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This is an unofficial iOS utility application for The Idolmaster Cinderella Girls: Starlight Stage (デレステ). It's mainly based on APIs provided by other sites. It's designed to collect, cache and rearrange the game data so that you can easily search them. It also has some advance features such as live score simulator and beatmap player.


  • Card Viewer
  • Beatmap Viewer and Player
  • Character Viewer
  • Song Viewer
  • Unit Editor
  • Live Score Simulator
  • Gacha Viewer and Simulator
  • Event Viewer
  • Colleague Finder
  • Birthday Reminder

Install via TestFlight
For some reason, the App Store version will not be updated any more.


  • iOS 10.0+
  • Xcode 10.0+
  • Swift 4.2+

How to build

  • Clone the repository
$ git clone
$ pod install
  • Open the workspace in Xcode
$ open DereGuide.xcworkspace


If you want to localize the app, please goto ./Localizations/DereGuide/ and edit the .xliff files.
If you want to add a new language please tell me.
For developers only, if you have macOS and Xcode, please read ./Localizations/ and use those scripts to export or import localization.

Contributors of other languages





Follow and contact me on Twitter. If you find an issue, just open a ticket. Pull requests are warmly welcome as well.