Privacy Policy

// 1.Summary

BalTrak does not collect personal data. All ballistic calculations and storage happen locally on your device. The app makes one optional network request to zerotests.dev to refresh the built-in bullet and profile catalog (described in section 5). This request is user-controllable and can be disabled.

// 2.Data stored on the device

The app stores only on your device:

• Custom bullets — entries you manually add through the bullet editor.
• Shooting profiles — rifle, optic, sight height, zero distance, click pattern, BC correction, twist rate.
• Display preferences — language, font scale, chart mode (turret / line).

Data is kept in a local SQLite database inside the app's private folder (Android/data/dev.zerotests.baltrak/) and is never transmitted anywhere.

// 3.Device permissions

• Internet: used only for the optional catalog refresh (section 5) and the donate link. All ballistic calculations work fully offline.
• Storage: access to the app's private folder (SQLite database, PDF export).
• Other: no other permissions (no camera, location, contacts, microphone, …).

// 4.Donations and external links

The "Support development" feature opens ko-fi.com/zerotests in the external browser. The transaction and related data are subject to Ko-fi's own privacy policy (ko-fi.com/manage/privacy). Zero Tests does not receive copies of payment details (card numbers, bank accounts, etc.), only a list of supporters with their chosen Ko-fi display name in the Ko-fi dashboard.

// 5.Built-in catalog refresh (optional)

BalTrak ships with a bundled catalog of bullets and rifle profiles. Optionally, the app can download the latest version of this catalog from https://zerotests.dev/BalTrak/data/. When this happens:

• The request includes your IP address (visible to the server via TCP) and standard HTTP headers (User-Agent, Accept-Language). Server access logs are kept by the hosting provider for routine availability monitoring.
• No app-generated identifiers, account information, profile contents, or usage data are transmitted. The server cannot tell who you are or which bullets you have added.
• You control this in Settings → Data catalog: "Automatic refresh" toggle (checks every 7 days). On first launch the app asks whether to refresh; subsequent runs honor your choice. Setting the toggle to off disables all outgoing requests.
• The downloaded catalog is verified by SHA-256 hashes published in a small manifest.json alongside the data, to prevent partial or corrupted downloads.

// 6.Analytics, ads, third-party SDKs

BalTrak does not use Google Analytics, Firebase Analytics, Crashlytics, Facebook SDK, AppsFlyer or any other analytics or advertising platform. The app contains no ads.

// 7.Children's data

The app is not intended for users under 18. Users must be of legal age and have the right to handle firearms under applicable local law.

// 8.Data export and deletion

Users can at any time:

• Export their bullets to a JSON file ("Export JSON" in the bullet editor).
• Delete individual profiles or bullets through the UI.
• Remove all data by uninstalling the app.

// 9.Policy changes

Any changes to this policy will be published on this page with a new update date. Material changes will also be announced in the app's release notes.

// 10.Contact

Privacy questions:

• Email: info@zerotests.dev
• Website: zerotests.dev