Because the actual game is arcade-exclusive, players use simulators to practice charts on their own devices.
Common sources include the Maimai Simfiles Discord or specialized fan sites. You then move these folders into the levels or songs directory of the app. Download Maimai
Purchase an Aime or Banapassport card at the arcade. This allows you to "download" and save your personal play data, scores, and unlocks to the cloud. Because the actual game is arcade-exclusive, players use
If you want to play the "real" game, you don't download it—you find a cabinet. Because the actual game is arcade-exclusive
The simulators come "empty." You must download song packs (called charts or simfiles) separately.