RH Sözlük is an Android application designed by Remzi Hoca, a well-known name in the field of YDS and YÖKDİL online education. It is a free and ad-free dictionary that is perfect for those who are preparing for English language tests. The application offers both word search and word study options.

With RH Sözlük, you can search for words in both Turkish and English and use various search options such as typing, voice, or image search. You can also easily access the last searched words. The application provides you with a wealth of information about the searched word, including its Turkish or English equivalent, type, synonyms, usage examples, pronunciation, visual aid, alternative translations, usage frequency, and information on whether it is a correct answer in exams.

RH Sözlük also serves as a word learning tool. You can receive notifications of words to learn regularly and review them at a time and frequency determined by you. Additionally, you can add any word of your choice to your learning list. The application keeps separate lists of words you will learn and words you have learned.

Overall, RH Sözlük is an excellent application for those preparing for English language tests. It is user-friendly, comprehensive, and completely free.