We have added and published the product page for the macOS / iOS app MDX Flow.
MDX Flow is a macOS / iOS music player for X68000 MDX-format songs. It plays YM2151 (OPM) FM and PDX ADPCM samples with an in-house engine. There are no ads at all, and MDX playback with every feature around it is available without any purchase.
For features and usage, see the MDX Flow product page.