Workout & Interval Timer -HIIT is a free iPhone app developed by Masafumi Negishi. It falls under the Lifestyle category and specifically targets Health & Fitness. This app is designed to assist users in their fitness and workout routines, making it particularly suitable for Tabata Training. With an easy and simple interface, users can quickly get started.

The main feature of Workout Interval Timer -HIIT is its timer function. Users can set the duration for workouts or intervals, ranging from 5 seconds to 59 minutes and 55 seconds. Additionally, the app allows users to set the number of sets, ranging from 1 to 99. This flexibility allows for customization based on individual fitness goals and training preferences.

Another useful feature of this app is the menu function. Users can easily register timers that they frequently use, making it convenient to access them with just a few taps. The app allows for the registration of up to 100 lists, providing ample space for various workout routines.

Workout Interval Timer -HIIT also offers sound and vibration settings. Users can choose to enable or disable these features separately. However, it is worth noting that in silent mode, sounds are not available.

For those who prefer audio cues during their workouts, the app provides a read-aloud feature. When enabled, the app will audibly announce the workout time and break time that the user has set. However, in silent mode, there will be no sound.

Overall, Workout Interval Timer -HIIT is a simple and user-friendly app that can be used for basic training or fitness purposes. Whether you're engaging in Tabata Training or other workout routines, this app provides the necessary tools to keep track of your intervals and sets effectively.