The simulators come "empty." You must download song packs (called charts or simfiles) separately.
Link your card to the maimai DX NET website to track your stats and customize your profile from your phone. Important Safety Note
Be cautious of sites claiming to offer a "Maimai PC Download" or "Maimai.exe." These are often scams or contain malware. Only use trusted community simulators like AstroDX if you are looking for a home practice tool. Discover maimai: Your Next Arcade Adventure with PJSK
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)
An older, web-based or tablet-focused simulator. It is less frequently updated than AstroDX but works similarly by importing song folders.