Runervals is described as 'Running Intervals are a great way to train and improve your conditioning, speed and technique' and is an app in the Sport & Health category. There are more than 50 alternatives to Runervals for a variety of platforms, including Android, iPhone, Online / Web-based, Android Tablet and iPad. The best alternative is Strava, which is free. Other great apps like Runervals are Google Fit (Free), RunKeeper (Freemium), GPXSee (Free, Open Source) and Adidas Running by Runtastic (Freemium).
Shift is a fitness app that plays both podcasts and music while you train. It’s controlled by a timer, so it plays podcasts during the relaxing part and music when it’s rough, and so it shifts back and fourth.