Are there any Android calendar apps that do not use the stock Android Calendar Storage?
Even for typical offline calendars, Android stores the data in its own Calendar Storage.
I'm looking for solutions that do not use Android's Calendar Storage at all.
I am interested both in options that are completely offline and those that sync to a server.
I am not interested in solutions that require you run your own server, unless it is a push-button server that can be set up on a gratis host in 5 minutes. In other words, I'm not interested in solutions that require running your own 24/7 server or paying for hosting just to have a working calendar.
I prefer gratis solutions, but will consider solutions that have a one-time payment. Please, nothing with monthly service fees.
I prefer something that will allow .ics imports/exports and that allows multiple calendars, but those are preferences, not requirements.
The only solution I have found thus far is Jorte, but the UI is confusing, it does not allow .ics imports/exports (only .csv), and it requires a monthly fee to have more than one calendar.