At a glance
| Feature | Peptide Protocol | PepTracker |
|---|---|---|
| Platform | iPhone + free web tools | iOS |
| Dose scheduling and reminders | Yes, per-protocol cadence | Yes |
| Protocol templates | Starter templates + custom | Yes |
| Visual syringe preview | Live on the calculator | In-app |
| Reconstitution calculator | Free web + in-app | Premium |
| Dose converter (mcg/mg/IU) | Free on web | Partial |
| Half-life visualizer | Free on web | Not available |
| Peptide reference library | 29+ peptides, free glossary | Limited |
| Stacks / editorial combination guides | 7 stacks | Not available |
| Pillar guides | 4 guidesreconstitution, injection, storage, syringes | Not published |
| Free tier usefulness | Most free — core calculators and reference open | Most features behind premium |
| Price | Freemium | $4.99/mo or $59.88/yr |
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
More actually free
PepTracker gates most features behind premium — the free tier is limited. Peptide Protocol opens the reconstitution calculator, dose converter, half-life visualizer, glossary, stacks, and guides on the web at no cost.
Researched reference material
We publish a 29-peptide glossary, four pillar guides, seven editorial stacks, and a regulatory page. PepTracker keeps everything in-app.
Web-shareable tool state
Our calculator URLs carry your inputs so you can share a specific calculation. Useful for forum posts and questions.
Where PepTracker is stronger
Clean, focused interface
PepTracker's "just the scheduler" scope keeps the UI tight. If you want less app and more reminder, it's clean.
Existing users
If you're already on PepTracker's annual plan, switching costs real effort.
Which to pick
Pick Peptide Protocol if…
You want free web calculators, researched reference content, and editorial stack guides in addition to scheduling — and you're on iPhone.
Pick PepTracker if…
You want a minimal scheduling-only app and don't need external reference or free web tools.
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 PepTracker'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.