Wordinarius Pro app for iPhone and iPad

"Wordinarius Pro" is a multi-language vocabulary trainer. It has one of the most comprehensive "Frequently Used Vocabulary" database in 6 languages (English, German, French, Italian, Spanish, and Turkish). The word-lists have been prepared by language teachers and linguists using scientific research and frequency analysis. It offers you 3 main vocabulary lists: General Vocabulary (5000 words), Academic Vocabulary (3000 words), and Topic Vocabulary (3000 words). You can also create your custom-lists by adding new words manually or by importing a complete list from an external file. Once you start studying the lists, Wordinarius stores your "Known" and "Unknown" words so that you can do exercises. You can also do exercises from your custom lists.