Privacy Policy

Effective November 5, 2026

The short version

Twicy does not collect any data. There is no Twicy account, no server, no analytics, no advertising, and no tracking. Everything Twicy records and learns stays on your iPhone and Apple Watch. The only thing that leaves your devices is sentence text you send to the AI provider you choose, using your own key.

Audio

• While listening is on, your Apple Watch records audio and keeps only the parts where someone is speaking.
• Recordings are sent from your Apple Watch to your paired iPhone directly with Apple's WatchConnectivity. They do not go through iCloud or any Twicy server. After a recording reaches your iPhone, it is removed from the watch.
• Recordings are stored in Twicy's private storage on your iPhone.

Speech recognition

• Your recordings are transcribed on your iPhone using Apple's on-device speech recognition. The first time you use a language, iOS may download that language's speech model from Apple.
• When you practice, Twicy listens to the English you speak. By default this also runs on your iPhone only (Settings → On-device recognition only). If you turn that setting off, iOS may use Apple's speech recognition service for practice, under Apple's privacy policy.

Voice ID

If you set up Voice ID, Twicy builds a voiceprint from a short sample of your voice, computed on your iPhone with an on-device model. It is stored only on your iPhone and is used to keep sentences you said and drop sentences other people said. Sentences recognized as someone else's are not saved.

AI provider

• To turn what you said into learning cards, Twicy sends sentence text only (never audio, never your voiceprint) directly from your iPhone to the AI provider you configure, such as DeepSeek, OpenAI, or another OpenAI-compatible service.
• That provider processes the text under its own terms and privacy policy. Twicy has no relationship with these providers and receives nothing from them.
• Your API key is stored in the iPhone Keychain, available only on that device. It is sent only to the provider you configured.

Your sentences and progress

Your sentences, cards, and practice history are stored only on your iPhone. Settings are stored on your device. Nothing is synced to us.

Deleting your data

Deleting Twicy from your iPhone and Apple Watch deletes everything it stored, including recordings, sentences, practice history, and your voiceprint. To remove the API key from the Keychain before deleting, clear it in Settings.

Children

Twicy is not directed at children under 13 and does not knowingly collect any information from anyone.

Changes

If this policy changes, the new version will be posted on this page with a new effective date.

Contact

Questions: kyriecai.me@gmail.com