The best peptide tracker app in 2026: Peppy and eight alternatives, compared from their own sites

The best peptide tracker app depends on what you inject. GLP-1-only users have Shotsy, Glapp, Pep and MeAgain, which add food logging. People running research peptides need a reconstitution calculator, a half-life chart and cross-protocol site rotation, which narrows it to Peppy, Dose Track, Regimen, Peptide Tracker and LynkDose. Peppy is iPhone-only, private by design, with 123 compounds built in and no AI coach.

How this comparison was made

Every "best peptide tracker app" list on the internet is written by one of the apps, including this one. So the rules here are strict. Each competitor's row comes from that app's own website, read on 30 August 2026, and the table records what the site claims, not what we think of it. Where a site does not mention a feature, the cell says "not listed on their site" rather than "no". Prices are the ones printed on the site; where none is printed, it says so. We did not install and score every app. Peppy's row comes from the app itself, and its gaps are listed just as plainly at the end.

One distinction drives most of the table. GLP-1 trackers (Shotsy, Glapp, Pep, MeAgain) are built for Ozempic, Wegovy, Mounjaro and Zepbound pens, and several add food logging. Peptide trackers (Peppy, Dose Track, Peptide Tracker, Regimen, LynkDose) add the things vials require: a reconstitution calculator, a half-life or level chart, inventory and rotation across several compounds. If you take compounded semaglutide or tirzepatide from a vial, you are in the second group even though the medication is a GLP-1.

The comparison table

The GLP-1-only apps

Shotsy is the most established GLP-1 tracker: shot log, weekly reminders, site map, side-effect log, weight charts, food logging and a shareable report, on iOS and Android. If you take a pen and want nutrition in the same app, it is a sensible pick. It has no vial math and no peptides. Glapp leans on its level curve and "injection phases", a peer comparison against trial results and an AI question box; site rotation is not mentioned. Pep is close to Shotsy in scope, with a level indicator, site rotation, Apple Health sync and a widget, and adds AI food photo recognition. MeAgain is the food-heaviest of the four, with an AI companion and a nutrition plan on top of dose and side-effect logging. All four list Android.

The peptide trackers

Dose Track is the broadest: peptides, TRT and GLP-1s, PK modeling, a calculator, site mapping, bloodwork OCR and an AI coach, with an on-device, iCloud-synced privacy model similar to Peppy's. It is also the most expensive on the list. Regimen covers a similar range with Apple Health and Health Connect correlations and lets you use every feature free for one compound. Peptide Tracker (peptidetracker.ai) lists a calculator, level curves, rotation, inventory, photos and a community forum, and says it is entirely free. LynkDose is iPhone-only like Peppy, with reconstitution math, a heatmap, inventory with expiry tracking and Apple Health metrics such as HRV and sleep; a level chart is not mentioned on its site.

Where Peppy fits

Peppy's case is the catalog and the privacy model. The 123 built-in compounds each carry their form, default unit, typical frequency, a dose ladder where a label has one, and a half-life for the 62 that have a documented one, so setting up BPC-157 or Compounded Tirzepatide is a search rather than a form, and the "Active in your system" curve works without you entering any pharmacology. The calculator lives inside the protocol editor, warns when a draw will not fit the syringe, and is free. The 13-site body map rotates across all protocols, not per compound (see site rotation). Missed and upcoming doses are computed, so the calendar never duplicates. There is no account and no server; data lives on your iPhone and syncs through your own iCloud (see privacy).

What Peppy does not do, stated plainly: no Android, and no plan for one. No food, calorie or macro logging. No AI coach, no community, no bloodwork or labs, no iPad layout. Inventory, reminders, widgets, charts, cycles, step-ups, photos, export and a second active protocol are Pro, at $29.99 a year or $5.99 a week with a 7-day trial. If you want one app for shots and meals, pick from the first group. If you want the dose side done properly and privately, Peppy is built for that.

How to do this in Peppy

1. Install Peppy from the App Store. There is no sign-up; onboarding asks what you are taking and whether you want a reminder on shot day.
2. In the Protocols tab tap +, tap Choose under Compound, and search the catalog. Form, units and typical frequency fill in.
3. For a vial, use the inline Calculator: vial mg, water mL, dose. Peppy shows "Draw up N units". Always verify with your prescriber.
4. Set the schedule, pick a color, and save. The Today tab shows the countdown and the "Active in your system" curve.
5. On shot day, tap the dose on Today, tap the suggested site on the body map, and log. Do the daily check-in for weight and side effects.
6. After a week, open Calendar and Progress and decide whether the free tier covers you or whether reminders, charts and a second protocol are worth Pro.

Track it in Peppy

123 compounds built in, the units math done for you, body-map site rotation and reminders — private on your iPhone.

Free · iPhone · no account

Frequently asked

Not medical advice. Peppy is a tracking tool, not medical advice. Dose calculations are mathematical conversions only. Always follow your prescriber's instructions and verify every draw-up yourself.