Make sure to take a look at the new version of hyperion, hyperion.ng. https://github.com/hyperion-project/hyperion.ng
There are many nice things in the json rpc you can use and they are getting more "every day"
Looking forward to your app. I can test several things and help with some obj-c questions if needed
Thank you for the info!
I would love to help making an iOS app, but please don't expect to much of me. I'm a beginner regarding swift and objective-c and like most of us I work 40 hours a week. Nevertheless I'm going to do my best!