Download

Android & Wear OS

Google Play F-Droid repo APK

Linux

Flathub Flatpak

Arch Linux (AUR) 
yay -S keyguard-bin

macOS

DMG

Homebrew 
brew install --cask keyguard

Windows

MSI

WinGet 
winget install --id ArtemChepurnyi.Keyguard
Scoop 
scoop bucket add extras
scoop install keyguard