Relax and tap from 1 to the end of 30 or ...100 and reversely. Start Tap 1-30 or Tap 30-1 first because it is the easiest and fastest to finish. Try to memory where are the numbers following the next tapping number while looking for the next number to tap.
Repeat playing will find the next number easier and faster. This will help the sensation and memory with number.
The elapsed time start counting after 1 is tapped, pause while it is behind (receiving call, go to home screen ...) and continue while it is back on screen, stop when the last number is tapped.
The statistic keeps up to 30 of the most recent records. With these 30 records, it shows the range and average. The smaller range tells more stable. If the elapsed time is smaller than the average, it tells improving.
The number box colour can be changed before the time start elapse.