Private records, on your iPhone

Your doses and blood work, in one logbook.

Record prescribed testosterone doses, follow the markers you choose, and view an estimated level curve between blood draws. A record and visualisation, never a measurement or dosing tool.

App Store release in preparation See how it works

Illustrative estimated curve

Modelled from recorded doses

Example only, not a measurement

TRT Logbook shows modelled estimates inside an uncertainty range and explains the published sources and known limitations.

How it works

A durable record, with the model kept in context.

Record

Keep each dose, protocol period, site and time. Local reminders follow the schedule you entered without naming its purpose on the lock screen.

Visualise

See an estimated curve drawn from published pharmacokinetic data, always labelled as a model rather than a measured result.

Compare

Enter or import blood work and follow selected markers. With permission, confirmed results can personalize the estimated curve.

Privacy

Your records stay on your device.

TRT Logbook has no account, server, advertising SDK or health-data upload. Lab report recognition runs on your iPhone, and Apple Health access is read-only.

No analytics or tracking in the app
No copy of an imported report is retained
No push-notification service
CSV data leaves only when you export it

Read the privacy policy

TRT Logbook

A record and visualisation, not a dosing tool.

Estimated levels do not replace blood work or medical advice. Your prescriber decides your protocol.