Boutmark — Privacy Policy

Last updated: 7 October 2026

Boutmark is a personal fencing logbook. It works fully on your device; an account is optional.

What the app stores

Everything you enter — bouts, touches, tags, notes, match sheets, opponents and settings — is stored in a database on your device.

If you sign in, the same training data is also stored with your account so it can sync between your devices (see Sync). Without an account, nothing leaves your device.

What we collect

Nothing, unless you create an account.

If you sign in (Settings → Account) with Apple, Google or an email code, we store your email address and an account ID with our provider, Supabase (servers in London, UK). If you sign in with Google, Google also shares your name and profile picture link, which are stored with your account; we don't use them. If you use Sign in with Apple, we also store a token Apple gives us so we can revoke the sign-in when you delete your account. If you sign in with an email code, your email address is passed to our email delivery provider, Resend, solely to send you the code.

Sync

When you're signed in, your training data — bouts (including each bout's offset from UTC, such as +01:00, so dates show as you saw them; we never collect your location), touches, tags, notes, match sheets, opponents, and your default weapon and season start — is stored with your account on Supabase (London, UK) and synced to the other devices you sign in on. Each of your devices gets a random ID, created by the app, which is stored with your edits so changes from different devices merge in the right order; it isn't linked to your phone's hardware or advertising IDs. It is all encrypted in transit and at rest, and used only to keep your devices in sync. Theme and other display preferences stay on each device. There are no analytics, no advertising and no tracking, and we don't share or sell your data. You can also view and edit this data at boutmark.com when you sign in there with the same account.

Opponents

Details you record about other fencers (names, handedness, birth year, country, height, grip and school, notes and match sheets) are your private training notes. They are visible only to you, kept only on your devices and in your account, and never shared or published. Please keep them to what you need for your own training.

Reports and exports

Settings → Export data creates a backup file and opens your device's share sheet. The file goes only where you send it (for example Files, AirDrop or email). We never receive it.

Reports (coaching handout, competition review, opponent scouting, season review) are made on your phone, or in your browser from your own account, and saved as a PDF only when you choose. Like exports, they are files you create and share yourself. Boutmark stores nothing about them and collects no new data to make them.

Deleting your data

Deleting a bout removes it from the app, and from your other devices when they sync. Deleted items are kept, hidden, in your account (that's how your other devices learn about the deletion) until you delete your account. Settings → Account → Delete account deletes your account and everything stored with it online — including all synced training data — immediately; you can also choose to erase the data on your phone. Signing out keeps the data on your phone. Uninstalling Boutmark deletes all of its data from that device.

Full instructions, including how to ask us to delete your account if you no longer have the app: https://boutmark.com/delete-account.

Children

Boutmark is not directed at children under 13 and does not knowingly collect personal information from children.

Changes

If this policy changes, the updated version will be published at this address with a new date.

Contact

Questions about this policy: [email protected]