This alarm really works and this is the best. Math requires mental focus and precision. 99.99 percent of the time, it's impossible to solve a math problem when a person is half asleep. But the "Solid Alarm" sound is so loud and annoying and the only way to turn it off is by solving the math problem. After you give the right answer, your mind is so awake and you can't go back to sleep anymore.
1. Corrected english localization
2. Added japanese localization
Free and smart alarm clock app with multiple alarms for heavy or deep sleepers
LOUD alarm clock tones! loud Alarm Clock sounds and call ringtones