Weight is one number. Your body is the story.
On a GLP-1 the scale moves fast — but it doesn't tell you whether you lost fat or muscle. Phaze's Body Composition (Beta) gives you an AI photo estimate of body fat % and muscle, with a confidence level and a ±3–5% margin, plus DEXA scan import. It lives inside Labs & Scans, next to your weight.
At a glance
- Phaze gives an AI photo estimate of body fat % and muscle (Beta), with a confidence level and a ±3–5% margin, and can also import a DEXA scan.
- On a GLP-1 it is easy to under-fuel protein, so muscle can slip alongside fat. Tracking composition helps you keep an eye on it with your doctor.
- The AI photo estimate is free to start; DEXA import and body-comp trends are Phaze Pro.
- Body composition is encrypted with AES-256-GCM in the Apple Keychain. Photo estimates go to a 3rd-party AI only with your consent. Never sold or used to train AI.
- Track once a quarter to see meaningful change. Body Composition lives inside the Labs & Scans sheet, next to your weight.
- Available on iOS, Android, and Apple Watch.
Beyond the bathroom scale
AI estimate + DEXA import
Get an AI photo estimate of body fat % and muscle (Beta), or import a DEXA scan with OCR. A confidence level and ±3–5% margin are always shown.
The metrics that matter
Body fat %, muscle and lean mass, and fat mass — trended over time so you can watch the real change, not just the scale.
Body comp + weight, together
See body composition alongside your weight trend. When the scale stalls but your composition shifts, you'll know it's progress.
Private by design
Photo estimates go to a 3rd-party AI only with your explicit consent. Stored data is encrypted with AES-256-GCM in the Apple Keychain.
Why body composition matters more than weight
Two people at the same weight can have very different bodies. Composition tells more of the story.
Muscle is easy to under-fuel on a GLP-1. Tracking composition helps you confirm protein and training are working.
Body Composition is a Beta feature and an estimate, not a clinical measurement — DEXA import is available for a more precise reference.
Track once a quarter to see meaningful change. You don't need frequent scans.
Inside Phaze
The story your scale can't tell.
Body composition trend
Body fat
Lean mass
What this means
Body fat down, lean mass holding, exactly what you want on GLP-1. The protein and resistance work is paying off.
Mockup, values illustrative.
Frequently asked
No. It's a Beta feature that gives an AI photo estimate of body fat % and muscle, with a confidence level and a ±3–5% margin. For a precise reference, import a DEXA scan. It is not medical advice.
No. The AI photo estimate works without one. You can also import a DEXA scan (a Pro feature) for a more precise reference if you have one.
It's part of the unified Labs & Scans sheet, alongside lab tracking, so your body data stays in one place.
GLP-1s reduce appetite, which can make it easy to under-eat protein and lose muscle alongside fat. Tracking composition helps you keep an eye on it with your doctor.
Yes. Photo estimates are sent to a 3rd-party AI only with explicit consent, and stored data is encrypted with AES-256-GCM in the Apple Keychain. Never sold, never used to train AI.
Track the body, not just the number.
Free to start. Phaze Pro unlocks DEXA import and body-comp trends.
Phaze is general health software, not medical advice. Talk to your doctor.