PenPal GLP-1 Tracker
Your Weight Management Buddy
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Your Personal GLP-1 Medication Companion
PenPal helps people using Ozempic, Wegovy, Mounjaro, and Zepbound stay on track and see if their medication is working.
INJECTION TRACKING
- Never miss a dose — Log injections with date, time, dose, and injection site
- Smart reminders — Know exactly when your next injection is due
- Site rotation — Keep track of where you inject to follow best practices
- Dose progression — Follow the recommended escalation schedule for your medication
- Bulk import — Quickly add historical data when switching from another app
WEIGHT MANAGEMENT
- Easy logging — Quick-entry buttons make recording your weight fast
- Flexible units — Switch seamlessly between metric (kg) and imperial (lbs)
- Goal tracking — Set a target weight and watch your progress
- Trend analysis — See your weekly rate and total progress over time
- Healthy pace guidance — Know if you're losing at a sustainable rate
SMART INSIGHTS
PenPal doesn't just store data — it helps you understand it:
- Goal projections — See your estimated goal date based on current progress
- Plateau detection — Get notified when your weight stalls for 3+ weeks
- Dose awareness — Know when it may be time to talk to your doctor about the next step
- Injection consistency — Track your adherence and timing patterns
- Progress updates — Stay motivated with personalized milestones
MEDICATION SCIENCE
Understand how your medication works with pharmacokinetics visualization:
- Residual level chart — See estimated medication levels in your system over time
- Half-life tracking — Semaglutide (7 days) and Tirzepatide (5 days) decay curves
- Steady-state progress — Know when you've reached optimal medication levels
APPLE HEALTH INTEGRATION
- Import weight from Apple Health automatically
- Export weight entries back to Health for a complete record
- Sync height during onboarding for accurate BMI calculations
- Background sync keeps everything up to date
ICLOUD SYNC
Your data follows you across iPhone, iPad, Mac, and Apple Vision Pro:
- Secure cloud backup — Never lose your health data
- Multi-device sync — Start on iPhone, check on iPad or Mac
- Privacy options — Keep data local-only if you prefer
CUSTOMIZABLE DASHBOARD
- Reorderable cards — Drag and drop to prioritize what matters
- Show or hide cards — Only see the information you care about
JOURNEY MANAGEMENT
Track multiple treatment periods:
- Switched medications? Start a new journey while keeping your full history
- Compare progress across different treatments side by side
PRIVACY FIRST
- All data stays on your device and in your personal iCloud account
- We never see, collect, or share your health information
- No ads, no analytics, no tracking
GETTING STARTED
PenPal is free to get started with up to 12 injections. Upgrade to Premium for unlimited tracking and full access to all
features. Take a guided tour with demo data to explore everything before entering your own information.
PenPal is a tracking tool and does not provide medical advice. Always consult your healthcare provider about your treatment.
Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
- Enhanced Goal Progress card: best and slowest weeks now show when they happened and your medication level at that time
- Bug fixes and performance improvements
The developer, 敏 张, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- 敏 张
- Size
- 10.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - Mac
Requires macOS 26.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.2 or later.
- iPhone
- Languages
English and 32 more
- English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- PenPal Annual USD 34.99
- PenPal Buddy Monthly USD 7.99
- Copyright
- © 2026 Peng Zhang