The app supports 4 reading themes, is privacy friendly, includes: truly private reading history, trending articles, a persistent TOC on iPad, on this day in history, language and multilingual support, in the news, random articles, bookmarking and folder-ing capabilities, a way to view Wikipedia articles on an interactive map, a wikitext editor with syntax highlighting, updated article history views (with easy to read diffs), widgets, predictive search (you can even search with emojis if you please) and very soon editing notifications.
We're a small team (1.5 designers, 3 engineers, an engineering manager and a PM) and we're really passionate about making a beautiful and usable experience for readers and contributors on iOS.
I'm the lead designer/design manager and have worked on this project for five years. Commenting just as myself though (thoughts are my own and not the Foundation's), as a person who loves Wikipedia and design and is proud of the work my coworkers have done.
If you're interested you can check the app out here: https://apps.apple.com/us/app/wikipedia/id324715238