Memory diversions

iPhone / Apple

 * Paid Version: http://itunes.apple.com/nz/app/brain-exercise-dr.-kawashima/id318200302?mt=8
 * Free version: http://itunes.apple.com/us/app/brain-exercise-lite-dr-kawashima/id327245547?mt=8
 * Full version: http://itunes.apple.com/us/app/train-your-brain-dr.-kawashima/id416798601?mt=12

Android / Google Play

 * Paid Version: https://play.google.com/store/apps/details?id=com.namcowireless.mbe&feature=search_result
 * Free Version: https://play.google.com/store/apps/details?id=com.namcowireless.mbedemo&feature=search

(Thanks Damian- 2012)