Pepti vs Shotsy: which tracker fits your GLP-1 setup?

By Tessaro Pty Ltd, the maker of Pepti · Reviewed September 2026

This comparison is written by the maker of Pepti, one of the two apps. The Shotsy facts below come from its own website and App Store listing as read in September 2026; products change, so verify current details on Shotsy's own pages. We have credited Shotsy for what it does better than us and stated our own limits plainly, and every Shotsy claim is dated and points to a public page you can open yourself.

The comparison

Where Shotsy is stronger

Shotsy is purpose-built for branded GLP-1 pens and pills — it can also log compounded doses, though without reconstitution math — and that focus is its advantage. It is free to start, runs on both iOS and Android, and syncs across your devices via Apple's private iCloud (Sep 2026). It charts estimated medication levels over time, described as based on peer-reviewed clinical data (Sep 2026), and wraps a broad weight-and-side-effect tracking flow around a single medication rather than a multi-compound stack. For someone on one prefilled product who wants a clean, focused log, that is exactly the right shape.

Said plainly: if you inject from a prefilled pen, Shotsy is the more focused tool, and Pepti's reconstitution math is capability you would never use. Buying a vial-oriented app for a pen-based routine is paying for the wrong thing. It is free to download and freemium; its App Store listing shows prices from about $9.99–$19.99/mo and $39.99–$59.99/yr (Oct 2026), though its marketing site lists none.

Where Pepti is stronger

Pepti is built for the other supply form: compounded vials and research peptides. Its reconstitution and draw-volume math turns vial size and diluent into a draw volume and U-100 syringe units, its coverage extends beyond GLP-1s to a wider set of peptides, and its evidence pages cite their sources with PubMed links and honest counts. It holds a strict no-dosing design and a single flat price with nothing gated behind a tier.

On data handling, Pepti has no account, no sign-up and no cloud sync, and your protocol and health data stay on the device — with one stated exception: the optional AI coach sends that conversation to Pepti's server. Try the free reconstitution calculator or read a cited compound page such as semaglutide to see the difference in approach.

Where they are close

Some axes will not separate these two. Both offer injection-site rotation, both chart levels over time, and both make on-device data claims — Shotsy via Apple's private iCloud, Pepti by keeping data local apart from the optional coach conversation. If those were your only criteria, either would do. The real fork is the one in the answer box: what you inject from. Pens and pills point to Shotsy; compounded vials point to Pepti.

That overlap is worth stating because feature-count comparisons tend to obscure it. On a spec sheet, both apps track injections, chart levels over time, and keep data on the device, and you could conclude they are interchangeable. They are not — but the difference sits upstream of the feature list, in what each app assumes you are putting in the syringe. Read the table above with that lens and the rows sort themselves into the ones that matter for you.

How to tell which one you need

If you are not sure which camp you are in, the test is simple: look at what is in your hand before an injection. A prefilled pen or an oral dose means the concentration is fixed by the manufacturer, there is no mixing step, and a tracker like Shotsy that assumes a known product is the natural fit. A vial of powder, or a compounded vial you draw from, means you first have to work out concentration and draw volume — and that is the step Pepti is built around. Neither is more advanced than the other; they answer different questions, and matching the app to your supply form matters more than any single feature either one adds.

Who should pick which

There is no single winner here, only a fit. In short:

For the wider field, see how Pepti compares to other trackers, learn what a peptide tracking app does, or read more about the Pepti peptide tracker.

Common questions

Does Shotsy have a reconstitution calculator?

No: Shotsy logs branded pens and pills and also compounded semaglutide or tirzepatide as custom doses, but it does not include a reconstitution/draw-volume calculator (Sep 2026). If you draw from a vial you have reconstituted, you need an app that does that math; Pepti does.

Which is better for compounded semaglutide or tirzepatide?

Pepti, for a practical reason rather than a dosing one: compounded vials need reconstitution and draw-volume math, and Shotsy does not offer that (Sep 2026). Neither app tells you what to take; Pepti converts a figure you already have into a draw volume and syringe units.

Is Shotsy free?

Shotsy is free to download and freemium; its App Store listing shows prices from about $9.99–$19.99/mo and $39.99–$59.99/yr (Oct 2026), though its marketing site lists none. Check Shotsy's own listing for the current figure.

Can I use Pepti on Android?

No. Pepti is iOS only, requiring iOS 17.2 or later. Shotsy runs on both iOS and Android (Sep 2026), so if you are on Android it is the option here that fits.

Does either tell you what dose to take?

Pepti does not, anywhere, by design: you enter the figure you already have and it does the arithmetic. Shotsy's dosing-content stance was not assessed for this page; check its own pages (Sep 2026). Neither app's content is medical advice.

Both apps are actively maintained and both do their own job well. If this page has done its work, it has replaced “which tracker has more features” with the question that actually decides it — pens and pills, or vials you reconstitute — and pointed each one at the app built for it.

Not medical advice. Pepti is a record-keeping and measurement tool, not a medical device.

Pepti