ex.ra is a free Android application developed by jinseon, designed to provide mechanics formulas for civil engineers. The app features formulas for force, Varignon, Bucking, deflection angle, and deflection. These formulas are essential for civil engineers to make precise calculations in their field of work.

The user interface of the app is straightforward and easy to use. The formulas are arranged in a clear and concise manner, making it easy for the user to find the required formula. The app is compatible with Android 9.0, making it accessible to a wide range of users.

Overall, ex.ra is a useful app for civil engineers who require quick access to mechanics formulas. It is a helpful tool that can save time and effort in calculations, making it a must-have for professionals in the field. Thank you for downloading ex.ra.