_Last updated: 15 June 2026_
Systa: Learn System Design is an offline-first Android application for learning system design. This policy explains what data the app handles.
Systa does not collect, transmit, or share any personal data. The app works offline. Everything you do — progress, streaks, quiz scores, settings — is stored only on your device.
The app saves the following locally (Android DataStore / app storage) and never sends it anywhere:
Learning progress, quiz scores, streaks, and achievements
App settings (theme, accent color, font, text size, language)
Your Pro entitlement status (whether you purchased the unlock)
This data is removed when you uninstall the app or clear its storage.
systa offers a one-time "Pro" unlock through Google Play Billing, Payments are processed entirely by Google Play — the app never sees or stores your payment details. Your purchase status is provided by Google Play and cached locally so the app works offline. See Google's Privacy Policy: https://policies.google.com/privacy
With your permission, the app may schedule local reminder notifications to help you keep your learning streak. These are generated on your device. No notification data leaves your device, and no push service is used.
No accounts, sign-in, names, or email addresses
No analytics or tracking
No advertising or ad identifiers
No location, contacts, photos, or device identifiers
No personal data transmitted to any server
systa is a general-audience educational app and is not directed at children under 13. It collects no personal data from anyone.
If this policy changes, the updated version will be posted at this URL with a new "Last updated" date.
If you have any questions or concerns about this Privacy Policy, you can contact us at:
Faith Devs
Email: faithdevsinfo@gmail.com