All links on site www.wireguard.com/install
Most popular clients:
Windows: https://download.wireguard.com/windows-client/wireguard-installer.exe
MacOS: https://itunes.apple.com/us/app/wireguard/id1451685025?ls=1&mt=12
Android: https://play.google.com/store/apps/details?id=com.wireguard.android
Android APK: https://download.wireguard.com/android-client/com.wireguard.android-1.0.20250531.apk
IOS: https://itunes.apple.com/us/app/wireguard/id1441195209?ls=1&mt=8
