Online Competition is a free Android application developed by Workholics InfoCorp that focuses on improving mental arithmetic skills. This app is specifically designed for students who want to sharpen their arithmetic skills or prepare for abacus-based competitions.

The app offers four different modes of arithmetic operations: addition, subtraction, multiplication, and division. Users can choose to practice any one of these operations or a combination of them. The app provides a timer for each question, and users can track their progress by checking their scores. The app also offers a feature to review the answers, which allows users to identify their mistakes and learn from them.

The user interface of the app is very simple and user-friendly. The app is designed to be accessible to users of all ages. Overall, Online Competition is an excellent app for students who want to improve their arithmetic skills and prepare for abacus-based competitions.