Shift Calendar is an Android app developed by Сергей Попов.

Shift Calendar first became available on 21 Jan 2012. It is estimated that Shift Calendar has been downloaded between 100000 and 500000 times from the Play Store.

Shift Calendar 1.42 requires the following permissions:

Allows an application to receive the ACTION_BOOT_COMPLETED that is broadcast after the system finishes booting. If you don't request this permission, you will not receive the broadcast at that time. Though holding this permission does not have any security implications, it can have a negative impact on the user experience by increasing the amount of time it takes the system to start and allowing applications to have themselves running without the user being aware of them. As such, you must explicitly declare your use of this facility to make that visible to the user.

Allows an application to broadcast an Intent to set an alarm for the user.

Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.