Injection Tracker App
Log every injection with its site, and let rotation take care of itself.
Published by Pep AI · Injection tracker · Updated August 2026
The two things people fail to remember about injections are when the last one was and where it went. The first has obvious consequences. The second has slow ones — repeated injection in the same area thickens the tissue, absorption from it becomes erratic, and because the affected area is usually less sensitive, comfort quietly steers you toward exactly the spot you should be avoiding.
Pep AI records the site with every dose and rotates automatically, so the pattern is a fact rather than an impression. Seeing that most of the last thirty injections landed in one quadrant is information you cannot get from memory.
It works the same whether you are on a weekly GLP-1 pen or a daily peptide protocol — one log, one rotation model, one history.
Rotation that actually happens
Rotation fails because nobody remembers the last spot. A record removes the problem entirely.
Visual site history
See where every injection has gone, so drift toward a favourite region is visible instead of invisible.
Doses & schedules
Daily, every-other-day, or fully custom. Get a reminder when it's time, log it in one tap, and your history builds itself.
Vials & reconstitution
Enter your vial and bacteriostatic water and Pep AI converts your dose into exact syringe units — no mixing math, no guessing.
Injection sites
Automatic site rotation so you always know where the last shot went and where the next one should go.
Estimated levels
See your estimated compound level rise and fall between doses, modelled from your schedule and published half-lives.
Pep Bot
An AI assistant with a research-literature retrieval pipeline. Ask what a compound is or how a half-life works — it won't tell you what to take.
Frequently asked questions
Why does injection site rotation matter?+
Repeated injection in one area causes the fatty tissue to thicken — lipohypertrophy — and absorption from affected tissue becomes slow and unpredictable. It is usually painless and often less sensitive than surrounding skin, so people gravitate toward it without noticing.
Does it work for GLP-1 pens as well as vials?+
Yes. Pens and vials are both supported, and site tracking works identically for either.
Does Pep AI give medical advice?+
No. Pep AI is a tracking and organisation tool, not a medical device. It does not recommend compounds, doses or schedules, and Pep Bot declines dosing questions. What to take stays between you and a qualified clinician.
Start tracking smarter today.
Download Pep AI free on iOS and Android.