Lean: The calorie tracker that knows your real burn

Hey Product Hunt, maker here. Lean started with a frustration: every calorie tracker we tried estimated metabolism with population formulas. Harris-Benedict dates from 1919, Mifflin-St Jeor from 1990. They only look at weight, height, age and sex. Two people with the same stats but completely different body compositions get the same calorie target. That is wrong by design, because lean mass burns calories and fat mass barely does. So we built Lean around one idea: measure the body instead of guessing it. 1. You take a single photo. The AI BodyScan estimates your body fat in about 5 seconds. 2. From your real lean mass, a patented proprietary model computes your BMR, recalculated continuously as your body changes. 3. Lean then tracks the full energy equation: TDEE = BMR + NEAT + EAT + TEF. 4. It is also the first app to model metabolic adaptation: after weeks of dieting your metabolism slows down, and Lean quantifies that slowdown instead of ignoring it. Logging stays effortless: snap a photo of your plate, scan a barcode, or search the database (USDA and Open Food Facts). What's new since our first launch: we just shipped Profile Analysis (paste a TikTok link to a public profile, get its full breakdown: body fat, metabolism, steps, training program and diet, then adapt it to your own profile in one tap), redesigned the whole interface, and went from 8 to 14 languages. We read everything. If you ever quit a tracker because the numbers felt off, we would love your honest take: what would make you trust a calorie target?

Lean

The calorie tracker that knows your real burn

The calorie tracker that knows your real burn

Lean

Previous Lean Launches

Previous Lean Launches