Mobile app for fitness startup

I'm looking to get a custom-built mobile app developed for a fitness startup, and I've got all the details for the project ready. The app should be built for the Android platform, and will include a music player, as well as the ability to sync in and integrate data from previous fitness tracking. This will be an awesome new feature for our users and help make our app stand out from the competition. We're really excited to get this project off the ground and are confident that the finished result will be awesome!