CIAPP

A shared calendar, notes, to-dos and an encrypted chat for family and friends.

Get ciapp

Windows

For Windows 10 and 11 (64-bit).

Version 1.0.0 · 2026-10-08 · 115 MB

SHA-256 checksum 62b20f27c4a303a3af4539c21110fd9d8eb4f66c4d843450354fdf9c6f7b55e7

The installer is not code-signed yet, so Windows SmartScreen can show a warning. Check the publisher and the checksum, then select More info and Run anyway.

Download for Windows

AndroidIn testing

For phones and tablets with Android 7.0 or later.

I am testing the app with a small group now. You can install the test version from this page. After the tests, it comes to Google Play.

Version 1.0.0 · 2026-10-10 · 6 MB

SHA-256 checksum 45f28e5ba5147622d958191c8c49261512172d5cb69054ff150c66b148dfdb48

Android asks you to allow installs from your browser first. When ciapp comes to Google Play, uninstall this test version before you install it from Google Play.

Download the APK

What it does

Calendar

Calendar and timetable

Add one-time and repeating events and get a reminder 15 minutes before. Each child gets their own school timetable. Bring events in from your phone's calendar or an .ics file, and export them to Google Calendar, Outlook or Apple Calendar.

Notes

Notes and to-dos

Link notes to events and share them with the people you choose. Your to-dos are for you only.

People

Friends, groups and chat

Add friends by username. You don't need a phone number. A group for your family, class or team shares events, notes and its own chat.

Privacy

Private until you share

Everything you add is private until you share it. The chat is end-to-end encrypted: only the people in the conversation can read it.

Why I made it

I wanted one place for my family's plans, school timetables and messages. I also wanted it without ads and without tracking.

So I built ciapp. It is free, and I run it myself as a private person.

Your data in short

  • No ads, no analytics and no tracking.
  • Notifications show who wrote to you, never what they wrote.
  • Your account and content are stored in Google Cloud in Warsaw, Poland.
  • You can download a copy of your data and delete your account at any time.

Release notes

v1.0.0 Latest
  • First public version.

Help

Do you have a question or a problem? Write to me at radoslawgajewskii@gmail.com. I answer in Polish or English.

To delete your account, go to Delete account.