Performance · Worldwide
Downloads & Revenue estimates
Monthly, by storefront, with daily history
Rating · WW
3.9★
11 ratings
Chart position
Apple's Top Grossing chart — all apps ranked by revenue (purchases + subscriptions).
Ratings count — US
Listing
The Concentration Grid app is based on the mental focus grid exercise. Mental focus grids have long been used as a tool by coaches and sports performance/psychology professionals to assess and improve performance of their athletes. The objective of the grid exercise is to select in sequence each of the numbers (randomly arranged and presented) in the grid. Performance is timed. The challenge is to complete the grid as quickly as possible. The exercise calls for focus and concentration. Th
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