Phrasalstein is an Android app developed by Cambridge Learning (Cambridge University Press) (University Printing House Shaftesbury Road Cambridge United Kingdom CB2 8RU). Others apps created by Cambridge Learning (Cambridge University Press) are: E. Monstruo, Phrasal Verbs Machine, Grammar.

Phrasalstein first became available on 19 Nov 2013. It is estimated that Phrasalstein has been downloaded between 50000 and 100000 times from the Play Store.

Phrasalstein 1.2 requires the following permissions:

Allows applications to disable the keyguard if it is not secure.

Allows applications to open network sockets.

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