Privacy policy

Version of 30 October 2026 · Terms of use

Coucou is an app to practise languages by talking with Camille, an AI character (not a person). This page explains, in plain words, what we keep about you, why, who helps us, and what you can do about it.

1. Who is responsible

Coucou is a personal project run by Eduardo, in Brazil. He decides how your data is used (under Brazil's LGPD he is the "controlador"; under the EU's GDPR, the "controller"). Coucou is invitation-only and for adults (18+).

Contact: in the app, Settings → Account & privacy → Write to us. Your message goes straight to Eduardo. We answer within 15 days.

2. What we keep and why

What	Why
Account: first name, app language, time zone, language level, your settings, and when you agreed to this page	To run your account (the service you asked for)
Conversations: what you say in calls and in the chat (voice and text) and Camille's replies	So Camille can talk with you
Memory: a short summary of past talks, things you told her, your common mistakes, new words	So talks feel personal and help you learn. You can see and delete each item
Study: texts read, listening minutes, words practised	To show your progress and goals
Usage: dates and length of calls, their cost to us	Monthly limits, keeping costs under control (our legitimate interest)
Devices: signed-in devices (browser type, approximate city), passkeys (only the public part), notification settings	Security and notifications
Telegram (only if you link it): your chat with the bot	Call links and messages there
"Write to us" messages, with your first name	To answer you

Legal bases: running the service you asked for (LGPD art. 7 V; GDPR art. 6(1)(b)); our legitimate interest for cost limits and security; and your consent, given at sign-up, for sending data to the companies below in other countries (LGPD art. 33 VIII).

We don't sell your data, we show no ads, and we don't use your data to train AI models. Camille is told not to remember sensitive things (health, religion, politics, sex life…) unless you ask her to. Please avoid sharing them; if you do, you can delete them from Camille's memory in Settings, and ask us (Write to us) to delete chat messages.

3. Who helps us (and where)

To work, Coucou uses these companies. They only use your data to provide their service to us.

Company	What for	Where
Cloudflare	Hosting: the app and everything it stores	Worldwide, incl. USA
ElevenLabs	Voice: live calls, turning speech into text, Camille's voice	USA / EU
Anthropic	Claude, the AI that writes Camille's replies and the memory	USA
Telegram	The chat with the bot (if you link it), and delivering "Write to us" messages to Eduardo	Worldwide
Apple, Google, Microsoft, Mozilla	Delivering notifications (encrypted: they can't read them)	USA
Google Fonts	The app's font (your browser downloads it, so Google sees your IP address)	USA

So your data goes to other countries, mainly the USA. These companies commit by contract to protect it (their data processing terms, which include the EU standard contractual clauses). Anthropic doesn't use this data to train its models; at ElevenLabs, calls aren't recorded and transcripts are deleted after 30 days.

4. How long we keep it

Memory	Until you delete it or your account
Chat messages	1 year
Voice notes in the app chat	90 days
Call audio	Not recorded
Call transcripts at ElevenLabs	30 days
Call transcripts at Coucou	Only until the memory is updated after the call (minutes), then deleted
Call list (date, minutes, cost)	While your account exists
Study log	About 13 months
Signed-in devices	6 months, or until you sign them out
"Write to us" messages	In Eduardo's Telegram until the request is done, then deleted

When you delete your account, it's deleted from Coucou at once. Copies in our providers' backups and logs disappear on their own schedules (usually within 30 days). Your Telegram chat stays in Telegram: delete it there.

5. Your rights

• See what Camille remembers and your signed-in devices: Settings.
• Correct your level and settings: Settings; your name: Write to us.
• Download everything: Settings → Account & privacy → Download my data.
• Delete single memories, or your whole account: Settings.
• Withdraw your consent at any time by deleting your account.
• Ask us anything, or object to a use of your data: Settings → Write to us.
• Complain to the authority: in Brazil the ANPD (gov.br/anpd); in the EU, your country's data protection authority.

6. Cookies and your device

One cookie, only to keep you signed in. The app also saves a few things on your device (your language, your sign-in). No tracking, no advertising cookies, so no cookie banner.

7. Security

Secret keys stay on our server; sign-in links expire; you can sign out any device and use a passkey. No system is perfect: if a serious leak happens, we'll tell you and the authorities quickly.

8. Changes

The date at the top changes with each version. If something important changes, the app asks you again.