端到端加密的聊天，专为移动而生。 End-to-end encrypted chat, built for mobile.
消息只在你与对方设备间解密。End-to-end encrypted by default.
同一账号仅限一台设备在线，杜绝盗用。One device per account, no concurrent sessions.
冷启动毫秒级，占用更小。Fast cold start, light footprint.