Lucca
Privacy · 12 October 2026
This page explains what Lucca collects, how it collects it, every service it shares it with and why, and how you can delete it.
Your voice
Lucca listens through your iPhone's microphone and turns your speech into text on the device. The sound is gone within seconds, and no recording is kept, by us or anyone else.
Twice, a few seconds of audio leave your phone: when you tell Lucca your name during setup, and when Lucca can't make out the name of a place you said. Each clip goes to OpenAI's transcription service, which returns the words and keeps nothing.
If you teach Lucca your voice, the voice profile is stored in your iPhone's Keychain and never leaves the device.
What Lucca sends to AI services, and to whom
Working out an answer takes more than a phone can do, so Lucca sends some of your data to the services below. Each one processes it only to provide its part of Lucca, and each is bound by its terms with us to protect it at least as well as this page describes. Lucca asks your permission during setup before any of this. Erase everything Lucca knows in Settings, or deleting the app, removes what he holds, and setup asks again.
- OpenAI
- What: the text of what you say and of what is said around you; what Lucca has learned about you; your neighbourhood or city, or a name you gave a place, such as Home; the names of your contacts and who they are to you; your calendar and mail text, when you connect them; your messages, when you pair your Mac and ask about them; and the two audio clips above.
- Why: to answer you, and to understand what is going on around you so Lucca knows when you are talking to it and when to stay quiet.
- Kept: up to 30 days, to monitor for abuse, then deleted, unless the law requires longer. Never used to train OpenAI's models. The transcription service keeps nothing.
- TypeSafe
- What: the text of what you say and of what is said around you, your name, Lucca's own recent lines, what came of your recent sentences, and what Lucca has noticed about the moment: who is in the room, the time, and what he can reach for you.
- Why: to tell whether you are talking to Lucca or to someone else, so Lucca knows when to answer and when to stay quiet.
- Kept: only as long as TypeSafe needs it to provide the service; it does not publish a fixed period. Never used to train TypeSafe's models.
- Google Places
- Your coordinates and what you're looking for, when you ask about places near you or their opening hours.
- Brave Search
- The words of a search, when an answer needs the web.
- SerpAPI
- Your city and the words of your question, when you ask what's on.
- Cloudflare
- Our relay. Every request above passes through it in transit. It records which service was called, whether the call worked, how long it took and the last six characters of your subscription's id, and never the content. We also keep daily totals of how much you use Lucca under that id, for up to 30 days, to plan capacity and pricing.
Nothing is sent to advertisers or data brokers.
Contacts
If you allow it, Lucca reads your contacts' names, nicknames, organisations, relationships (such as “brother”) and postal addresses. It never reads phone numbers or email addresses.
Names and relationships are sent as text to the AI services above, so Lucca knows who you mean. A contact's address is used only when you ask for directions to that person: it goes to Apple Maps for the route, to the AI services as part of the answer, and to Uber if you open a ride there. The AI services keep it no longer than described above.
Location
If you allow it, Lucca uses your location to give directions, find places near you and their hours, tell you the next train from the nearest station and when to leave for your next plan, notice when you've arrived at or left a place you planned to be, and learn where home is. Only while Lucca is listening, unless you also allow it in the background in Settings.
Your neighbourhood or city goes to the AI services as text. Your exact coordinates go only to Apple Maps, for directions and place names, and to Google Places, for a nearby search. The weather does not use your location.
Connected accounts
Gmail, Google Calendar and your Mac are read only after you connect them, and only to provide Lucca's features. Mail and calendar text goes to OpenAI to work out what matters to you, and so do the messages Lucca reads on your Mac when you ask about them. Lucca does not send messages or change your accounts without your approval, and you can disconnect any of them in Settings › Connectors.
What stays on your device
What Lucca learns about you, and recent conversation text, are stored on your device. An encrypted copy of what Lucca learns is kept in your own iCloud account, so it carries over to a new device.
Payments
Subscriptions are handled by Apple. We do not receive your name, payment card or billing address.
What we don't do
There is no Lucca account. We do not sell your data, show ads, or track you across other apps and websites.
Deleting your data
Conversation logs are deleted from your device automatically after 14 days. “Erase everything Lucca knows” in Settings deletes what Lucca knows, its conversation logs, the copy in your iCloud and your voice profile, and asks for your permission again the next time you set it up. You can also remove individual things it has learned. Deleting the app removes the data stored on that device. Cancel your subscription separately in your Apple Account settings.
Children
Lucca is not intended for children under 13.
Changes
When this policy changes, the date above changes with it.
Credits
Lucca's voice is azelma, from Kyutai's Pocket TTS, modified (CC BY 4.0). Voice matching uses WeSpeaker, modified (CC BY 4.0), through a Core ML conversion (MIT).
Contact
Reach us through the support page.