Games developer Chris Mayer has updated Brain App (, the brain training software for the Mac, iPhone and iPad to version 1.5.

Brain App presents a variety of rapid-fire math problems in quick succession to exercise the brain. There are now 15 brain exercise modes in five exercise types.

Brain App 1.5 is available from the Mac App Store for US$3.99. On the Apple App Store, the iPad version is priced at $2.99, and the iPhone version is $1.99.