blau is an Android app developed by Telefónica Germany GmbH & Co. OHG (Georg-Brauchle-Ring 23-25 80992 München).

blau first became available on 22 Aug 2014. It is estimated that blau has been downloaded between 100000 and 500000 times from the Play Store.

blau 3.1 requires the following permissions:

Allows applications to access information about networks.

Allows applications to open network sockets.

Allows an application to read from external storage.

Allows an application to write to external storage.