This Offline English to Khmer Dictionary app is developed to support language learners to improve their Khmer and English Language skills due to its wide range of word stock. The structure and easy usage of this modern bilingual dictionary is quite motivating for learners. With this dictionary they can develop their word stock by learning new words and phrases, synonyms and antonyms, grammatical structures, means of word formation and still more. This dictionary can also be used just to translate texts, words and phrases both from formal and informal speech. With this Offline English to Khmer Dictionary app language learning process will become easier, faster and more effective.