I used to use Dirac on my iPhone, it astounds me how Apple could not use something like this to make their stock earbuds sound so much better (but then they did buy Beats…)
After that I found Accudio which still runs on iOS 11 (although you can no longer get it on the app store and it appears that the servers that I used to be able to load custom profiles from is no longer up). This had profiles for a bunch of different headphones - e.g. sound tailored specifically to my Sony MDR-V6s, and the had tons of other models too.
Now that Dirac is dead and Accudio only sort of works I was wondering if anybody has found a better player or utility for iPhone? There is an Equalizer app I’m going to take for a test spin.