Hydrostatic is designed for a facility-based body-composition assessment. FitCommit gives you a photo-based body scan you can repeat at home and connects it to your targets, Future You, and food log. Choose based on the setting and detail you need.
Photo-based body scan accuracy
Very good accuracy
Uses photo-based AI to analyze three photos (front, side, back) and measure body fat percentage, lean mass, and measurements for trend tracking.
Also called underwater weighing. You sit on a scale submerged in a pool of water, exhale completely, and hold still while your underwater weight is recorded. The difference between your land weight and underwater weight determines body density, which calculates body fat percentage.
| Category | FitCommit | Hydrostatic | Winner |
|---|---|---|---|
| Accuracy | Photo-based body scan (Similar to InBody) | Very good (+/- 2-3%) | Hydrostatic |
| Cost | Unlimited scans included | $50-100 | FitCommit |
| Convenience | Phone camera, anywhere | Universities and specialized labs | FitCommit |
| Time Per Test | Take three photos and get your result | 15-30 minutes | Tie |
| Tracking Frequency | Weekly or more | Quarterly | FitCommit |
Accuracy ranges on this page are directional estimates from body-composition research. These methods do not measure the same physical signal, so the cleanest comparison is trend consistency, cost, access, and whether you need a clinical-grade baseline. Use one method under consistent conditions, and use clinical testing when a medical or research-grade answer matters.
FitCommit connects a photo-based body-composition scan, food tracking, and a Future You preview in one system. Each tool uses the same plan and progress inputs.
Try it free →See how the FitCommit app works →Try all these methods in one app
AI body scan, food tracking, and transformation preview. One system.
DEXA is the better choice when you need a clinical baseline. FitCommit is built for convenient at-home trend tracking. It is as precise as an InBody scan, not a DEXA scan.
No. FitCommit measures body fat and lean mass for progress tracking. It does not diagnose any condition, and a DEXA scan is the better choice when you need a clinical baseline.
Scan once a week at roughly the same time of day, in similar lighting and clothing. Body composition moves slowly, so follow the trend across several weeks instead of reacting to one result.
Lighting, clothing, posture, hydration, and normal day-to-day variation can move your result. Scan under similar conditions and follow the trend across several weeks.
Deficit levels with timelines and calorie targets for fat loss
Build muscle and lose fat at the same time
Visual reference for every body fat percentage for men and women
Plan meal timing around training, eating windows, and macro targets
How many calories you need per day by age, gender, and activity
Realistic timelines for any weight loss goal
Take three photos to measure body fat and lean mass, then connect the result to your targets and weekly trend.
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