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Last updated: February 13, 2026
DEXA wins on accuracy. FitCommit wins on cost, convenience, and tracking frequency. For most people who want to track body fat regularly without spending $75-150 per visit, FitCommit is the practical choice. Use DEXA for quarterly validation if you want clinical-grade precision.
Good accuracy
Gold standard accuracy
Uses computer vision AI to analyze three photos (front, side, back) and estimate body fat percentage, lean mass, and body composition. Results in under 60 seconds.
Dual-energy X-ray absorptiometry uses two X-ray beams at different energy levels to measure bone mineral density, lean tissue, and fat tissue. You lie on a table for 10-20 minutes while the scanner passes over your body.
| Category | FitCommit | DEXA | Winner |
|---|---|---|---|
| Accuracy | Good (+/- 3-5%) | Gold standard (+/- 1-2%) | DEXA |
| Cost | $3.99/mo (unlimited) | $75-150 | FitCommit |
| Convenience | Phone camera, anywhere | Clinics and medical facilities only | FitCommit |
| Time Per Test | 60 seconds | 10-20 minutes | FitCommit |
| Tracking Frequency | Weekly or more | Quarterly | FitCommit |
FitCommit integrates body scanning, food tracking, and transformation preview into one system. AI body scan measures your composition. AI food camera logs nutrition. After Photo shows your future body. All from your phone.
Try it free →Try all these methods in one app
AI body scan, food tracking, and transformation preview. One system.
Hydration has minimal effect on AI visual analysis compared to BIA methods (InBody, smart scales) where it can shift results by 2-3%. For best results with FitCommit, scan at the same time of day in consistent lighting.
FitCommit calculates lean mass, TDEE (using the Katch-McArdle formula from your lean mass), daily macro targets, and generates a transformation timeline. It also includes AI food scanning for macro tracking.
FitCommit works well for tracking direction and rate of change during a prep. For stage-day precision (sub-1% accuracy), a DEXA scan closer to competition is recommended. Many competitors use FitCommit weekly and DEXA quarterly.
Most apps estimate TDEE from height, weight, age, and a generic activity multiplier. FitCommit measures your lean mass via body scan and uses the Katch-McArdle formula (BMR = 370 + 21.6 x lean mass in kg), which is more accurate because muscle tissue burns more calories than fat.
Deficit levels with timelines and calorie targets for fat loss
Surplus levels with timelines and calorie targets for muscle gain
Build muscle and lose fat at the same time
Visual reference for every body fat percentage for men and women
Fasting schedules and how they affect fat loss at different body fat levels
Timelines for losing 5 to 100 pounds at different deficit levels
AI body scan from your phone camera. Body fat percentage, lean mass, TDEE, and macros. No equipment. No gym. Free 1-month trial.
Try FitCommit Free