iKanji is an educational app designed for iPhone users focusing on kanji study and training. It covers over 2,000 JLPT and school grade jouyou kanji, making it an extensive resource for learners of the Japanese language. The app organizes kanji by grade and JLPT levels, providing sets of 20 for streamlined practice, alongside reference cards that detail readings, stroke counts, and radicals. Additionally, users can explore a vocabulary browser and hear pronunciations using a text-to-speech feature, enhancing the learning experience.

The application employs the Leitner System for spaced repetition in its Teach Me mode, allowing users to take reading, meaning, compound, and stroke order tests to reinforce their knowledge. iKanji also facilitates the creation of custom practice sets, enabling learners to focus on kanji they find challenging. With the option to purchase extra features from the extras store, iKanji offers a customizable and effective approach to mastering kanji.