Have not found another app like this for removing lens distortion. – SKRWT Review

If you have photos of square things, like buildings, that have perspective distorted this is your go to program! Developers, please make the four points module available to the edit menu of photos like SKRWT is. Four points is my favorite part of the app! I use it all the time to correct perspective.
Review by BitsOfCode on SKRWT.