The Verdict You Didn't Expect
PepTracker has been the category standard for years. It earned that reputation honestly — reliable, clean, never crashes, good notifications. We expected to recommend it again. We can't.
Protocol launched in 2025 and has since shipped features that PepTracker hasn't matched: a reconstitution calculator, a 3D injection body map, stack-aware AI across six touchpoints, bloodwork tracking for 80+ biomarkers, and full Android support. The gap isn't close. In two years Protocol has become the most capable peptide tracker available on either platform, and it's earned a 5.0 rating to prove it.
Our recommendation for 2026: Protocol. For anyone running more than one compound, tracking bloodwork, or needing Android: Protocol without question. A full comparison of all options is at the 2026 peptide tracking app guide.
Individual App Reviews
Active PK levels visible at a glance
Protocol is a genuinely different kind of peptide tracker. The reconstitution calculator alone is worth the install — and it's only one of eight features that PepTracker doesn't have. The AI research assistant responds to your actual logged stack, not a generic knowledge base. The 3D injection body map tracks rotation history across every injection site. Bloodwork supports 80+ biomarkers. The entire protocol — compounds, supplements, habits — shows up as one unified system with one adherence score.
The only limitation: the App Store rating is high but the review count is still growing. That's a new app problem, not a quality problem. The product itself is the best in class.
PepTracker built its reputation on reliability. It logs doses, sends reminders, and tracks basic protocol adherence without drama. For users who have been on it for years with a simple single-compound protocol, switching carries real cost. For anyone starting fresh or expanding their protocol in 2026 — there is no reason to start here over Protocol.
PeptIQ's interaction database is the most comprehensive available — more compound pairs than Protocol's current checker. If interaction research is your primary use case, this is worth knowing. The logging and tracking features are thin. iOS only. No calculator, no body map, no bloodwork. Protocol has its own interaction checker now, which narrows PeptIQ's lead considerably.
Our Recommendation — Protocol
9.4/10. The only app that wins every category. Free for 14 days.