What is Reddit's opinion of Surface 3D Plot Lite?

From 3.5 billion Reddit comments

>Hey /r/math someone told me that you all might like this. > >So after working as a physicist for 40 some years, my dad decided to retire and make apps for fun. Here's his most recent one: Surface3D Plot. It can create a 3d representation of any function from: sin(x^(2)+2y)-ln(abs(x)) to 1-abs(x+y)-abs(y-x) > > ^^^^^ > >PlayStore Link (free) --> Surface3D Plot Lite > > >Some of the cool graphs you can make: > >sin(x2+2y)-ln(abs(x)) > >1-abs(x+y)-abs(y-x) > > > >If you have any questions or suggestions, let me know. If you can see yourself using the app, pm me and I'll send you a code for the ad free version. (I'm out of them right now but I'll get back to you when I get more)

>Hey /r/math someone told me that you all might like this. > >So after working as a physicist for 40 some years, my dad decided to retire and make apps for fun. Here's his most recent one: Surface3D Plot. It can create a 3d representation of any function from: sin(x^(2)+2y)-ln(abs(x)) to 1-abs(x+y)-abs(y-x) > > ^^^^^ > >PlayStore Link (free) --> Surface3D Plot Lite > > >Some of the cool graphs you can make: > >sin(x2+2y)-ln(abs(x)) > >1-abs(x+y)-abs(y-x) > > > >If you have any questions or suggestions, let me know. If you can see yourself using the app, pm me and I'll send you a code for the ad free version. (I'm out of them right now but I'll get back to you when I get more)