Which iOS app should I use for reading and discovering free, niche fanfiction and serialized stories with good filtering?

Wattpad is a prominent platform for accessing a vast, community-driven library of free serialized fiction and fanfiction. Its core strength lies in an extensive categorization and tagging system that allows readers to drill down into highly specific niches, from Italian mafia romances to supernatural teen dramas. For readers seeking particular tropes or character dynamics, the search and filter functions are essential tools. The app's social features, including the ability to follow writers, comment on individual story paragraphs, and vote on chapters, foster a sense of discovery and direct engagement with authors. While the quality of writing can vary significantly, the platform's algorithm surfaces popular and trending works within each genre. A practical use case involves a reader searching for 'enemies to lovers fantasy' stories; Wattpad can deliver hundreds of results, sortable by rankings or update date, with tags providing immediate clarity on content. However, some interface quirks exist, such as the occasional bug where text may disappear when switching between apps, as noted in user reviews. Furthermore, while the tagging is robust, some users have requested more detailed metadata like word counts per story, a feature found on other writing platforms. The reading experience is highly customizable, with adjustable fonts, backgrounds, and an offline reading mode for downloaded stories. For anyone looking to dive into fan communities or explore original stories in burgeoning genres without financial commitment, Wattpad's model of free, ad-supported access is a significant draw, though the presence of ads can be a minor trade-off.