Ziba has Ayumu (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE for a limited time.

Named after the chimpanzee Ayumu , who is currently living at the Primate Research Institute of Kyoto University and whose photographic memory is better than trained university students, this game not only challenges your memory skills but also your motor skills.

The player is presented with a set of numbers arranged in random positions for a limited period of time after which the numbers are hidden and the player must uncover the hidden numbers by tapping them in the right order.