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Lean measures your body fat with one photo (AI BodyScan) and computes your real TDEE: BMR + NEAT + EAT + TEF, with metabolic adaptation modeled. NEW: paste a TikTok link to a public profile and get its full breakdown (body fat, metabolism, steps, training, diet), then adapt it to your own profile in one tap. Redesigned interface, now in 14 languages. Log meals by AI photo scan, barcode or database.
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?
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About Lean on Product Hunt
“The calorie tracker that knows your real burn”
Lean was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #158 on the daily leaderboard. Lean measures your body fat with one photo (AI BodyScan) and computes your real TDEE: BMR + NEAT + EAT + TEF, with metabolic adaptation modeled. NEW: paste a TikTok link to a public profile and get its full breakdown (body fat, metabolism, steps, training, diet), then adapt it to your own profile in one tap. Redesigned interface, now in 14 languages. Log meals by AI photo scan, barcode or database.
Lean was featured in Android (57.5k followers), Health & Fitness (83.1k followers), Artificial Intelligence (477.2k followers) and Nutrition (989 followers) on Product Hunt. Together, these topics include over 194k products, making this a competitive space to launch in.
Who hunted Lean?
Lean was hunted by Franck. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Lean stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Franck