Built to protect your muscle, not just your weight loss.
In the STEP-1 trial, 39% of weight lost on GLP-1 was lean mass. glpfit helps you keep more by tracking what matters: protein, training, and body composition.
STEP-1, NEJM 2021
Hi Sam
Week 13
GLP FIT SCORE
↑ 4 from last week
Hit 110g protein today to lock in this week's muscle gains.
Muscle
92.5 lb
+0.3
Goal by
Jul 20
39%
of GLP-1 weight loss
is lean mass (STEP-1)
10–25%
industry-baseline muscle loss
drops sharply with adequate protein + training
1.0 g/lb
protein target
the floor for muscle preservation in a deficit
Muscle mass first
Trial data shows ~10% of GLP-1 weight loss is muscle. We surface it as the headline metric — not weight.
Free Apple Health sync
Shotsy paywalls Apple Health. We don't. Daily auto-pull via a one-time Shortcut — no typing required.
Privacy-first
We don't sell prescriptions. We don't share with advertisers. Export anytime. Delete anytime. Forever.
What's inside
Built around the four things that actually move the needle on GLP-1.
THE WEDGE
See what kind of weight you're losing — in real time.
Slide protein and training inputs to see how much muscle you'd preserve at your goal weight. Trial-data-grounded, updates the second you change a setting.
Body
What kind of weight are you losing?
Of every pound lost, this much comes from muscle.
Current habits
22%
With tweaks
9%
+1.8 lb saved
✓ recommended
AI COACH
Your data, in plain English.
A daily one-line status and a weekly Sunday email written in coach voice — surfaces patterns you'd never spot in a sparkline. AI-powered, scoped to your data.
AI Today
Updated 2h ago
Down 1.4 lb this week, but only 0.3 lb came from fat — protein is running 30g below target.
This week, focus on
Updated 2d ago
Hit 110g protein 4 days
You hit it once last week. The Sunday-Wednesday window is where it usually drops.
See 2 more ↓
PHOTO LOGGING
Log a meal in 5 seconds.
Tap the (+) button, take a photo of your plate, and AI estimates protein grams with a confidence rating. No manual search, no barcode scanning.
Log
Protein
Total today
82g
Detected: grilled chicken, brown rice, broccoli
MEDICATION LEVEL
Visualize your dose cadence.
Estimated plasma concentration based on each medication's half-life — see when you're peaking, when you're trough, and when your next shot should be. Shotsy users will recognize this; we made it free.
History
Shots
Due tomorrow
73% of recent peak
Estimated plasma level
Dose progression
7.5 mg latest
Right thigh
Left thigh· nausea 1
How we compare
| Feature | glpfit | Shotsy | MeAgain |
|---|---|---|---|
| Shot logging + site rotation | ✓ | ✓ | ✓ |
| Apple Health weight sync (free) | ✓ | — | — |
| Body composition / muscle mass | ✓ | — | — |
| Cloud sync + multi-device | ✓ | — | ✓ |
| AI coach + weekly summary email | ✓ | — | — |
| Photo-protein logging | ✓ | — | ✓ |
| Doctor PDF report | ✓ | — | — |
| Estimated medication-level chart | ✓ | ✓ | — |
| Prescription-agnostic | ✓ | ✓ | — |
| We don't sell your data | ✓ | ✓ | ✓ |
Founder pricing — first 100 users
$129 lifetime. Locks in everything.
Photo-protein logging, weekly AI summaries, smart-scale integration, and the native iOS app when it ships. No subscription. No upsells.