Lean

Lean computes your real daily burn from your actual body fat instead of population formulas from 1919 or 1990. One front-facing photo and the AI BodyScan estimates your body fat percentage in 5 seconds; a patented proprietary model then computes your BMR on your real lean mass. Lean then tracks the complete energy equation: TDEE = BMR + NEAT + EAT + TEF. Steps-based daily movement (NEAT), workouts (EAT) and the thermic effect of food (TEF) computed from your actual macros, each shown separately. Lean is also the first consumer app to model metabolic adaptation, the slowdown that builds up during a long diet. Logging stays fast: snap a photo of your plate (AI scan), scan a barcode, or search a 3M+ food database (USDA and Open Food Facts). A live calorie balance adapts your target through the day. 10,000+ users. 4.7/5 on the App Store, 4.5/5 on Google Play. 8 languages, iOS and Android.