Seal
Write the note in the iPhone app, choose a six-digit PIN, and select App only or App or web. Encrypt on device.
Now also on the web
cryptoscreen
Send sealed messages from iPhone. Read them in the app or, when the sender allows it, on the web. Share a link and PIN for one private read before the encrypted message is deleted.
1,377
messages shared
278
images shared
1
read per link
30
day maximum
Browser reading is here
Read a message without installing the app.
Choose App or web when creating a message on iPhone. Your recipient can open the link on iPhone, Android, or desktop and enter the six-digit PIN in a supported browser.
The browser decrypts the message locally. The server still receives no plaintext or link secret, and the same one-time read and three-attempt PIN limit apply. Choose App only to keep reading restricted to the iPhone app.
For capture redaction and screenshot-triggered destruction, read in the iPhone app. Browsers do not provide those protections.
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
Open in the app or, if the sender selected App or web, in a supported browser. Enter the PIN, decrypt locally, and read once.
Apple review links