SoundCheck is a free Android app developed by RadonSoft that measures your phone's audio capabilities for playback and recording. It is an essential tool for audiophiles and sound engineers who want to ensure high-quality audio output.

With SoundCheck, you can easily check if your phone supports 44.1 kHz or more, which is the standard for high-quality audio. The app provides accurate measurements of your phone's audio capabilities and displays the results in an easy-to-understand format.

Moreover, SoundCheck allows you to send your results to the developer's server. This feature helps the developer build a public database of phone and OS version capabilities. However, it is optional, and you can choose not to share your results.

Overall, SoundCheck is a great app for anyone who wants to evaluate their phone's audio capabilities accurately. It is easy to use and provides accurate results. If you're an audiophile or a sound engineer, you should definitely give SoundCheck a try.