OnceChat
Kosei Takanashi
No ratings yetSocial NetworkingAges 4+
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About this app
OnceChat is a quiet messaging app built around a simple idea: just one message a day. Away from endless notifications, constant replies, and the pressure of read receipts — you choose one message each day, carefully, and send it. That's OnceChat. ■ One message a day Just one message per day, taking turns. So every single letter matters. ■ Quietly gone in 24 hours Your words fade after 24 hours. Because nothing is kept, some things become easier to say. ■ No notifications No push notifications, ever. Open the app when you want to, at your own pace. A quiet place that never rushes you. ■ Today's letter Share one short public letter a day with all your friends. Send yours, and you can read theirs too — a new, reciprocal way to stay connected. ■ Thoughtfully secure No passwords — sign in with a passkey (biometrics). Messages are encrypted. No ads, and no third-party tracking. A calm space, like the quiet before dawn. Send your one letter today, with OnceChat.
What's new
Version 1.2.0 · Aug 2, 2026
Introducing Circles. - Exchange "today's letter" within a small named group — a seminar, a circle of friends. - Separate from your letter to all friends: one letter a day for each circle. - Everything still fades quietly after 24 hours. New users now see a screen for inviting friends. Plus other small improvements and bug fixes.