Math Alarm Clock - Wake up is a free iPhone application developed by Jason Tongbai. With over 1 million downloads, it is a scientifically designed alarm clock that wakes up your brain. The app's unique feature is that you have to solve a mathematical problem out loud to turn off the alarm. The alarm won't stop until you get it right.

This app has a beautiful, customizable alarm clock design. It allows you to add your own background from your photos or camera or choose from dozens of beautiful designs. The app also provides weather information for your location. Additionally, you can use voice commands like "Jarvis set alarm for 7:30 AM" to set an alarm, "Jarvis time" to hear the time, and "Jarvis light" to turn on the flashlight.

Math Alarm Clock - Wake up also has fun voices like Stewie and Hermione that motivate you to wake up if you keep snoozing. The app has received positive reviews from users who find it helpful in waking up on time.

However, it is important to note that the app does require access to your microphone to solve the math problem.

Overall, Math Alarm Clock - Wake up is a helpful and unique alarm clock app that is worth trying out.