Sello

A journal only your phone can open.

Write privately, publish when you’re ready. Sello seals every private page on your phone. Your face or fingerprint opens it, there or on the web. No passwords to leak.

One email when Sello is in the stores, nothing else. Then we delete your address. Privacy

Open in Google Play Open in App Store Sign in on the web

Coming soon to Google Play and the App Store, in the next few weeks after testing.
Android 11+ · iOS 17+ · Free

How signing in works

  1. 1

    Set up the app

    Pick a name, confirm with your face or fingerprint, and save your recovery key somewhere safe.

  2. 2

    Open the web

    Scan the code with the app, or tap Open in Sello on your phone. Your browser makes a one-time key just for this visit.

  3. 3

    Approve with a touch

    The phone signs you in and hands the browser your journal key, end-to-end encrypted.

Lost your phone? Your recovery key moves the journal to a new one and signs the old phone out everywhere.

One home, many voices

Every writer gets their own address and a style to match.