Privacy
Last updated 8 August 2026
Peptimark is built to keep your data on your device. This page says exactly what is stored, where, and the cases in which something leaves your phone.
What stays on your device
Your vials, doses, reminders and settings are stored in your browser on this device. Peptimark works with no connection at all, and the dose calculation never sends anything anywhere.
The two photo features are what leave your phone
Peptimark can read a photo of your syringe, and a photo of your vial label. In both cases that single image is sent to Anthropic, an external service, so the text on it can be read back to you. The image is used for that one reply and is not stored by Peptimark: no copy is written to disk, to a database, or to any log. If you never take a photo, no image is ever sent. Both features are optional, and everything they fill in you can type yourself, including with no connection.
What we do not do
Peptimark has no analytics, no advertising, and no third-party trackers. Nothing you enter is sold or shared. No name, email or address is required to use the calculator.
If you sign in
Signing in is optional and exists so your data can move between your own devices. When it is switched on, your entries are stored under your account and are visible only to you. Without signing in, Peptimark keeps everything locally and never uploads it.
Your data is yours
You can export everything as a JSON file, and you can erase everything from this device, both from the Account screen and both in two taps. Erasing is immediate and cannot be undone.
Children
Peptimark is for adults. You must be 18 or older to use it.
Questions
Write to privacy@peptimark.app.