
PenDay: GLP-1 Shot Tracker
Doses, weight & side effects
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Free
In-App Purchases
About
PenDay is a private logbook and reminder for weekly GLP-1 injections (semaglutide, tirzepatide). It records what you enter and reminds you of your own schedule — nothing more, nothing less.
THE WEEKLY LOOP
• A next-shot countdown on your home screen and in an iOS widget.
• Log a shot in about five seconds: dose is pre-filled, pick the injection site on a body map.
• See the site you've used least recently, front and back, as a simple fact.
• Reminders on your shot day, created on your device — nothing is pushed from a server.
THE DAILY LOOP
• A ten-second check-in for side effects and an optional mood tick.
• Record weight manually, or show weight and steps from Apple Health (read-only).
• Watch your weight trend take shape over time.
FOR YOUR DOCTOR
• Generate a one-tap Doctor-Visit PDF: weight curve, injection log, dose history, and a side-effect summary — all as entered by you.
PRIVATE BY DESIGN
• No account. No sign-in. No servers. Your entries stay on your device.
• Your health data never leaves your device — not in exports, not in the report, not anywhere.
• Move to a new phone with an encrypted transfer file that only your passphrase can open.
PenDay is a logbook. It records what you enter; it does not provide medical advice, interpret symptoms, or recommend doses. For questions about your medication, talk to your doctor or pharmacist.
PenDay Pro (optional subscription) unlocks the doctor-visit report, full history and trends, dose-change overlays, site-rotation history, pen-supply tracking, and the widget. A 14-day free trial is included. Monthly, yearly, and lifetime options are available.
Legal
To use this app, you must agree to our End User License Agreement (EULA), available: Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
To use this app, you must agree to our Privacy Policy, available: https://qooplabs.com/penday/privacy-policy
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What's New in PenDay
1.0.0
August 6, 2026
Subscription plans
PenDay Pro Monthly
Full history, trends, and the doctor-visit report.
$4.991 Month
14 Days trial1
In-App Purchases
$79.99
PenDay Pro Lifetime
Lifetime Pro



