2015-04-28 00:00:00 This app is a workaround for a bug introduced by Google at Android 4.1 (Codename: JellyBean). This bug will only affect you if you install my app from the Google Play Store and if you want to use CalendarSync to create custom calendars. Please also install it when you are using Android 4.4 or later, else Android, so also this is an bug in Android, will delete your Calendars when you update the app. Please note that this issue also affects you if you are using a SAMSUNG device even if you have installed a more recent Android version then 4.1. So far SAMSUNG is the only known vendor which did not integrate Googles patches for this issue so that also all up to date SAMSUNG original roms are affected by this. So please install this workaround app also on current SAMSUNG devices.