1-on-1 End-to-End Encrypted Chat
Engineered for ultimate conversational confidentiality. Every text message is encrypted right on your physical device before transmission. No server holds plaintext logs or decryption keys.
Technical Architecture & Specifications
State-of-the-art cryptographic engineering behind CALL chat.
Double Ratchet Key Management
Generates a fresh ephemeral key for every single message. Even if a future key were ever compromised, past conversation logs remain completely secure.
SQLCipher On-Device Database
Local databases stored on physical devices are encrypted via 256-bit AES SQLCipher using keys isolated inside native Keychain/Keystore environments.
Disappearing Messages
Set self-destruct timers for messages. Payloads are erased cleanly from both sender and recipient devices upon expiration.
Zero AI Analytics or Profiling
No message mining, keyword scanning, or advertising profiling. Your private messages belong exclusively to you and your recipient.
Explore Other Core Features
Discover CALL's end-to-end encrypted capabilities.
Group Chats
Multi-recipient Sender Keys encrypted group conversations.
HD Voice Calls
Crystal-clear 48kHz Opus audio over DTLS-SRTP WebRTC.
HD Video Calls
1080p 60FPS encrypted video stream with zero facial mining.
File & Media Sharing
AES-256 chunked streaming for photos, videos, and documents.
High Performance
Microsecond DB queries, 0.08s warm launch, zero battery drain.
Experience Truly Private Messaging
Available on iPhone and Android. Start communicating with zero subscriptions or tracking.