Custom Hiit Interval Timer Pro is a free iPhone app developed by Noah Sjoberg. It falls under the category of Utilities & Tools and offers a simple and straightforward interface for users.

The main feature of this app is its ability to create custom High-Intensity Interval Training (HIIT) timers. Users can easily adjust the number of intervals and the duration of each interval according to their specific workout needs. The app ensures that the screen does not turn off while the timer is running, allowing users to stay focused on their workout without any interruptions.

Overall, Custom Hiit Interval Timer Pro provides a convenient and user-friendly solution for individuals looking to incorporate HIIT training into their fitness routines. With its customizable features and easy-to-use interface, this app is a valuable tool for anyone seeking an efficient and effective workout experience.