官方下载Official Download
所有平台（Android、iOS、Windows、macOS、Linux）统一入口：Single entry for all platforms (Android, iOS, Windows, macOS, Linux):
https://signal.org/download/
Windows
macOS
Linux
Android
iOS
安装提示Install Tips
- 先安装手机版 Signal 并完成注册。
- 再下载电脑版，打开后用手机扫码关联。
- 电脑版系统要求：Windows 10/11、macOS 13+、Linux amd64。
- Install Signal on your phone and register first.
- Then install the desktop app and link by scanning the QR code.
- Desktop requirements: Windows 10/11, macOS 13+, Linux amd64.