I've burned through so many romance titles on my phone, and honestly, the app landscape shifts constantly. Right now, I'm leaning heavily on Radish for serialized stuff—their update schedules are brutal but addictive, like getting a chapter a day of 'His Secret Obsession' feels like a tiny hit of dopamine. The problem is the coin system; you can binge a completed story fast but then hit a paywall that feels like running into a brick wall. For a more traditional library feel, nothing beats Libby if you have a library card. It's saved me so much money, though the wait times for popular romances like Emily Henry's latest can be months long. Hoopla is its sleeper sibling—no waits, but a monthly borrow limit. If you're into the web novel and translation scene, Webnovel and Dreame are basically the storefronts for that specific itch. The translations can be janky, and the 'power stones' and daily check-ins feel game-ified in a way that's either fun or exhausting depending on my mood. Kindle Unlimited via the Kindle app is my baseline subscription; the selection is massive but can be hit or miss, and I find their recommendation algorithm less sharp than, say, Goodreads (which isn't a reading app per se, but essential for discovery).
Ultimately, I juggle between them. Radish for the 'what's happening right now' serialized thrill, Libby for the big publisher releases I'm willing to wait for, and Kindle for deep-dive binges into trope-specific categories. No single app does it all, which is frustrating but also part of the fun—hunting across platforms is its own kind of romance plot.