EngVocLite app for iPhone and iPad
This is a Japanese-English vocabulary learning app.
This is a free demo version.
Most of English words in the app are difficult.
This app is made for Japanese, so it may not be suitable to learn Japanese words. However, there is a function called "Personal Data." You can make your own dictionary and do the quizzes to memorize. If you need to learn or study in a certain field, please use this function.