On Android, Alarm Clock Xtreme. It makes me solve math problems. Can also do captchas. It's truly the most important app I've ever used and I'm very thankful to

On Android, Alarm Clock Xtreme. It makes me solve math problems. Can also do captchas. It's truly the most important app I've ever used and I'm very thankful to the developer. A side note: lack of sleep is terrible for your mental health and will seriously impact your work performance. Please get more sleep. And catch up on sleep as much as you can.