A private app for two. Encrypted on the phone, not on the server.
Checking the version…
Android 8.0 and newer. This is not from Google Play — after the download your phone will ask for permission to install from this app. Later versions the app offers you by itself.
English, German, Spanish and French. The app asks on its very first screen and you can change it later in Settings — it applies to the app only, not to the whole phone.
You have an invitation. Install the app above first, then tap the button — the server address and the setup code fill themselves in, so there is nothing to type or copy.
Open in the appNothing happened? Then the app is not installed yet — download it above, finish the install, come back to this page and tap again.
The code is short-lived and works once. When it expires, create a new one on the first phone.
None of the content. Tasks, notes, the calendar and polls are encrypted on the phone with a key the server never receives. What sits on the server is an encrypted blob and two technical values the access rules need.
In practice: if someone got to the server, there would be nothing to read. It also means a lost key cannot be recovered — so write down the recovery key the app shows you at first start.
Uploading your own photos is switched off on this server. The stickers bundled with the app work as usual — they are never uploaded anywhere.