HD Encrypted Voice Calls
Opus 48kHz fullband audio with WebRTC DTLS-SRTP peer-to-peer encryption. Protect your phone conversations against ISP wiretapping or carrier surveillance.
Bob Smith
Opus 48kHz HD Audio • 16kbps
Voice Architecture & Engineering
Merging military-grade encryption with crystal-clear acoustics.
Opus 48kHz Codec
Utilizes Opus fullband audio for ultra-low latency. Dynamically scales bitrate based on current network throughput.
DTLS-SRTP Stream Security
WebRTC DTLS-SRTP encrypts audio streams peer-to-peer between mobile handsets. No third party or relay server can listen to calls.
Adaptive Low-Bandwidth Mode
Optimized for weak cellular networks (3G/4G or congested public Wi-Fi) with forward error correction (FEC).
Noise Suppression & Echo Cancellation
Smart acoustic filtering isolates human voice frequencies while muting background traffic, wind, or room echoes.
Explore Other Core Features
Discover CALL's end-to-end encrypted capabilities.
Encrypted Chat
1-on-1 E2EE messaging with Double Ratchet security.
Group Chats
Multi-recipient Sender Keys encrypted group conversations.
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 Private Voice Communications
Available on iOS and Android. Free HD calls with zero subscription fees.