Weight, body fat, lean mass, and progress photos in one private timeline that shows the trend.
Stop guessing. Start knowing. Track what actually matters.
Know your genetic potential. Track lean muscle without the guesswork.
AI-powered background removal. Consistent angles. See real changes.
Navy method calculations. Apple Health sync. Done before your coffee cools.
Navy method auto-calculates body fat percentage from measurements
Weight automatically pulled from your Apple Watch or smart scale
AI removes background for perfect before/after comparisons
Fat-Free Mass Index
21.4
Body Fat
12.3%
↓ 0.5%
Weight
180 lbs
→ 0.0
Weekly Progress
+2.3%
Streak
45 days
See how we stack up against generic fitness apps
| Feature | LogYourBody | Others |
|---|---|---|
| FFMI Calculator | ||
| Progress Photo AI | ||
| Apple Health Sync | partial | |
| Trend Predictions | ||
| Privacy First | ||
| No Ads Ever | ||
| Expert Support | ||
| Offline Mode | partial |
Join thousands who've discovered smarter body composition tracking
"Finally, an app that tracks what actually matters for body composition. I recommend it to all my patients."
"The FFMI tracking helped me understand my genetic limits. Game changer for natural athletes."
"My clients love the progress photos feature. Seeing changes they miss in the mirror keeps them motivated."
Join thousands of athletes who've stopped guessing and started knowing. Download LogYourBody and see your true progress.
Download Free on App Store