Apps similar to WordBook for Android include Wordnote Dictionary, which is free and open source. Other options are iVocabulary. Between them they cover iPhone, iPad, Mac and Android.
A simple and elegant notebook to write new words and discover their meanings and synonyms. Open a new note, whether if it's for a specific book or for a new language you're learning, write the word you're looking for and see its definition and synonyms.
iVocabulary is your personal vocabulary assistant. Collect, manage and study your vocabulary and specific terms for school, University, your job or your hobby.
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