Smartphone app measures mood and brain power

A new smartphone app that measures mood and brain power can show if you are a lark or an owl.

Psychologists launched the moo-Q app to help people discover what time of day they are at their best.

Dr Sophie von Stumm, from Goldsmiths, University of London, who helped develop the iPhone app, said: “With moo-Q, users are able to figure out when their brain is working best and then use that information to their advantage.