Qt6/QML Wayland compositor on PostmarketOS. Runs on any device with mainline Linux support or Libhybris. Core features work at 60 FPS on OnePlus 6. Performance target: fluid on decade-old chipsets, exceptional on newer hardware.
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Project Sandcastle Alternatives
Project Sandcastle is described as 'Linux with X windowing system and Android on the iPhone' and is a Mobile OS in the os & utilities category. There are more than 25 alternatives to Project Sandcastle for a variety of platforms, including Linux, Android, Linux Mobile, Android Tablet and Self-Hosted apps. The best Project Sandcastle alternative is Android, which is both free and Open Source. Other great apps like Project Sandcastle are LineageOS, /e/, Ubuntu Touch and Plasma Mobile.