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FitCommit vs Spren: Which is Better?

Last updated: July 15, 2026

Reviewed by Andrew Menechian, Head of Fitness, FitCommit

Honest, feature-by-feature comparison of FitCommit and Spren. See pricing, pros and cons, and which app is best for your fitness goals.

Quick Summary

FitCommit

Photo-based body-composition estimates with connected After Photo previews and flexible food tracking.

3-day free trial

Then $0.99/week. Cancel anytime.

Spren

Clinically validated body scanning from smartphone

Subscription required

Offers vary by storefront

Feature Comparison

FeatureFitCommitSpren
AI Body Scan
Body fat % + lean mass
Yes
AI Food Scan
Photo scan
No
Body Fat Tracking
AI scan from camera
AI scan from selfie
TDEE Calculation
From body composition
Not included
Macro Tracking
Included
Not included
Transformation Preview
AI-generated photo
×No
Food Database
14M+ foods
Not included
Better option
Also available

What Makes FitCommit Different

FitCommit connects all four stages in one system: body scan, plan, After Photo, and food tracking. 3-day free trial, then $0.99/week. Renews automatically unless cancelled.

Try it free →

Try FitCommit and see the difference

AI body scan + food camera + transformation preview. Free trial.

Try FitCommit Free

Pros and Cons

Spren Pros

  • Spren reports 2.6% mean absolute error versus DEXA in its September 2025 validation summary
  • Peer-reviewed validation studies
  • B2B API available for gym partnerships
  • Available on multiple mobile platforms
  • Pennington Biomedical validation

Spren Cons

  • ×Separate body-composition subscription
  • ×No transformation projections
  • ×No workout integration
  • ×No nutrition or meal tracking
  • ×Body comp only, not a complete system

Which App Should You Choose?

Choose Spren if:

  • Users who prioritize clinical validation
  • Gyms and fitness businesses (B2B API)
  • Those wanting precise body composition only
  • People outside the iPhone app audience

Choose FitCommit if:

  • Users seeking one connected body-composition and nutrition system
  • Users wanting transformation previews
  • Those seeking an integrated nutrition + body comp system
  • People who want workout programming

Pricing Breakdown

FitCommit

3-day free trial

Then $0.99/week. Cancel anytime.

  • AI body scan (body fat %, lean mass)
  • AI food scan
  • Transformation preview (3/6/12 months)
  • TDEE from body composition
  • Macro tracking

Spren

Subscription required

Offers vary by storefront

Try FitCommit Free

AI body scan, transformation preview, and smart macro tracking. See your future body before you build it. 3-day free trial, then $0.99/week. Renews automatically unless cancelled.

Start Free Trial

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