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

Estimate body fat percentage without expensive scans.

The body fat calculator gives you a practical estimate using body measurements, helping you set more realistic calorie targets and physique goals.

  • Use tape-based measurements instead of guesswork.
  • Set better fat-loss or muscle-gain targets from a clearer baseline.
  • Pair your estimate with the strategy planner and TDEE tools.