Five steps. Nothing to install for the person receiving it.
A note, an audio, a photo, a video, a PDF. The type is recognised on its own.
Encryption happens in your browser, before sending. The password never leaves.
By WhatsApp, by email, wherever you like. The link alone opens nothing: the password goes separately.
No account, nothing to install. Your recipient types the password. Eight tries, no more.
Once it's read, the file leaves the server. Never opened? Erased when the time runs out.
You can cancel. You get your send back.
So is the message. Even we can't do anything.
It uses nothing up. Only the right password opens the message.
You get an email when it's opened, or if nobody opened it in time.
Create a new one. The old one stops working.
They can, once, without an account. If you allowed it.