Here's changelog for latest dev-builds, last one released Jun 24, 2021:

+ Fetch ARM Qt5 from new location;
+ Code style fix.;
+ Reorganize iOS storyboard to allow leaving the settings screen;
+ Fix audio toggle on iOS;
+ Update on screen widget status;
+ Allow opening preferences while game is running on iOS;
+ setupWindow when Activity is created;
+ VirtualPad should not be focusable;
+ Make the alert controller a bit nicer on iPads;
+ Update system UI visibility when getting window focus;
+ Call super class function;
+ Update GS handler preferences in-game;
+ Allow opening preferences while game is running on Android;

https://purei.org/downloads.php