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

Set target body weights that match real physique outcomes.

This calculator helps you estimate plausible body-weight targets at different body fat percentages and muscularity levels instead of chasing arbitrary numbers on the scale.

  • Model target weights across multiple body fat levels.
  • Compare weight goals against different muscularity assumptions.
  • Build more realistic timelines for cutting, bulking, or recomp.