FitCommit vs DEXA Scan: Which Is Better?

Last updated: February 13, 2026

The Verdict

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.

Quick Overview

Our App

FitCommit AI Body Scan

Good accuracy

Accuracy+/- 3-5%

Cost$3.99/mo (unlimited)

Time60 seconds

WherePhone camera, anywhere

DEXA Scan

Gold standard accuracy

Accuracy+/- 1-2%

Cost$75-150

Time10-20 minutes

WhereClinics and medical facilities only

How Each Method Works

FitCommit AI Body Scan

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.

DEXA Scan

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.

Head-to-Head Comparison

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

Pros and Cons

FitCommit

Pros

✓Scan anytime from your phone. No appointments, no equipment.
✓Unlimited scans for $3.99/month. Track progress weekly.
✓Also calculates TDEE, macros, and transformation timelines.
✓Results include lean mass, not just body fat percentage.
✓Free 7-day trial to test accuracy before committing.

Cons

×Less accurate than clinical methods like DEXA or Bod Pod.
×Requires good lighting and consistent photo angles for best results.
×AI estimation, not direct measurement of tissue density.

DEXA

Pros

✓Gold standard accuracy for body composition measurement.
✓Measures regional fat distribution (where fat is stored).
✓Also measures bone mineral density.
✓Consistent results between different machines and operators.
✓Accepted in clinical research and medical settings.

Cons

×$75-150 per scan makes frequent tracking expensive.
×Requires an appointment at a clinic or imaging center.
×Low-level radiation exposure (minimal but present).
×Results can shift based on hydration status.
×Not available in most gyms. Limited locations.

Which Should You Choose?

Choose FitCommit if:

✓People who want to track body composition regularly without clinic visits.
✓Budget-conscious users who cannot afford $75-150 DEXA scans.
✓Anyone who wants body fat, TDEE, macros, and timelines in one app.

Choose DEXA if:

✓Baseline measurements when starting a fitness program.
✓People who need clinical-grade accuracy for medical reasons.
✓Quarterly check-ins for serious athletes or bodybuilders.

Frequently Asked Questions

Does hydration affect AI body scan accuracy?

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.

What else does FitCommit measure besides body fat?

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.

Is FitCommit accurate enough for bodybuilding prep?

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.

How does FitCommit calculate TDEE differently?

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.

Related Guides

Cutting Guide

6 deficit levels with timelines and calorie targets for fat loss phases

Bulking Guide

3 surplus levels with timelines and calorie targets for muscle gain phases

Weight Loss Timeline

Exact timelines for losing 5, 10, 20, 50, or 100 pounds at different deficit levels

Calorie Guide

Understand deficit and surplus percentages with TDEE calculations

Get Your Body Fat Percentage in 60 Seconds

AI body scan from your phone camera. Body fat percentage, lean mass, TDEE, and macros. No equipment. No gym. Free 7-day trial.

Try FitCommit Free

FitCommit vs DEXA Scan: Which Is Better?

Last updated: February 13, 2026

The Verdict

Quick Overview

Our App

FitCommit AI Body Scan

Good accuracy

Accuracy+/- 3-5%

Cost$3.99/mo (unlimited)

Time60 seconds

WherePhone camera, anywhere

DEXA Scan

Gold standard accuracy

Accuracy+/- 1-2%

Cost$75-150

Time10-20 minutes

WhereClinics and medical facilities only

How Each Method Works

FitCommit AI Body Scan

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.

DEXA Scan

Head-to-Head Comparison

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

Pros and Cons

FitCommit

Pros

✓Scan anytime from your phone. No appointments, no equipment.
✓Unlimited scans for $3.99/month. Track progress weekly.
✓Also calculates TDEE, macros, and transformation timelines.
✓Results include lean mass, not just body fat percentage.
✓Free 7-day trial to test accuracy before committing.

Cons

×Less accurate than clinical methods like DEXA or Bod Pod.
×Requires good lighting and consistent photo angles for best results.
×AI estimation, not direct measurement of tissue density.

DEXA

Pros

✓Gold standard accuracy for body composition measurement.
✓Measures regional fat distribution (where fat is stored).
✓Also measures bone mineral density.
✓Consistent results between different machines and operators.
✓Accepted in clinical research and medical settings.

Cons

×$75-150 per scan makes frequent tracking expensive.
×Requires an appointment at a clinic or imaging center.
×Low-level radiation exposure (minimal but present).
×Results can shift based on hydration status.
×Not available in most gyms. Limited locations.

Which Should You Choose?

Choose FitCommit if:

✓People who want to track body composition regularly without clinic visits.
✓Budget-conscious users who cannot afford $75-150 DEXA scans.
✓Anyone who wants body fat, TDEE, macros, and timelines in one app.

Choose DEXA if:

✓Baseline measurements when starting a fitness program.
✓People who need clinical-grade accuracy for medical reasons.
✓Quarterly check-ins for serious athletes or bodybuilders.

Frequently Asked Questions

Does hydration affect AI body scan accuracy?

What else does FitCommit measure besides body fat?

Is FitCommit accurate enough for bodybuilding prep?

How does FitCommit calculate TDEE differently?

Related Guides

Cutting Guide

6 deficit levels with timelines and calorie targets for fat loss phases

Bulking Guide

3 surplus levels with timelines and calorie targets for muscle gain phases

Weight Loss Timeline

Exact timelines for losing 5, 10, 20, 50, or 100 pounds at different deficit levels

Calorie Guide

Understand deficit and surplus percentages with TDEE calculations

Get Your Body Fat Percentage in 60 Seconds

AI body scan from your phone camera. Body fat percentage, lean mass, TDEE, and macros. No equipment. No gym. Free 7-day trial.

Try FitCommit Free