At a glance
| Feature | Peptide Protocol | PeptideKit |
|---|---|---|
| Platform | iPhone (native SwiftUI), web tools | iOS + iPadOS |
| Peptide reference library | 29+ peptidesIndexed glossary on web — free | GLP-1 focused |
| Dose scheduling | YesPer-protocol cadence + site rotation | Yes |
| Reconstitution calculator | YesIn-app + free web version | Yes |
| Dose converter (mcg/mg/IU) | YesFree on web | Partial |
| Half-life visualizer | YesInteractive chart, free | No |
| Injection site rotation (body map) | Yes | List-based |
| Stacks / combination guides | 7 editorial stacksFree on web | Not available |
| AI chat assistant | Not offered — we publish researched guides instead | Yes |
| Free public tools (no sign-up) | Yes3 calculators open on the web | App-only |
| Education and guides | 4 pillar guides + glossary + regulatory page | Minimal |
| Price | Freemium | $7.99/mo or $69.99 lifetime |
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
Breadth beyond GLP-1
Peptide Protocol covers healing (BPC-157, TB-500, GHK-Cu), the GH axis (CJC-1295, Ipamorelin, Sermorelin), GLP-1/GIP agents, and 20+ more. PeptideKit is built around Mounjaro/Wegovy/Zepbound users — great if that's all you run, limiting otherwise.
Free public tools
Our reconstitution calculator, dose converter, and half-life visualizer are free on the web, shareable by URL. PeptideKit's tools live only inside a paid app.
Researched reference, not AI chat
We publish reviewed glossary entries with inline citations and a medical review process. PeptideKit leans on an AI assistant — convenient, but less verifiable for YMYL decisions.
Where PeptideKit is stronger
AI-chat convenience
If you want conversational Q&A inside the app, PeptideKit's chat is its headline feature. We don't ship one.
Lifetime pricing
PeptideKit offers a $69.99 lifetime unlock. If you prefer a one-time payment, that's competitive.
Which to pick
Pick Peptide Protocol if…
You want broad peptide coverage (not just GLP-1), free web calculators, and researched reference content — and you're on iPhone.
Pick PeptideKit if…
You exclusively run Mounjaro/Wegovy/Zepbound and specifically want an in-app AI chat assistant.
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 PeptideKit'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.