About the project

Penwise records doses, weight and how the body responds during GLP-1 treatment. The iOS and Android app works without an account or a server, and the data stays on the phone. The marketing website penwiseapp.com is available in five languages.

What Penwise does

Logs every dose, your weight and how your body responds.
Recognises 17 pens and five vial presets.
Connects to Apple Health and Health Connect.
Supports Apple Watch.
Produces summaries you can show to your doctor.

Supported medications

Mounjaro and Zepbound (tirzepatide): the KwikPen and the single-use pen, weekly dosing.
Ozempic and Wegovy (semaglutide): dial pens as well as single-dose and four-dose FlexTouch pens, weekly dosing.
Saxenda and Victoza (liraglutide): daily dosing.
Rybelsus (oral semaglutide): tablets with a tracked fasting window and no injection site.

Free and Penwise+

Free: logging injections (date, time, medication, dose, site, pain and notes) and oral doses, weight tracking with a trend, a body map that suggests the least recently used injection site, a calendar, a log of cravings and appetite, dose reminders and export to CSV or JSON.
Penwise+: estimated medication level curves, an Insights tab, nutrition and protein tracking, Apple Health and Health Connect sync, PDF reports for your doctor, import from the Shotsy app, a share card studio and colour themes including AMOLED black. The free trial lasts 14 days without a card.
The medication level estimate is based on absorption and elimination half-lives of semaglutide, tirzepatide and liraglutide.

Watches

Apple Watch and Wear OS are included at no extra cost. The watch shows the next dose and the streak, lets you log an injection from the wrist, and measures resting heart rate after an injection and saves it to the record. Watch face complications are available, and Wear OS also has a tile.

Who it is for

For people on GLP-1 treatment who want doses, weight and how the body responds written down on their phone, without creating an account or sending health data to a server.

Privacy

Penwise does not require an account, e-mail or password and has no server holding health data. The app contains no ad networks and no third-party analytics. Backups are encrypted on the device with the user's passphrase, and Penwise holds no keys. It is not a medical device.

Languages and platforms

The app is available on the App Store and on Google Play. The marketing website with guides for each medication runs in English, Slovak, Czech, Polish and German.