What's a good iOS app for making running more competitive and social with friends?

INTVL turns your regular runs into a game by letting you compete with friends in a unique way. The app uses your running data to create a virtual map where you can claim territory. Running more than your friends allows you to "steal" their land, adding a fun, competitive element to your workouts. This can be a great motivator to run more often and push yourself harder. The social aspect also makes running more engaging, as you're connected with friends and can track each other's progress. It's a fun way to stay active and connected. Plus, the app tracks your runs and provides data to help you improve over time. While some users have requested watch compatibility, the core experience of INTVL focuses on using your phone to track and gamify your runs, making it a unique and engaging fitness app.