Phoenix OS is based on Android Lollipop 5.1.1 and Linux kernel 4.0.9 with support for OpenGL ES 3.0. It runs Android packages (APK) and it has a few of them pre-installed, like Stardust Browser based on Chromium 45 and WPS Office. The rest you can download from Google Play Store, F-Droid, Mobogenie or Aptoide.
Here are some screenshots from Phoenix OS 1.0 Beta:
|Stardust Browser scores 495 points in HTML5 Test|
|Stardust Browser scores 18035 points in Octane Benchmark|
Download Phoenix OS 1.0 beta from EU server