CalendarSync is an Android app which allows it to synchronize your appointments/calendar using CalDAV, FTP, HTTP, WebDAV, or plain ics files (stored on your device or e.g. mail attachments). There are also a lot of additional features available. All this can also be done !independent! from the Google services like the Google calendar. It also provides a lot of additional features. If you want to get information about how to test the app please scroll down.You also can buy the app directly from me and not on the Play Store. Then it will be much more cost effective. For more information take a look on my website.Features: