I'm not sure what's the situation with kivy nowdays, but when I tested it last time for mobile (few years ago) I was taken away with the initial loading time...

I'm not sure what's the situation with kivy nowdays, but when I tested it last time for mobile (few years ago) I was taken away with the initial loading time... When you run a kivy app you see a loader with kivy logo and it lasts too long to consider your app snappy enough. Once the app actually starts, it runs OK. Desktop performance was better, including loading times, due to direct utilization of OpenGL.