01Check in
Guided photos keep the weekly signal comparable.
Physique intelligenceiPhone · private by design
Progress photos that explain what changed.
Pair a gym selfie with weight, estimated body fat, and training context—then see whether you're gaining muscle, losing fat, or just moving the scale.
4.9 ★from 35 ratings5,000 liftersNo account required
The 38-second filmPhoto in. Progress explained.
Body fat trend✦12 muscle groups✦Smart Import✦Private Coach✦Before / after✦Future You✦
The progress system
One photo. Four jobs. One clear story.
Each check-in becomes more useful as it moves through the system. Start anywhere, then follow the signal forward.
- Capture
Turn a consistent check-in into a physique readout.
Open scan chapter ↘ - Compare
Align two moments so subtle changes are easier to see.
Open compare chapter ↘ - Explain
Ask what moved, with your available trend data attached.
Open Coach chapter ↘ - Preview
Explore an illustrative goal scenario with honest limits.
Open Future You ↘
01Photo analysis / body composition
Turn one check-in into a full physique readout.
Start with one photo for a quick scan, or add multiple angles for a more precise estimate. GainFrame maps body fat, FFMI, lean mass, and muscle-group scores into one report.
- 01 Estimated body fat
- 02 FFMI + lean mass
- 03 12 muscle groups
Analysis fieldBefore → after
02Compare / see the difference
Make the change impossible to miss.
Line up any two photos, choose the same pose, and use smart filters to reduce the visual noise. Then open a Deep Dive to see what moved and what to focus on next.
A/Bside by side
Δ BFtrend context
Deepdive report
03Coach / grounded context
Ask what changed. Get an answer tied to your data.
Coach can use check-ins, body metrics, Apple Health, workouts, cardio, and nutrition when those sources are available—so the explanation starts with your trend, not a blank chat box.
Why did my score drop?How am I trending overall?What should I focus on next?
Sources open
04Smart Import / build your history
Your camera roll already contains a transformation.
Smart Import classifies old gym photos by pose and builds the timeline for you—without making you sort every selfie by hand.
A / classify
Pose matched ✓
B / reconstruct
History restored ↗
Old photos inClear trend out
Day · week · month · quarter · year
05Project / Future You
Make the goal feel visible.
Choose a 3, 6, or 12 month horizon and explore an illustrative physique scenario based on your selected goal and intensity.
Illustrative AI projection—not a prediction or medical advice.
06The weekly system
Small inputs. A useful history.
Keep the loop light enough to repeat and rich enough to explain.
02Look back
Automatic throwbacks surface progress you may have missed.
03Connect weight
Read the scale beside physique changes, not in isolation.
R / 01The receipts
A photo is evidence. A system makes it useful.
This is a workflow comparison, not a scorecard. It shows how much assembly is left to you after the photo is taken.
| What you need | Camera roll | Scale only | One-off AI photo tools | GainFrame |
|---|---|---|---|---|
| Aligned photo comparisons | Manual | Missing | Partial | Built in |
| Trend context over time | Manual | Partial | Missing | Built in |
| Body metrics linked to the photo | Missing | Partial | Partial | Built in |
| Structured on-device photo history | Manual | Missing | Missing | Built in |
| Follow-up explanations | Missing | Missing | Partial | Built in |
“Partial” and “Manual” describe the typical workflow, not accuracy. One-off tools vary. GainFrame estimates are not medical measurements.
Reality check
Useful estimates. Honest limits.
In one documented head-to-head, GainFrame estimated 19% body fat and DEXA measured 18.6%. One user's test—not a validation study.
Photos are sent securely for AI analysis and are never stored outside your device by GainFrame. Coach history stays on-device.
No cloud account is required to use the app. Your weekly trend does the real work over time.
0760-second check-in
Snap. Analyze. Ask.
- 01
Take the photo
Use guided front, side, and back poses with consistent framing.
- 02
Read the report
Review estimated body fat, FFMI, lean mass, and muscle scores.
- 03
Ask Coach why
Connect the photo to your available lifts, recovery, and nutrition.
08FAQ / good to know
Questions before your first scan.
How accurate is GainFrame's body fat estimate?
In one documented head-to-head against a clinical DEXA scan, GainFrame's estimate agreed within 0.4 percentage points (DEXA: 18.6%, GainFrame: 19%). That is one user's test, not a peer-reviewed or multi-person validation. Consistent weekly conditions make the trend the most useful part.
Does GainFrame replace a DEXA scan?
No. DEXA still provides bone density and absolute visceral-fat measurements that a photo app cannot. GainFrame is designed for convenient at-home physique tracking between check-ins.
What can Coach use?
When available, Coach can use your check-ins, body metrics, Apple Health data, Hevy workouts, Strava activity, nutrition logs, and selected comparisons. You can inspect the sources in the app.
Are my progress photos private?
Photos are sent securely for AI analysis and are never stored outside your device by GainFrame. No cloud account is required, and Coach conversation history is stored on-device only.
Can I import old gym photos?
Yes. Smart Import classifies old photos by pose and builds a continuous transformation timeline without manual sorting.
Your progress starts here
Take the photo.
See the signal.
Start free with one check-in. Your future trend starts there.
Download GainFrame