At a glance
| Feature | Peptide Protocol | Shotsy |
|---|---|---|
| Scope | GLP-1 + healing + GH axis + research peptides (29 indexed) | GLP-1 only |
| Platform | iPhone + free web tools | iOS + Android |
| Dose scheduling | Yes | Yes |
| Side-effects calendar | Daily log + correlated trends | Strong feature |
| Reconstitution calculator | YesFor compounded GLP-1 or any peptide | Not needed (pens) |
| Dose converter (mcg/mg/IU) | Free on web | Not relevant |
| Half-life visualizer | Yes | No |
| Injection site rotation (body map) | Yes | Yes |
| Peptide reference library | 29+ peptides | Not applicable |
| Stacks / combinations | 7 stacks | Not applicable |
| Price | Freemium | Free with Premium |
Feature comparison reflects public information as of April 2026. Check each app's listing for the most current feature list.
Where Peptide Protocol is stronger
Covers every peptide you might run
Shotsy is purpose-built for injectable GLP-1 pens (Mounjaro, Zepbound, Wegovy). The moment you add BPC-157, Tesamorelin, or compounded semaglutide to the mix, you need a tracker built for research peptides. That's us.
Compounded GLP-1 support
If you're using compounded semaglutide or tirzepatide from a 503A pharmacy, you need a reconstitution calculator — something Shotsy doesn't build because it assumes pen devices. Peptide Protocol handles both pens and compounded vials.
Peptide reference content
Our glossary, guides, and regulatory page cover all peptides, not just GLP-1.
Where Shotsy is stronger
Scale and polish for GLP-1 users
Shotsy has 600K+ downloads and years of iteration specifically for pen-device GLP-1 tracking. If you're only on Ozempic/Wegovy/Mounjaro, it's an excellent fit.
Android availability
Shotsy runs on Android; Peptide Protocol is iPhone-only today.
Which to pick
Pick Peptide Protocol if…
You run any peptide beyond the three approved GLP-1 pens, you use compounded GLP-1 (vials, not pens), or you want a tracker that grows with you if your protocol expands.
Pick Shotsy if…
You exclusively use Mounjaro, Zepbound, or Wegovy pens, you're on Android, and you want the most-downloaded app in that narrow category.
How this page is maintained
This comparison is written by the Peptide Protocol team and is inherently biased toward our own strengths — we try to be fair about Shotsy's, but the honest way to evaluate is to try both when possible. We update this page when feature sets change. If you spot something that has changed on either side, tell us.