Lean · GLP-1 Muscle Tracker
Protein & strength on GLP-1
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
On a GLP-1 medication? Hit your protein, track your lifts, and see the chart no calorie app shows: weight falling while strength holds. Proof your muscle is staying.
Losing weight on a GLP-1 medication is the easy part. Keeping your muscle is the part nobody helps you with. Lean is the GLP-1 companion built around one promise: lose the fat, keep the strength — and see the proof.
Other apps just count calories with a "GLP-1 mode" bolted on. Lean leads with the thing you actually fear: muscle loss. It coaches your protein, tracks your strength, and around day 14 draws the one chart no calorie tracker will show you — your weight trending down while your lifts hold steady. That's muscle retention, made visible.
PROTEIN, IN TWO TAPS
• A daily protein ring with a target sized to your body weight
• Two-tap logging — quick chips for the foods and shakes you eat every day
• Honest 7-day streak that forgives your low-appetite injection day instead of punishing it
• No guilt, no shaming — just a clear "did I get enough protein today"
STRENGTH YOU CAN PROVE
• Log your key lifts and bodyweight in seconds
• Set a baseline at the start so you have something to hold the line against
• See, week over week, that the weight on the bar isn't dropping with the weight on the scale
THE MUSCLE-RETENTION PROOF
• The signature chart: bodyweight down, strength flat or up — the muscle is staying
• Long-term trends as your journey continues
• Export a clean CSV or PDF to share with your doctor or clinician
BUILT FOR THE GLP-1 JOURNEY
• Set your medication, dose, and start date
• A calm, clinic-quiet design — reassuring, never gym-aggressive or alarmist
• Adaptive protein target that scales as your weight changes
FREE FOREVER, NO ACCOUNT NEEDED
Log your protein, track your lifts, keep your 7-day history, and use the daily ring and streak — free, for as long as you want. Sign in with Apple is optional. Your data lives on your device.
LEAN PRO
Unlock the muscle-retention graph, unlimited history and long-term trends, the adaptive protein target, and doctor-ready CSV/PDF export.
• 7-day free trial, then $79.99/year (about $6.67/month)
• Payment is charged to your Apple ID at confirmation of purchase
• A free trial automatically converts to a paid annual subscription unless cancelled at least 24 hours before it ends
• Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period; manage or cancel anytime in your App Store account settings
Light, dark, and system appearance are free for everyone — no theme is locked behind Pro.
IMPORTANT — NOT MEDICAL ADVICE
Lean is a fitness and self-tracking tool, not a medical device or a substitute for professional care. It does not diagnose, treat, prevent, or manage any condition, and it does not provide medical, nutritional, or pharmaceutical advice. Protein targets and any other figures are general estimates, not a prescription. Always follow the guidance of your own doctor or healthcare provider about your medication, diet, and exercise — especially before changing your protein intake or starting a resistance-training program while on a GLP-1 medication. Never disregard professional medical advice because of something you read in this app.
Privacy: https://lumenlabs.works/lean/privacy/
Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
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The developer, Lumen Labs, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- NOVA-LUMEN LABS LLP
- Size
- 57.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Lumen Labs