I’ve never heard well, any of the Campfire Audio IEMs. Right now I’m really happy with the Audeze LCDi3. I never thought I’d find an IEM that I really liked. I use them plugged into my old iPad Air most of the time with the Cipher lightning cable. Have one of the Belkin “Lightning Audio Plus Charge Rockstar” dongles so I can charge and listen, although the battery is pretty good. I like the size of the old iPad for when I use ROON or Radio Paradise - I can read the comments.
It’s just fine with the iPhone 6+ too, but I don’t know how long it will be before I go to upgrade the old device. The 6+ can’t use the newer 1900 Mhz towers that Verizon and other carriers seem to use, so I could replace it next year.
Shame Apple doesn’t make a DAP. I don’t really think of the iPod as anything more than a crippled phone. I don’t know if I need a DAP anyway. Got those LCDi3 specifically because I have a lot of Apple stuff now. (Yes I have an Android tablet too, (two of them if you count the Motorola Xoom from pre-history, runs on Android Plain Yogurt)). Dap dap dapping on my chamber door. 'Tis Audio Nervosa, nothing more.