MacroCodex (does not use AI), 10K+ users already.

Adaptive TDEE Tracker

Get personalized recommendations on when to lean bulk, cut, or recomp.

It helps people lose weight especially when they see how their TDEE (maintenance) calories changes with time.

It also helps people run precise surplus (necessary for lean bulking), to maximize muscle gain while minimizing fat gain.

The tracker estimates your real TDEE by analyzing your calorie intake alongside your weight trends over time.

It's a free app: https://macrocodex.app/

It all started as series of fitness guides (on lean bulk/cut/body recomposition): https://www.reddit.com/r/tirzepatidecompound/comments/1omfgx...

When people started sharing the guide, we thought about automating it all.