Thank u soo much for this app, it is completly free and you can do any type of math on it. This is where you take a photo of the equation and it solves it, this works really well for my son it not only gives the answer but it shows the steps and you can also push the back button and it goes back bit by bit which is really useful and he said he he is able to learn at a pace that makes him feel comfortable instead of being left pressured and mystified.