Man, I spend way too much time scrolling through apps looking for my next read, so I've seen this shift firsthand. Webnovel and Inkitt feel like the big, crowded marketplaces now—lots of traffic, tons of updates. But the real momentum for ongoing pommu seems to be on dedicated community apps like Radish and Dreame. They've got that serialized, episode-driven model locked down. It's all about the daily drop, the cliffhangers, the reader comments fueling the next chapter.
I'd throw Yonder into the mix too, especially if we're talking about official, professionally translated Korean stuff. They're aggressive with promos and their library is growing fast. The reading experience is slick, though the coin system can feel a bit pricey compared to some ad-supported models.
Honestly, 'popular' depends on the subgenre. For fantasy pommu, you might find deeper archives on sites like Scribble Hub. But for the mainstream romance or office drama serials that update constantly, my phone's home screen is just Radish and Dreame these days.