The short version: Wordbrush collects nothing about you. Everything happens on your device. This is true under every applicable privacy regime, GDPR, CCPA, PIPL, because there is no personal data flowing anywhere we could be a data controller of.
Nothing. We don't ask for your name, email, phone number, age, contacts, photos, microphone, or calendar.
Wordbrush will ask for your location only if you choose to turn on smart-commute reminders, an optional feature that nudges you to study when you arrive at a spot you pin yourself (e.g. the station near home). The coordinate is held on your device and registered with the operating system as a geofence; it is never read or transmitted by us. Turn the reminder mode off and the coordinate is discarded.
On Android 13+, Wordbrush will also ask for permission to post notifications. This is only used to fire the daily reminder you configure in the app. We never send marketing notifications, and there is no server that could push anything to your device.
Your review history, which cards you've seen, when you saw them, how you rated them, when they're next due, is stored locally inside the app's private storage on your device (SwiftData on iOS, Room on Android). The operating system encrypts this storage at rest the same way it does for every app's local data.
Wordbrush never reads or transmits this data anywhere. There is no Wordbrush server.
Nothing during normal use. The app makes no network calls during a study session. Every word, every audio recording, every example sentence, every radical breakdown is bundled into the app at install time and stays on your device.
The audio recordings shipped inside the app were pre-generated using Google Cloud's Text-to-Speech service at content-build time, before the app was distributed. The app itself never calls Google or any other service at runtime.
If you opt in to share diagnostics with developers, the platform may share anonymized crash reports with us. On iOS this lives at Settings → Privacy & Security → Analytics & Improvements → Share With App Developers; on Android, at Settings → Google → Usage & diagnostics. We use the reports only to fix the bug that crashed your session. They contain no personal information.
None. Wordbrush does not implement any tracking, advertising, or analytics SDKs. No cookies. No identifiers. No fingerprinting. On iOS, NSPrivacyTracking is declared false in the app's privacy manifest (PrivacyInfo.xcprivacy) which Apple validates at submission. On Android, the same posture is reflected in the Google Play Data Safety form: no data collected, no data shared.
These regulations give you rights, access, correction, deletion, portability, the right to know what's collected, and so on, over personal data that a company holds about you. Since we hold no personal data about you, there is nothing for us to access, correct, delete, or hand over. You are welcome to delete the app from your device, which immediately erases the entire local history. There is no remote copy.
Wordbrush is suitable for all ages. We don't collect data from anyone, including children.
If Wordbrush ever starts collecting any data, even for a syncing feature, this page will be updated and the change will be highlighted at the top of the app on the first launch after the change ships.
Questions, concerns, or feedback:
Urban Algorithm, LLC
30 N Gould Street, Ste 3248
Sheridan, WY 82801, USA
urbanalgorithm.com/#contact