A free program for Android, by Jean-Yves Oberlé.
Lovemaths is a free application for the study of mathematical functions and their graphs, the calculation of integrals, the search for antiderivatives, and the solving of equations and inequalities. The program also includes the option to calculate the integral, calculate the derivative, and solve the equation.
The function that you want to study can be the value, the graph, or the integral. You can choose between the three modes. In the first mode, you can study the function by entering the values in the first text box and choosing the mode. In the second text box, you can enter the lower and upper bounds of the integral, and in the third text box, you can enter the left hand side and the right hand side of the equation. Then you will have to choose the = sign to get the solutions of the equation, and you will have to choose the = sign to get the solutions of the inequality.
