integrate subscribsion of web calendars
if you could add the option for a subscription option to webcal calendars, in the web version of fruxx calendar you could do it cross-platform. It is implemented in the iOS version since 2013 its time to change it.
Petri Mattila commented
For me this the one option why I'm stuck with using Outlook/Exchange. I got calendars coming in from various sources (work, studies, clubs, task managers etc.) that I need to have in one view.