Privacy

trueline.balistic.org · last updated 26 September 2026

Your profiles stay in your browser. Nothing about them reaches the server unless you turn on Sync. The Android app has its own policy.

The website

The solver runs in your browser. The server sends the page and the cartridge sheets you open, and that is all it does unless you sign in.

Your profiles are kept in your browser, not on the server. Clearing site data removes them.
Location is read only when you press one of the Use location buttons, and only to fill in the altitude or latitude box. The position is used to fill the box and then discarded.
Sync is optional and off unless you create an account. If you do, the profiles you sync are stored on the server so another device can fetch them, along with the username and the PIN as a PBKDF2-HMAC-SHA256 hash with a per-user salt, never the PIN itself. No email address is asked for or held.
Failed sign-ins and new accounts are counted by IP address for fifteen minutes, to stop people guessing PINs, and then deleted.
The web server keeps ordinary access logs — the usual request records any web server writes. They are not used to build a profile of anyone and are not shared.
The site is served through Cloudflare, which handles each request on its way to the server, as any host's network does.
Send feedback in Settings opens your own mail app with a draft. Under what you type, it holds the site build, your browser, and the load and conditions on screen, including a latitude if you entered one. You can read, edit or delete any of it. Nothing goes anywhere unless you send it from your mail app. If you do, we receive your email address and the message, and use them only to reply and fix the problem.
No analytics and no advertising.

What is never done

Nothing is sold, rented or shared with anyone, and no data is used for advertising or profiling. There is no tracking across other apps or websites.

Children

Trueline is a technical tool for shooters and is not directed at children.

Changes

If this policy changes the date above changes with it.

Contact

Questions about this policy, or about anything the website does with your data: truelinebalistic@proton.me. That address is also where bug reports go.