I recently bought an iPhone 8 Plus and managed to re-download my Capriccio Pro music player off the App Store.
Based on the last time I used it the app is more polished and more organised. But I think it could be better.
The UI still feels a bit confusing, the various sections and sub-sections needs to be properly arranged, Wifi transfer needs to be more prominent and tips and "reminders" need to be somewhat shown or pop-out whenever you click on something just to direct you on what you are doing.
The sound enhancements and audio features are simply top-notch (despite having no equalizer or Dolby Atmos) but things needs to be a bit more "less confusing", a link to contact the developer via email, a bit more polishing or organising here and there including the music player, more support for gestures and you will see the reviews will just go up.
That's my take. Here's hoping things can get better.