When I try to open files directly in non-native apps from the BoxCryptor Classic app (version 1.5) on iOS 8.4, nothing happens, e.g. an .xls file in the Excel app.
Specifically, using the "Open In..." dialog:
long-press on file-->Open In...-->select app
However, if I first open the file in the built-in iOS file handler, I can use the handler's "Open In..." dialog to open the file. Is this secure?
I've noticed this problem as far back as iOS 8.1.2, so it could be an iOS 8.1.x incompatibility.