OptiPin
Retatrutide Tracker for iPhone
OptiPin is a private retatrutide tracker that turns a weekly injection into a clean, reviewable record. Log each dose, track your escalation over time, reconstitute vials with the built-in calculator, rotate injection sites, chart your weight over the dose timeline, and note side effects - with a reminder when the next dose is due and a warning before a vial runs out. Everything stays on your device; no account, no cloud upload.
Track your retatrutide on iPhone
Weekly dose log, escalation tracking, built-in vial reconstitution, weight-over-dose charts, side-effect logging and runout warnings - private and on-device. Free to start.
Download on the App StoreWhy track retatrutide at all
Retatrutide is an investigational triple agonist with a roughly six-day half-life, so a weekly dose stacks toward steady state over about four to five weeks. Because it comes as a lyophilized vial rather than a pre-filled pen, there are two extra things to keep straight that a notes app won't: the reconstitution math (vial size + water → syringe units) and where you are in an escalation. A tracker makes both visible, and lets you tie weight, appetite and side effects to which week and which dose you were on.
OptiPin handles the vial side natively - pick the compound, reconstitute, and every dose is logged in real units against a timeline you can actually read.
What the OptiPin retatrutide tracker does
Running retatrutide alongside other GLP-class compounds, or switching to it? OptiPin tracks it next to tirzepatide and semaglutide on one timeline. For the trial data, half-life and reconstitution math behind the molecule, see the retatrutide reference.
Free dose tools for retatrutide
Calculators that pair with tracking - no app needed to use them:
- Reconstitution calculator - turns vial size + bacteriostatic water into exact syringe units (and works in reverse).
- Half-life visualizer - see how once-weekly doses stack toward steady state on a ~6-day half-life.
- Retatrutide reference - Phase 3 results, half-life and the reconstitution math, with sources.
- GLP-1 titration schedule - how weekly escalation is structured across the GLP class.
One app for everything you're on
The real advantage of OptiPin is that retatrutide doesn't live in isolation. If you're also on TRT, a peptide, or a supplement stack, all of it sits in one place with a single timeline and one set of insights - instead of fragmented across a notes file and your memory. That's the difference between logging a compound and actually seeing your protocol.
Your retatrutide, on a timeline you control
Doses, escalation, reconstitution, weight, side effects and runout warnings - private, on-device, free to start.
Download on the App StoreFAQ
Is there an app to track retatrutide?
Yes - OptiPin. You log each weekly injection, track your escalation, reconstitute vials with the built-in calculator, rotate sites, chart weight over your dose timeline, record side effects, and get reminders plus runout warnings. It's on iPhone, stores data on-device and needs no account.
Is retatrutide approved?
No. As of June 2026 it's an investigational triple agonist in Phase 3 trials, not approved by the FDA or EMA. Research-grade or compounded material is an unregulated channel with no verified purity, sterility or dose accuracy. See the retatrutide reference.
Can OptiPin help reconstitute retatrutide vials?
Yes. Retatrutide comes as a lyophilized vial; the built-in reconstitution calculator turns vial size and water volume into exact syringe units (the same tool is free on the web). It's arithmetic only, not a dose recommendation.
Does it track weight alongside retatrutide?
Yes. Log weight and measurements (or read them from Apple Health) and OptiPin plots them over your injection timeline, so you can see how weight tracks against weeks on each dose.
Does it work offline and keep my data private?
Yes. Everything is stored on-device and works offline. There's no account and no required cloud sync, so your log isn't uploaded to a server.
Related
Retatrutide science · Zepbound tracker · Wegovy tracker · Reconstitution calculator · GLP-1 guide