Privacy Policy
Last updated: March 2026
Overview
This app is designed to be fully offline. No personal data is collected, transmitted, or stored on any servers.
Data stored on your device
Progress, answers, and learning history are stored locally on your device using SQLite. This data never leaves your device unless you explicitly use optional sync features (e.g., connecting to a local dashboard on your own network).
There is no cloud account that backs up this progress. Deleting the app, reinstalling without restoring app data, or moving to a new device without a transfer that includes this app’s data typically means XP, streaks, and history do not carry over. See Support for details.
Third-party services
This app does not use analytics, advertising, or behavioral tracking. If you optionally connect a wallet to submit on-chain feedback, that path uses wallet-connection software (e.g. WalletConnect); transactions and addresses are visible on public blockchains like any other wallet interaction.
Contact
For questions about this policy, email ZeroDayDevApp@proton.me or use the App Store listing.