Pattrn is an Android app developed by Lucas Rocha.

Pattrn first became available on 13 May 2012. It is estimated that Pattrn has been downloaded between 1000000 and 5000000 times from the Play Store.

Pattrn Beta 13 requires the following permissions:

Allows applications to open network sockets.

Allows applications to perform I/O operations over NFC.

Allows an application to read from external storage.

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 applications to set the wallpaper.

Allows an application to write to external storage.