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But all the reputable ones are really good as far as technical specifications are concerned. The Apple DAC supports 16/24 bit audio, at either 44.1/48kHz. The google DAC does 16 bits at 44.1kHz, and 24 bits at 44.1/48/96kHz. They actually sound better than the headphone jacks integrated into most phones or laptops.
The audio jack adaptor that google sold with the google pixels also had an internal DAC
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But all the reputable ones are really good as far as technical specifications are concerned. The Apple DAC supports 16/24 bit audio, at either 44.1/48kHz. The google DAC does 16 bits at 44.1kHz, and 24 bits at 44.1/48/96kHz. They actually sound better than the headphone jacks integrated into most phones or laptops.
Still wish phones kept the headphone jack though