N-Back Challenge is described as 'The N-Back Challenge provides a special type of cognitive training, “dual n-back,” that helps you raise your IQ in just a few minutes per day. Sounds implausible? The N-Back Challenge is based on a decade’s worth of scientific studies, published in top peer-reviewed journals' and is an app in the sport & health category. There are more than 25 alternatives to N-Back Challenge for a variety of platforms, including Android, iPhone, Web-based, iPad and Android Tablet apps. The best N-Back Challenge alternative is Lumosity, which is free. Other great apps like N-Back Challenge are Cogniba, Elevate, gbrainy and Peak.