This Android alarm clock has dramatically increased my speed and ability to do simple arithmetic: <a href="https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=com.alarmclock.xtreme.free" rel="nofollow">https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=com.alarmclock...</a><p>It allows the user to set an alarm that can only be turned off by solving math problems. You can imagine how quickly one&#x27;s brain improves at this task when the reward is a snooze or a removal of a blaring alarm at 5 in the morning.