I know what you are looking for. You want something that will charge your cell phone while listening to an external USB DAC. The bad news: your phone won't charge while you're listening. The good news is that when your phone is charged, you can listen without draining your phone. Music is streamed via Tidal via USB Audio Player PRO. While you still can't transfer MQA files through the phone app, the HiRes version comes through (I can see the dragonfly turning blue). When not using other apps on my phone, I can sit and listen to Tidal for hours on very little power. The device provides power to the DAC, so the DAC does not drain the phone. I've made great strides in the past few days, sitting in cafes and libraries, grading midterm exams for hours on a single charge, and leaving with a fairly fully charged phone.
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