Version 0.9.8 is a significant historical build. It was one of the last versions before the major UI overhaul and the Vulkan backend were introduced.

Before installing, check:

Assuming you have downloaded the APK and installed it on an older device:

Pro tip for 0.9.8: Disable "Atrac3+ audio decoding" unless you need perfect music in Final Fantasy Type-0. This saves 10-15% CPU.