Lumosity
Free in the iOS Store and Android Play Store, Lumosity offers an ever-expanding set of cognitive and scientific games designed to improve your working memory and stimulate your brain on a daily basis. Part of what these games are designed to do is strengthen your ability to pay attention to the right things — that is, the things that help you solve the task at hand — while learning to ignore things that don’t help. Lumosity is one of the most popular brain-training games out there, used by more than 60 million people worldwide.