Docking station for an iphone

Pure i20 is compatible to  iPhone 4.......

Yes but there is an adapter for the lightning connection of the later versions of the iphone. I use this and it works fine. I have my I20 running out to a Bifrost Uber extrenal DAC. Sound fantastic!

I’m using a powered usb hub with the lightning adapter with an Ipad Air 2. I use a Halide dac as well as the built in dac in my integrated amp. Works very well streaming Deezer and is dead quiet. I am considering getting an ifi usb 2.0 hub to see if further improvements can be had.

What drove my interest in this was that I have a friend who streams Pandora via his iphone. As I am now helping him set up a macbook pro as a music server I will advise him to use that instead. I remain interested in the options for iphone use however. Thanks to all for this discussion.