Arete Codex
Free fitness tools. No personal data collected.

Android app is out

MacroCodex lets you track your TDEE, weight, calories, and macros from your phone.

Install the free MacroCodex Android app and keep your nutrition data moving with you, without paywalls or subscriptions.

Download on Google Play

Free Tool

Measure body size and muscularity with BMI and FFMI.

The BMI and FFMI calculator gives you quick body composition context, including how much lean mass you carry relative to your height.

  • Calculate BMI and Fat-Free Mass Index in one place.
  • Use FFMI to benchmark muscularity more usefully than scale weight alone.
  • Combine with body fat and ideal weight tools for better goal setting.