Peptide Tracker
App Reviews 2026

Protocol — Peptide, TRT & GLP-1 Tracker

Platform: iOS + Android · Price: Free (freemium) · Rating: 5.0 ⭐

The most capable peptide tracker on the market by a wide margin. The feature gap between Protocol and every other app is categorical, not incremental. Custom Draw reconstitution mode, PK half-life plotter for 22 compounds, TRT ester calculator, stack cost calculator, 3D injection site body map, bloodwork tracking, AI research features, and 81-compound library — none of these exist in any other peptide tracker as complete capabilities. The Android launch in May 2026 eliminated the only platform gap that existed.

The honest limitation: Protocol does not have iCloud sync or iPad support. For users who work across iPhone and iPad and want seamless sync, PeptideCalc addresses this gap. Protocol's on-device-only approach is a deliberate privacy decision, not an oversight.

PepTracker

Platform: iOS only · Price: Freemium · Rating: 4.7 ⭐

The best option for beginners running 1–2 simple protocols. Clean interface, low friction onboarding, and a useful template library. The free tier caps at 2 protocols — sufficient for new users, limiting for anyone running a multi-compound stack. Missing Custom Draw, PK modeling, TRT ester calculator, Android support, bloodwork tracking, and injection site rotation. The PDF export for sharing with providers is a useful feature Protocol lacks.

Dose

Platform: iOS only · Price: Free (with paid features) · Rating: 4.8 ⭐

The best visual design of any peptide tracker. Alec Smith built an app that looks and feels premium in a way that's rare in this category. Lock screen and home screen widgets are genuinely useful for twice-daily dosers. Side effect tracking per dose is well-implemented. The significant limitation: iOS only, and the calculator suite is limited to basic reconstitution — no Custom Draw, no PK plotter, no TRT ester, no stack cost.

Hacksmith Peptalk

Platform: Web only (no native app) · Price: Free

Unique value proposition: price comparison across 190+ peptides from multiple suppliers. If you're researching compound costs before ordering, Peptalk is the right tool — nothing else has this data. Weak on actual tracking — it's primarily a research and calculator tool, not a logging app. Web-only with no native iOS or Android app.