mono
the app to have that conversation - private & encrypted chat
mono launched on June 30, 2026 with 3 votes, #6,658 of 22,647 launches that month and more than 50% of that year's launches.
What it does
mono is an ephemeral messaging app built on radical privacy. One conversation at a time. No sign-up, no identity, no history. End-to-end encrypted messages that self-destruct. Available on iOS and macOS.
mono is a radically private messaging app built on the principle of Digital Monogamy — one conversation at a time. No sign-up required. No name, email, phone number, or personal data. No profile picture, no history, no trace. Share your unique rotating key or enter someone else's to start a conversation. Each key is 18 characters, rotates every 3 minutes, and connects exactly 2 people. Once connected, you enter an exclusive 1-on-1 encrypted chat. Every message is end-to-end encrypted using Curve25519 ECDH + AES-GCM. Not even mono's servers can read your messages. Only the last 15 messages are visible — older messages are permanently deleted. If there's no activity for 36 hours, the entire…from monochat.app
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