If you want to play the "real" game, you don't download it—you find a cabinet.
While there is no official digital version of the Sega arcade game for PC or mobile, the "complete paper" or guide for downloading a similar experience usually involves using community-made simulators like AstroDX or MaiPad DX . How to "Download" Maimai (Simulators) Download Maimai
It is typically shared via the AstroDX Discord or GitHub. You will need to download the .apk for Android or use AltStore/TestFlight for iOS. Downloading "Charts" (Songs) If you want to play the "real" game,
An older, web-based or tablet-focused simulator. It is less frequently updated than AstroDX but works similarly by importing song folders. Download Maimai