Communicate without compromise
CalixOne is a privacy-first app for secure voice calls, video calls, encrypted chat, and a post-quantum vault — all peer-to-peer, no middlemen.
Everything you need, nothing you don't
P2P Voice & Video
Crystal-clear calls over WebRTC — direct peer-to-peer, no server recording your conversations. Works seamlessly in the background via CallKit.
Encrypted Chat
Every message encrypted with ChaCha20-Poly1305 and X25519 key exchange before leaving your device. Only you and your contact can read them.
Post-Quantum Vault
Protect your most sensitive notes with CRYSTALS-Kyber-768 (NIST FIPS 203) — secure against both classical and future quantum computers.
Encrypted File Storage
Store documents and images in an on-device vault. All files encrypted with ChaCha20-Poly1305. Nothing leaves your device without your control.
Cryptographic Identity
No phone number, no email required. Your identity is generated from a cryptographic keypair stored in the iOS Keychain — only on your device.
12-Word Backup
Your identity is backed up as a BIP39 12-word mnemonic. Lose your phone, restore everything on a new device with your backup phrase.