New iOS Drive app beta from Open-Xchange
It was announced in the German forum today that Open-Xchange is about to release a new iOS app. Now they ask Mailbox.org users for their feedback: https://userforum.mailbox.org/topic/5958-ox-drive-app-fur-ios-beta
The Drive app preview is available at https://testflight.apple.com/join/D43vo5X0 - you need Apple's Testflight app to install it. Feedback can be sent directly to the app team at Open-Xchange via email@example.com
Looks pretty promising!