!!! THIS IS NOT MODDED ARCAEA !!!
!!! NO DEVICE MODIFICATIONS/JAILBREAKING WERE DONE !!!
This is actually called ArcCreate, a completely fanmade chart player. You can get it from https://github.com/0thElement/ArcCreate
I was able to get this on my iPad from the *OFFICIAL* application on the App Store called TestFlight. You can get the invitation code from the github.