Immersion Reader is a free iPhone application developed by Mathew Chan. Designed specifically for Japanese language learners, this app offers a range of features to enhance your reading experience and improve your vocabulary.

With just one tap, Immersion Reader allows you to look up words in Japanese ebooks. This feature is incredibly useful for learners who want to quickly understand the meaning of unfamiliar words while reading. Additionally, the app includes tabs that help you look up neighboring words, allowing you to gain a deeper understanding of the context.

One standout feature of Immersion Reader is its ability to import Yomichan dictionaries and frequency dictionaries. This allows users to access a wide range of resources and expand their vocabulary even further. Furthermore, the app offers the option to export saved vocabulary to Anki via Anki Dojo, allowing for seamless integration with other language learning tools.

To cater to different preferences, Immersion Reader provides light mode, dark mode, and other themes for the dictionary. This ensures that users can customize their reading experience and create a comfortable environment for language learning.

Overall, Immersion Reader is a powerful tool for Japanese language learners. Its intuitive interface and extensive features make it an invaluable asset for those looking to improve their reading skills and expand their vocabulary.