Grammar Buddy is a free Android application developed by Go4 Solutions that helps users learn English grammar in Sinhala language. It is currently ranked #1 under the Education category (Top Free) on Google Play, with over 10,000 downloads within just one month of its release and an excellent user rating.

This application is the first and only one of its kind, designed specifically for Sinhala speakers who want to improve their English grammar skills. With Grammar Buddy, users can fully customize sentences and observe their patterns, covering both Active Voice and Passive Voice. The application is able to construct positive sentences, negative sentences, positive questions, and negative questions of each tense.

Overall, Grammar Buddy is a great tool for Sinhala speakers who are looking to improve their English grammar skills. Its user-friendly interface and customization options make it easy to use and understand. Don't forget to rate the app with 5 stars and stay tuned for more updates.