A web or PC / Windows version for aCalendar is not planned.
As we don't have our own cloud service, it makes little sense to offer a web interface, please use the web interface of your cloud service.
Given the complexity of a PC calendar app and already existing options (MS Outlook, Mozilla Lightning) it also makes no sense for us to develop one more calendar application.
We rather spend the energy on Android, which is difficult enough with yearly OS releases, strong modifications from HW manufacturers and many different cloud adapters that bend the calendar standards to their liking.