Seal
Write the note in the app, choose a six-digit PIN, and encrypt on device.
One-time private reading
cryptoscreen
Sealed messages for iPhone. The sender encrypts locally, shares a link and PIN, and the recipient gets one controlled read before the row disappears.
1,260
messages shared
276
images shared
1
read per link
30
day maximum
What it does
Messages are sealed before they leave the phone.
The server stores encrypted bytes, attempt metadata, and an expiry time. It does not receive the plaintext, the link secret, contact lists, or account profiles.
A correct PIN consumes the server row. The third wrong PIN destroys it. Unused links expire after 30 days.
If iOS reports a screenshot while a note is open, cryptoscreen immediately wipes the visible reader session. Screenshot detection is best-effort and cannot protect against external cameras or compromised devices.
Share
Send the link and PIN through separate channels. The URL fragment keeps the secret out of server logs.
Read once
The reader reveals a narrow window, with capture redaction, screenshot-triggered destruction, and no selectable plaintext.
Apple review links