Body recomposition tracker

Same weight. Different body.

When you lose fat and build muscle at the same time, the scale barely moves for months. Your photos and waist measurement show what’s really happening.

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  • Private to you
  • No account
  • No subscription
  • iPhone & Android
Before: Week 1After: Week 16Week 1Week 16
±0 lbWeight−2 inWaist
ProgressLens comparing two check-ins

Illustrative example photos.

In short

To track body recomposition, watch for a waist that goes down while your weight stays about the same and your arms, chest or shoulders hold or grow. Matching photos taken 8 to 12 weeks apart usually make it obvious. ProgressLens keeps all of these together on one private timeline.

The recomp signal

Weight flat. Waist down. Arms up.

That’s what working recomposition looks like. ProgressLens shows your photos and those numbers side by side, so you can see it instead of guessing.

Read how to track body recomposition.

Measurement trends

How it works

Thirty seconds a week.

No setup, no sign-up, no learning curve. Open the app, take your photo, done.

Snap your photo

Snap your photo

Front, side and back. Your last photo shows faintly on the screen, so you stand in the same spot every time.

Add a number or two

Add a number or two

Weight and waist take ten seconds. Skip them if you’d rather not. The photos do the talking.

See the difference

See the difference

Pick any two days and flip between them. That’s the moment it clicks.

FAQ

Questions, answered

How do I know if recomposition is working?

Your waist goes down while your weight stays roughly the same, and matching photos look leaner and fuller.

How long until I see it?

Usually 8–12 weeks of consistent training before photos show a clear difference.

Are my photos private?

Yes. They stay inside the app on your phone: not in your photo gallery, not in the cloud, and there’s no account. Nobody sees them unless you share.

Is it free?

Free to download and try, with every feature. Your first 10 check-ins are free, then one payment unlocks unlimited check-ins forever. No subscription.

Does it work on iPhone and Android?

Yes, on iPhone and iPad (iOS 17 or later) and Android (Android 7.0 or later).

Get ProgressLens

Your future self will thank you for the first photo.

Take it today. In a few months, it’ll be the one that shows how far you’ve come.

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ProgressLens before and after comparison