This app collects nothing.
None. The app has no accounts, no sign-in, no analytics, no advertising identifiers, no crash reporting, and no third-party SDKs of any kind. It makes no network requests. It does not know who you are and has no way to tell us anything about you.
Which words you have studied and when they are due for review is stored in a file inside the app's own private container on your device. It is never transmitted anywhere. Deleting the app deletes it. There is also a Reset all progress button in the app's Settings.
The optional speaking drill records your voice so iOS can check your pronunciation. Audio is passed to Apple's on-device speech recogniser and discarded immediately; nothing is stored and nothing is uploaded by this app. You can decline microphone access, or switch the drill off in Settings, and the app remains fully usable.
The app requests speech recognition so it can score what you say, using on-device recognition wherever iOS supports it. Apple's handling of speech data is governed by Apple's own privacy policy.
The app collects no data from anyone, including children.
If this policy ever changes, the updated version will be posted at this address with a new date.
Questions, bugs, or a word you think is wrong: austinshin219@gmail.com
The app will only ever speak with a Taiwanese accent, so it needs a Chinese (Taiwan) voice installed. On iOS: Settings › Accessibility › Spoken Content › Voices › Chinese › 中文（台灣）. Download it once and the app works offline from then on.