I realise there is an iOS app but it looks like it hasn't been updated since 2013 and so I'm wondering if it's still supported. I'm nervous about investing time in a system that is being phased out.
We are working on an update of the iOS app, mainly to make sure it works using iOS 11, but there will also be some design updates. This update won't however have any new features.
But yes, it is will supported.