How long can you hold your focus or concentration?
Use Concentration Calculator to measure your concentration time, by holding the iPhone without moving. The app will detect your movement within specified threshold and will stop as soon as you move beyond these setting.
In the next level, use your memory to remember the word displayed at top and tap it as soon as it’s displayed on the center. The word will change after few second.
Use Concentration Calculator to enhance your concentration, by increasing learning to stay focused longer every time you use the app.