Is there an alternative to google calendar?

Question

Calendar

Is there an alternative to Google Calendar?
You need a convenient calendar with Web and Android versions and the ability to synchronize with other iCalendar calendars.
Alas, Google Calendar unloads URL-loaded calendars once and does not synchronize in the future (although it seems like it should be every 12 hours, but it's still very rare for me), otherwise Google is very satisfied.