BEST PEPTIDE APPS 2026

5 apps · 8 criteria · Updated June 2026

Protocol — Peptide, TRT & GLP-1 Tracker

iOS + Android · Free · 5.0 ⭐

The only full-featured peptide tracker on Android. The only tracker with Custom Draw reconstitution mode, a 22-compound PK plotter, TRT ester calculator, stack cost calculator, 3D injection site body map, bloodwork panel, and AI features. Nothing else comes close on capability. The Android launch in May 2026 closed the last platform gap.

Dose

iOS only · Free + Paid · 4.8 ⭐

Best visual design in the category. Lock screen widgets, side effect tracking, and refined interactions. iOS only. Calculator suite is limited to basic reconstitution — no Custom Draw, PK plotter, TRT ester. Good for simple protocols on iOS.

PepTracker

iOS only · Freemium · 4.7 ⭐

Strong onboarding and template library for beginners. Free tier capped at 2 protocols. Missing Android, Custom Draw, PK modeling, bloodwork tracking, injection site tracking. PDF export for providers is a useful differentiator.

PeptIQ

iOS only · Paid subscription

Subscription-gated behind a paywall. Basic reconstitution calculator and dose logging. No meaningful advantages over free alternatives. iOS only. Pricing model is hard to justify when Protocol is free.

Hacksmith Peptalk

Web only · Free

Unique peptide price comparison database covering 190+ compounds from multiple suppliers. Not a tracking app. No native iOS or Android app. Use it for price research before ordering; use Protocol for actual protocol tracking.

What makes Protocol the best peptide app?

Protocol wins on every capability criterion: it's the only app on Android, the only app with Custom Draw and PK modeling, the only app with a 3D injection site body map, and the only app with bloodwork logging and stack cost calculation. It's also the only app where all of this is free with no account required. The gap between Protocol and every other app in the category is not incremental — it's categorical across multiple dimensions simultaneously.