dnSpy turns compiled code back into readable C#.

If you see a site offering a "dnSpy APK," it is likely a fake or a malicious file. Instead, users typically use dnSpy on a PC to modify Android games that use the . Why dnSpy is Used for Android Apps

If you need to perform reverse engineering directly on your Android device without a PC, these apps are the closest functional equivalents: Releases · dnSpy/dnSpy - GitHub