The Apple Watch is gaining not just one Runtastic app but three of the company's apps, which will be available at the Apple Watch's launch. You'll be getting access to the flagship Runtastic app, Runtastic Six Pack app, and Runtastic Butt Trainer. The added features for the Apple Watch include a Glances feature, which shows you the avatar on your wrist so it'll be easier to follow each exercise demonstration. You'll also be able to track your training plan progress (including level, training day, and next training day/time). You'll also get actionable notifications. One is it allows you to start a set during a workout. And another is the "Recover Now" notification that provides you with a countdown to the next set and shows you an avatar that demonstrates the next exercise. 

With the flagship Runtastic app, you'll also be able to monitor your statistics right from your wrist. And you can even review your weekly Runtastic app activities. 

Source: Runtastic