FitCommit vs InBody (BIA Machine): Which Is Better?

Last updated: February 13, 2026

The Verdict

Both FitCommit and InBody offer similar accuracy (+/- 3-5%). FitCommit wins on cost ($3.99/month unlimited vs $25-50/scan) and convenience (phone vs gym visit). InBody wins on segmental muscle analysis. For most people, FitCommit provides better value for regular body fat tracking.

Quick Overview

Our App

FitCommit AI Body Scan

Good accuracy

Accuracy+/- 3-5%

Cost$3.99/mo (unlimited)

Time60 seconds

WherePhone camera, anywhere

InBody (BIA Machine)

Good accuracy

Accuracy+/- 3-5%

Cost$25-50

Time2-3 minutes

WhereGyms, clinics, wellness centers

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.

InBody (BIA Machine)

InBody uses bioelectrical impedance analysis (BIA) by sending small electrical currents through your body via hand and foot electrodes. It measures resistance to estimate water content, lean mass, and fat mass across different body segments.

Head-to-Head Comparison

Category	FitCommit	InBody	Winner
Accuracy	Good (+/- 3-5%)	Good (+/- 3-5%)	Tie
Cost	$3.99/mo (unlimited)	$25-50	FitCommit
Convenience	Phone camera, anywhere	Gyms, clinics, wellness centers	FitCommit
Time Per Test	60 seconds	2-3 minutes	FitCommit
Tracking Frequency	Weekly or more	Monthly	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.

InBody

Pros

✓Quick scan (under 3 minutes) with detailed segmental analysis.
✓Available at many commercial gyms and wellness centers.
✓Measures muscle mass distribution across arms, legs, and trunk.
✓No radiation. Completely non-invasive.
✓Provides a detailed printed report.

Cons

×Accuracy heavily affected by hydration, food intake, and exercise.
×$25-50 per scan adds up for regular tracking.
×Not available everywhere. Requires a gym or clinic with an InBody machine.
×BIA technology has inherent limitations for very lean or very obese individuals.
×Results can swing 2-3% based on when you ate or drank water.

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 InBody if:

✓Gym members whose facility has an InBody machine.
✓People who want segmental muscle analysis (arms, legs, trunk).
✓Monthly or quarterly check-ins as part of a gym membership.

Frequently Asked Questions

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.

What do I need for a FitCommit body scan?

A smartphone camera, decent lighting, and form-fitting clothing (or minimal clothing). Take three photos: front, side, and back. The AI processes results in under 60 seconds. No special equipment or appointments needed.

How accurate is FitCommit compared to a DEXA scan?

FitCommit AI body scan has an error margin of +/- 3-5%, compared to DEXA at +/- 1-2%. For tracking trends over time, FitCommit is more practical because you can scan weekly for $3.99/month vs $75-150 per DEXA visit.

Can an AI body scan replace clinical measurements?

For general fitness tracking, yes. FitCommit provides body fat percentage, lean mass, TDEE, and macros from your phone camera. For medical diagnostics or research, clinical methods like DEXA remain the standard.

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 InBody (BIA Machine): 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

InBody (BIA Machine)

Good accuracy

Accuracy+/- 3-5%

Cost$25-50

Time2-3 minutes

WhereGyms, clinics, wellness centers

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.

InBody (BIA Machine)

Head-to-Head Comparison

Category	FitCommit	InBody	Winner
Accuracy	Good (+/- 3-5%)	Good (+/- 3-5%)	Tie
Cost	$3.99/mo (unlimited)	$25-50	FitCommit
Convenience	Phone camera, anywhere	Gyms, clinics, wellness centers	FitCommit
Time Per Test	60 seconds	2-3 minutes	FitCommit
Tracking Frequency	Weekly or more	Monthly	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.

InBody

Pros

✓Quick scan (under 3 minutes) with detailed segmental analysis.
✓Available at many commercial gyms and wellness centers.
✓Measures muscle mass distribution across arms, legs, and trunk.
✓No radiation. Completely non-invasive.
✓Provides a detailed printed report.

Cons

×Accuracy heavily affected by hydration, food intake, and exercise.
×$25-50 per scan adds up for regular tracking.
×Not available everywhere. Requires a gym or clinic with an InBody machine.
×BIA technology has inherent limitations for very lean or very obese individuals.
×Results can swing 2-3% based on when you ate or drank water.

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 InBody if:

✓Gym members whose facility has an InBody machine.
✓People who want segmental muscle analysis (arms, legs, trunk).
✓Monthly or quarterly check-ins as part of a gym membership.

Frequently Asked Questions

How does FitCommit calculate TDEE differently?

What do I need for a FitCommit body scan?

How accurate is FitCommit compared to a DEXA scan?

Can an AI body scan replace clinical measurements?

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