Protocol is the only TRT tracking app available on Android as of June 2026. Injection logging, bloodwork panel tracking, ester calculator, and injection site rotation — all on Android.
Before Protocol's Android launch in May 2026, TRT users on Android had no native tracking option. Every app built for testosterone protocol management — including the few that advertised TRT-specific features — was iOS only. Android TRT users tracked in spreadsheets or the Notes app, without access to built-in reconstitution math, bloodwork logging, or ester calculation.
Protocol changed this. The Android app includes the full TRT-specific feature set: injection logging with ester type, injection site rotation across bilateral IM zones (gluteal, deltoid, vastus lateralis), the TRT ester calculator (free testosterone content per labeled dose across 6 esters), bloodwork panel logging for the full TRT panel, and the PK half-life plotter for testosterone ester concentration modeling. All free. All on Android.
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