The new #HVV Hamburg public transport app, how to make an upgrade really suck..
https://play.google.com/store/apps/details?id=de.eos.uptrade.android.fahrinfo.hamburg&feature=nav_result#details-reviews
Good I use #Öffi anyway, from its F-Droid repo https://oeffi.schildbach.de/download.html
Only quirk, because there's no free API for HVV one has to choose SH Schleswig-Holstein transport that covers HVV as well..