Clearly needs much improvement
I got this app primarily to use my own function that I set up in the app. That part of this calculator is glitchy to the point of being unusable. My function required values of 8 variables to be input. Once I had the function set up (which itself was a chore with this app), I went to use it on my iPhone 23 pro. Well, I could only input values for 4 of the variables while the rest remained somewhere in the lower part of the screen where there was no way to even see them. I deleted the app, downloaded again and repeated the process with the same result. So, in short, this app did not serve me at all.