Yet Another PWA JNC Client
Yeah, there is one. Thought about it when Shiny mentioned it, and since I'm already checking the times on that API in a few places, it should be straightforward, will take a look.
I personally already know the times when parts get released so I just open the app at that point.
Checking when new novels are released (usually on the hour) would be great. It might need to check again a few minutes later as well unless the release was slightly later due to clock mismatch.