504 Essential Words is a practical learning tool to help you expand your vocabulary and knowledge about the English language. This tool not only provides translations from Persian to English and vice versa but also includes techniques to make learning easier and more effective. You will learn about the most commonly used words you can use for practical communication.

This comprehensive app also has a built-in audio system where you can check the correct pronunciation for each word. Plus, there are included tests to measure your learning development. These tests are divided between beginners and advanced learners.

This app is a great way to prepare you for IELTS tests.