나무뷰어 is a free iPhone app developed by Geun-hyeok Jang in the Education & Reference category. This app offers a clean Wikipedia viewing experience without any ads, including blocking ads from the 나무위키 site. Users can block ads, add frequently read articles to bookmarks, view document contents without scrolling, and enjoy various themes including a dark mode. Additionally, the app supports long-pressing the home screen icon to jump to a random article, viewing external web pages within the app, and utilizing Bluetooth keyboard shortcuts. URL Scheme support is also included.

However, it's important to note that offline viewing is not currently supported, and this app is not the official Wikipedia app.