I suspect there are a number of brands that can do frequency compression like the Phonak, and are iPhone compatible. I may have posted this before, but this is how Signia or Rexton software would treat your hearing loss as a starting point. It can be adjusted manually as well. I would suggest for sure that you would benefit a lot from frequency compression to recover the high frequencies. The software is suggesting that all frequencies from 2 kHz to 10 kHz be compressed down into the 2 kHz to 3.25 kHz range.
My understanding is that the new Kirkland Signature 9.0 will stream direct to an iPhone or Android, and is a Phonak. It would be a potential choice.