When you enter an iCalendar URL and optionally user name and password in ICSdroid, the user name and password will be sent to the specified server and nowhere else.
User name and password for the calendars are stored in the calendar meta-data. Any app with calendar access might be able to read them. Don't allow calendar access to untrusted apps!
Event data are stored by the Android Calendar Provider and not by ICSdroid itself. ICSdroid won't send event data to anywhere.
ICSdroid doesn't collect, process or transmit any statistical data like app or server usage. There are no ads and there's no tracking.
This Web site (ICSdroid Web site) doesn't collect or process personal data.
Visits are logged by the Web server. These logs are only used for maintenance purposes and to generate anonymous access statistics.