Updated October 8, 2026

How to Track GLP-1 Doses: Semaglutide & Tirzepatide Tracking That Actually Sticks

Most people on a GLP-1 start tracking with a notes app or a spreadsheet. It works for about a month. Then a dose gets logged twice, or you can't remember which side you injected last week, or the sheet quietly falls behind and your "data" becomes guesswork. Here's what a tracking system for a weekly (or split-dose) injectable actually needs, and how to set it up.

Note: this is about record-keeping, not treatment. Doses and titration schedules come from your prescriber, not from an app or an article.

What a GLP-1 log actually needs to capture

1. Every dose, with a timestamp. Weekly injections make "did I take it Friday or Saturday?" a real problem five weeks in. One-tap logging beats retroactive memory.
2. Injection site. Rotating sites is standard practice, and remembering "left abdomen or right thigh?" across weeks is exactly what memory is bad at. A site log answers it instantly.
3. Weight over time. The number that tells you what's happening isn't any single weigh-in — it's the trend line across weeks.
4. The vial or pen you're drawing from. If you use compounded semaglutide or tirzepatide in vials, you also need reconstitution math (mg/mL → syringe units) and the date the vial was mixed, because reconstituted vials expire.
5. A reminder that survives being ignored. A calendar alert you swipe away is gone. A reminder you can mark Taken or Skip keeps the log honest.

Spreadsheet vs. app

A spreadsheet can hold columns for all of the above. What it can't do:

• remind you,
• calculate units to draw from a compounded vial,
• warn you a reconstituted vial is past its window,
• log a dose from your lock screen in one tap.

The tracking method that works is the one with the least friction on a random Tuesday morning. That's the whole argument for an app.

Setting this up in PepMinder (free, Android)

PepMinder was built for exactly this workflow:

• Add your peptide (semaglutide, tirzepatide, or anything else) with vial size and concentration. For compounded vials, the built-in calculator converts your dose to syringe units with a visual fill-line diagram.
• Create a schedule — weekly, specific days, or custom intervals — and get reliable notifications with Mark Taken and Skip actions right on the notification.
• Log injection sites with rotation history.
• Track weight and progress photos side by side with your dose log.
• Keep it private. Everything is stored locally on your phone. No account, no cloud, no data leaving your device — which matters when the data is your medication history.

The free tier covers 2 peptides — enough to see if the system sticks for you before upgrading.

PepMinder is a personal tracking and calculation tool. It does not provide medical advice, diagnosis, dosing recommendations, or protocols, and it does not sell or link to any products. Always consult a licensed healthcare provider about your treatment.