NN Clock, also known as the No Nonsense Alarm Clock, is a simple yet powerful alarm clock app designed specifically for iPhone users. With its minimalistic analog clock interface and reliable alarm features, it has quickly become a favorite among users.

The app allows you to set an alarm by simply moving the alarm hand, making it quick and easy to schedule your wake-up time. You can choose from three different alarm options and easily turn off the alarm by swiping the alarm window. Additionally, the app offers a timer/countdown feature that can be started by turning the ring.

One of the standout features of NN Clock is the ability to change the background images, allowing you to customize the app to your liking. The app also integrates with HealthKit, allowing you to register your sleep patterns.

When the alarm goes off, you don't have to make a decision between multiple buttons - there is only one: Snooze. The alarm sound can be chosen from a selection of eight built-in alarms, all of which continue to work even when the app is in the background or the device is suspended. If you prefer, you can also select a song from your Music library to gradually fade in as the alarm sound when the app is in the foreground.

Overall, NN Clock is a simple, elegant, and highly functional alarm clock app for iPhone. It offers a user-friendly interface, reliable alarm features, and the ability to customize the app to your preferences. Whether you're looking for a basic alarm clock or a more advanced sleep tracking tool, NN Clock has you covered.