Use a secondary device, download only from a trusted APK archive, and don’t expect it to work smoothly on any modern flagship.
: For a similar aesthetic on newer phones, many users now use highly customizable launchers like Nova Launcher or Microsoft Launcher combined with third-party icon packs and gesture apps to mimic the Sailfish feel.
If you are looking for a radical change from the norm and appreciate minimalist design, the Jolla Sailfish Launcher is worth a try. It is a piece of mobile history, bringing the spirit of Nokia’s MeeGo innovation to modern Android screens.