KeyTo start a conversation, share your key or enter someone else's. Each key is unique, rotates every 3 minutes, and only 2 people can connect with the same key.
One line in useOne conversation at a time. Just you and one other person. If you have an active conversation and want to start another, you must cut the line.
No registration, no identityYou don't need registration, name, email, phone or personal data to use mono. No profile picture, no history, no trace. There's no link to your real identity.
Radical privacyEvery message is end-to-end encrypted — only you and the other person can read it. Not mono, not any server, not anyone else has access to your conversation.
Ephemeral messagesOnly the last 15 messages are visible. The rest is deleted.
Cut the lineAnyone can cut the line and everything is permanently deleted for both, instantly.
Screenshot protectionMessages, keys, photos, videos and files remain hidden if someone tries to screenshot or record the screen.
36-hour ruleIf there's no chat activity for 36 hours, the entire conversation is permanently deleted for both.
No notificationsNo badges, no banners, no sounds.
No extrasJust text, images, videos and files. No calls, video calls or voice notes.
View onceImages, videos and files can only be viewed once for both.