Privacy Policy

Last updated: 25 October 2026

Overview

Izwi ("the App") is developed by Stewart Burton ("we", "us"). We take your privacy seriously. This policy explains what data the App collects and how it is used, on both iOS and Android.

Data We Collect

Izwi does not require an account or collect behavioural usage data.

The dictionary, your saved words, and pronunciation audio work on your device. We do not operate a login server or use advertising tracking. If the App crashes or hits an unexpected error, it sends the technical diagnostics described below to Sentry.

Data Stored on Your Device

The App stores the following data locally on your device using standard iOS and Android storage mechanisms:

• Preferences: Your selected region, theme lens, appearance, and maturity filter settings
• Favourites, streaks and history: Words you have saved, your daily streak, and the words shown on previous days
• Widget data: The current daily word is written to a shared App Group container (iOS) or app-local storage (Android) so the home-screen widgets can display it
• Subscription state: Whether Izwi Pro is active is cached in the device keychain/keystore; the source of truth remains Apple or Google
• Sign in with Apple (optional, iOS): If you choose to link your account for subscription recovery, the identifier Apple returns, plus the name and email address you choose to share on the Apple sign-in sheet, are stored only on your device and never sent to us

This data never leaves your device and is not transmitted to any server of ours - we don't operate one.

Third-Party Services

• Crash reporting (Sentry): If the App crashes or hits an unexpected error, an automated technical report (stack trace, device model, OS version, app version) is sent to Sentry so we can fix the problem. These reports contain no names, no email addresses, no account identifiers, and no content of what you typed or saved. Sentry's privacy policy: sentry.io/privacy
• Purchases (Apple / Google): Izwi Pro subscriptions are processed entirely by the App Store or Google Play. We never see your payment details.

Pronunciation audio is bundled with the App and plays offline - no audio service is contacted at runtime. We do not use behavioural analytics, advertising, or tracking SDKs. Sentry is used only for the crash diagnostics described above.

Data Sharing

We do not sell data or share it for advertising. The data that can leave your device is a technical crash report sent to Sentry, purchase information handled by Apple or Google, and content you explicitly choose to share (for example, a word card sent through the system share sheet).

Children's Privacy

The App does not knowingly collect information from children under 13. It requires no account and uses no advertising tracking.

Changes to This Policy

We may update this policy from time to time. Any changes will be posted on this page with an updated revision date.

Contact

If you have questions about this policy, contact us at:
ai@stewart-burton.com