Kairo - Postcard Journal
One Prompt. Three Postcards.
Only for iPhone
Free
iPhone
Every Thursday, everyone gets the same prompt. Take up to 3 postcards, then it all reveals together, friends only. Turn public to be eligible for staff picks.
Kairo is a weekly journal you keep only with your close friends.
Every week, Kairo gives you one small prompt. Talk to a stranger. Get lost on purpose. Take the long way. Start before sunrise. Each one asks for a little courage: go somewhere you wouldn't have gone, say yes when you'd usually pass. You answer it in postcards, a photo from your real week with a few words on the back.
Then nothing happens. Nothing your friends make is visible until Thursday, when everyone's week is revealed at once. One quiet moment where you see how the same prompt lived differently for each of you.
By default there is no audience. Your Kairos go to the handful of people who already matter to you and nobody else. If you ever want more than that, you can turn on World and see how strangers answered the same prompt. It stays off unless you choose it.
Kairo is small on purpose:
• One prompt a week, written by hand. Never AI, never generic.
• Up to three postcards a week. A finite, deliberate set, not an endless stream.
• Camera-only capture. The moments you actually lived, not your camera roll.
• A Thursday reveal that turns an ordinary week into something you kept.
Make the day count.
• Save a postcard to your photos — printed like a real card, with the place and date in the margin.
• Kairo answers your touch now: the shutter, the Thursday reveal, a week you liked.
• Long-press the app icon to go straight to the camera.
• Invite links open Kairo directly, and you can copy one to paste anywhere.
Make the day count.
The developer, Minjoon Eom, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Minjoon Eom
- Size
- 37.6 MB
- Category
- Social Networking
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Contains
User-Generated Content
Social Media
- Copyright
- © 2026 Joon Eom