This app is a horrible attempt at a money grab, and frankly there's no reason for it. Devices should natively support streaming, not through a third party app, frankly this app won't be supported in five years and your device will be reduced in its ability to stream music. Many people are having problems maintaining a connection to their amplifiers (from different manufacturers) while using this app. Reaching out to tech support didn't yeild a response.
DTS Play-Fi™ at Google Play market analyse