BrainWorkout7 is an iOS app that contains 7 brain training mini games. 1. N'Back The nback task is a method of measuring temporary memory ability (working memory ability) introduced by Kirchner in 1958. The nBack task was found to have the effect of not only measurement but also improving temporary memory ability itself, and is now being treated as one of brain training. 2. Ball In Shell The white shell swaps back and forth and left and right. This is a brain training that tracks the shell that contains the red ball. 3. Missing Number It is a brain workout that searches for missing number from consecutive numbers. 4. Display Order In this brain workout, spheres that appear in order are deleted in that order. 5. Camera Position You will be presented with a view from the ceiling and a photo taken. Think about which camera position the photo was taken from. 6. Hopping Hop on the sinking floating grass and cross to the opposite shore. 7. Calculation This is a calculation problem that answers which four arithmetic operators (+,-, ×, ÷) match the “?”.