Interval Timer: HIIT Workout is a handy iPhone app designed to help users keep track of their work and rest periods during HIIT (High-Intensity Interval Training) workouts. With a simple and intuitive interface, this app allows users to easily enter their desired work, rest, sets, and rounds, and start their workout with just a few taps.

One of the standout features of Interval Timer: HIIT Workout is its ability to run in the background, allowing users to listen to their favorite music or use other apps while still keeping track of their intervals. This makes it incredibly convenient for users who want to customize their workout experience.

Additionally, Interval Timer: HIIT Workout offers an Apple Watch app that provides even more functionality. Users can sync their workout data with their iPhone using iCloud, ensuring that their progress is always up to date. The app also integrates with the Health app, allowing users to track their heart rate during workouts and monitor their overall fitness.

Whether you're a beginner or an experienced athlete, Interval Timer: HIIT Workout is a valuable tool for anyone looking to optimize their HIIT training sessions. Its user-friendly interface, background capabilities, and Apple Watch integration make it a must-have for those seeking an effective and convenient interval timer.