Runblox is a free Android app created by Tigertech AB that offers a set of simple yet useful tools for runners and athletes. With this app, you can easily calculate your pace, time, and distance, and predict future race finish times based on a recent run. Additionally, the app has converters that will help you switch from metric to imperial units for distance and speed.

The interface is user-friendly and intuitive, making it easy for anyone to use. The app is designed to make running and tracking your progress easier, and it does just that. The tools are straightforward, and the app's performance is smooth and quick. Overall, Runblox is a must-have for runners and athletes who need a set of reliable tools to help them with their training and races.