These apps create a virtual Windows environment on your phone. You install the legitimate PC version of Warband (usually from GOG.com for DRM-free files), and the emulator translates x86 PC instructions to ARM (your phone’s processor).
This review covers the full Android experience, analyzing the performance, controls, and whether the magic of rising from a peasant to a king survives the transition to mobile. mount and blade warband android full
That said, if you're asking for a set in the Mount & Blade: Warband universe that fits the feel of what a mobile player might hope for, here's a solid, original narrative: These apps create a virtual Windows environment on