Ecuación de una recta, developed by EIE UES, is a free Android app that offers a simple yet effective tool for solving linear equations. The app's main feature is its ability to calculate the equation of a straight line using two points on the line, and express the solution in the form y=mx+b.

The interface of the app is straightforward and easy to use, making it a great choice for students and professionals alike. The app's functionality is limited to solving linear equations, but it does this task exceptionally well. Overall, Ecuación de una recta is a great tool for anyone looking to solve linear equations quickly and accurately.