"PES: Practice English Speaking" is a mobile application developed by Thang Ngo for iPhone users. The app aims to help individuals improve their spoken English skills without the need to travel abroad. The developer shares a personal story of struggling with English communication and eventually mastering the language through specific strategies.

Thang Ngo emphasizes two key steps for enhancing English speaking proficiency. Firstly, users are encouraged to practice speaking skills like forming statements, asking questions, and expressing ideas through English speaking lessons. Secondly, the app suggests using the Imitation Technique to expand one's speaking vocabulary. By following these steps, users can strive towards fluency in English.