Privacy
Trueline for Android · last updated 26 September 2026
The Android app collects nothing and never sends anything on its own.
It requests no network permission at all, which you can check for yourself in
Android's app info screen: the only permission it asks for is location, and
only when you press Use location.
The Android app
Everything it needs is inside the download. The bullet library, the drag
models and the cartridge dimensions are all bundled, so the app works with the
phone in airplane mode and never contacts a server, including ours.
- No accounts. There is nothing to sign in to.
- No analytics, no crash reporting, no advertising, and no
third-party code that collects anything.
- Your loads, rifles and recorded dope stay on the device, in the
browser storage Android gives the app. Nothing is uploaded. Uninstalling
removes them, so use Export JSON if you want a copy you control.
- 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. Decline the permission and both
fields still work: you type the numbers.
- Send feedback in Settings opens your own mail app with a draft.
Under what you type, it holds the app version, your phone model and Android
version, 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.
What is never done
Nothing is sold, rented or shared with anyone. There are no third-party
services in the app, 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.
It collects nothing from anyone, of any age.
Changes
If this policy changes the date above changes with it. Since the app carries
no network permission, an existing install cannot be altered after the fact:
a change means a new version you choose to install.
Contact
Questions about this policy, or about anything the app does with your data:
truelinebalistic@proton.me.
That address is also where bug reports go.