Loud Alarm Clock is a free Android app developed by J Labs that has over 3 million downloads. It is the loudest alarm clock on the store with volume-boosted audio files. The app offers a unique feature where it plays random sounds each morning, so you can't get used to it.

You can choose from dozens of beautiful designs or add your own background from your photos or camera. It also provides weather for your location and allows you to select from built-in beautiful backgrounds. The app has a feature where you can set a time at which you can't snooze anymore. Additionally, you can get fun voices like Stewie and Hermione that motivate you to wake up if you keep snoozing. The customizable alarm clock design is beautiful and easy to use.