Great app, still place for improvement

This app is fantastic. I finally got to understand some integrals. I must say, however, that it has some flaws, like the glitchy backspace button, or the difficulty of inputting some hard integrals, or the fact that on wrong input it deletes the already written integral, so I have to rewrite the whole thing.

Otherwise, great app.

Robert N. D. about Wolfram Calculus Course Assistant