“a collection of free screen savers for X11, macOS, iOS and Android.  by Jamie Zawinski and many others. XScreenSaver for Android is… a set of screen savers and live wallpapers. That’s it. It draws pretty pictures on your screen. And it’s free. That’s the whole deal. But in their wisdom, Google — the most rapacious privacy violator on the planet — have decreed that XScreenSaver cannot be made available on their “Play” [sic] store until I publish a “Privacy Policy”. For a screen saver. A privacy policy. For a screen saver. This pantomime where Google pretends to care about your welfare would be hilarious if it wasn’t so sad, but here we are anyway. Ok, strap in!”