This app is for the purpose of receiving the pre-paid at the Berlin Philharmonic concerts. It is therefore logical that they will be provided free of charge. Those interested in the subscriptions, should inquire at the BPh page about the different possibilities. In addition to the live concerts you can access the archive that you can scour for years, conductors and soloists. The Android app does not allow you to jump within a piece, which when the PC is possible. The detailed information is sparse.