pace is, including when that pace is unhealthy. Plenty of apps will congratulate you for losing four kilos in a week. This one says something else.
The domain maths is unit-tested against the real CDC reference data, which matters when the output is a percentile a parent might worry about.
- BRI, waist-to-height ratio and body fat on top of classic BMI
- CDC and Kromeyer-Hauschild growth references for kids
- No ads, no tracking, no account — everything stays on the device
Interested in something similar?