Free Peptide Tracker App for iPhone & Android

It depends on what you are tracking. Regimen is the most complete option if you run more than one compound, want the reconstitution math handled, or care about seeing estimated levels and bloodwork alongside your doses. If you only need a simple log for a single peptide on iOS, lighter apps like PepTracker will do the job. We compare all of them honestly in our [peptide tracker app comparison](/blog/best-peptide-tracker-apps-2026).

Regimen runs on both, with the same features on each. That matters more than it sounds: most peptide apps are iPhone-only or ship a thin Android version. Regimen syncs with Apple Health on iOS and Google Health Connect on Android.

Yes. Regimen is free for one compound, and the free tier is not a stripped-down demo: it includes the reconstitution calculators, estimated level curves, injection site tracking, bloodwork entry, and Apple Health or Health Connect sync. Premium unlocks tracking more than one compound at a time.

Yes. Each compound gets its own start and end date, and Regimen shows where you are in the cycle rather than leaving it in your head. Run several compounds on different cycles and each keeps its own timeline, so on weeks and off weeks stay visible per compound. Your protocol shows up as a day-by-day calendar with a reminder for each dose.

Yes. Enter your vial size in mg and how much bacteriostatic water you added, and Regimen gives you the exact units to draw on a standard insulin syringe. It works in reverse too: pick the unit count you would rather draw and it tells you how much water to add. The concentration is saved with the vial, so you do it once.

Regimen keeps an inventory of what you have on hand and alerts you when you are running low, so you can reorder before you run out rather than the morning you find an empty vial. It also stores the concentration you mixed, so the units to draw stay right for that vial. Per-vial dose counting is being reintroduced and is not live yet.

Yes, and it is what Regimen is built for. Each compound keeps its own dose, schedule and cycle, and they all appear on one timeline. You can see estimated levels for several compounds at once rather than one at a time. That includes running retatrutide (reta) alongside recovery peptides like BPC-157.

Yes. Regimen covers 200+ compounds and brands across peptides, GLP-1 medications and testosterone, in one protocol view. Most trackers pick one category; if you run a stack that crosses categories, that usually means two or three apps.

Yes. You can enter lab panels with 50+ markers and see them plotted against your dose history, so a change in a marker sits on the same chart as the protocol that might explain it.

Yes. Regimen ships on iPhone and Android, including Google Health Connect for wearable and health data. Several peptide trackers are iOS only, so this is worth checking before you commit to one.

Threads comparing peptide trackers come up constantly in r/Biohackers and r/peptides. Regimen is our answer for multi-compound protocols; the full comparison, including the apps those threads discuss, is in our best peptide tracker apps review.