Honestly, I was a bit shocked to find out that this app is entirely free. Since every other interval app requires payment, this one truly is a hidden gem. This is app is entirely customizable from the amount of workouts you can create and save, to being able to skip an exercise during a workout, to custom exercise names and times. It even allows you to choose what sound you want to play when you’re switching an exercise or finishing a workout. Overall, I highly enjoy this app and will continue to use it in my daily life!