The 7-Minute HIIT Workout app is an effective training program that will help you lose weight and build abdominal muscles in only 7 minutes. It consists of high-intensity workouts that can be done with your body weight. The exercises in the app are designed to target the abdominal muscles. Each exercise has its own timer so you can easily follow the workout and make sure you perform it exactly as instructed. The app provides a variety of different exercises that can be performed in a single session. You can also do the exercises as a longer-term program, which will help you achieve a more lasting result.