Experience with iFi Hip Dac and Apple Products

I occasionally use my Apple devices as Roon endpoints when my significant other wants some peace and quiet. These work, but I would like to improve sound quality somewhat. Devices are an older iPhone (6 or 6s), new iPad Air and older iPad mini. I am considering purchasing an iFi Hip Dac and would be interested experience of others. In particular, does this work well with Roon? Do you get lossless sq of hi res files?

Thanks in advance.

I have an Ifi Nano but no experience of this one. The Nano works fine but like this is not Roon tested. Can’t see why it would not work.