ICSdroid is a Android 4.0+ app to subscribe to remote ("Webcal") or local iCalendar files (like time tables of your school/university or event files of your sports team). It will
- download each iCalendar file regularly at a given interval and
- import it into a native read-only calendar, which then can be used with your favorite calendar app.
Tested with various services
- Subscribe to shared iCloud calendars
- Subscribe to shared Google calendars
- Subscribe to any other Webcal