Their website refers to remastering, yet this appears to be an upsampling app, and has absolutely nothing to do with the remastering of an original source.
That’s rather misleading, and makes me suspicious about such a company. Moreover, it is unlikely to achieve anything you can’t already achieve with Roon, hardware DSP, upsampling software, e.g., HQPlayer, or a DACs internal taps / upsampling features.
Any further discussion about the merits of this product should be created as a linked topic so as not to dilute the OP.
I’d also request that when posting about something in future, please provide more than just a URL and minimal commentary. Thanks.