There are two bugs I found them
1- Mathstudio (both Android and Online) doesn't caculate the Limit of a piecewise function.
And the error I see:
Error: (3). Can't find this limit
2- When I plot a function, it doesn't delete the undifined points from the result.
For examle when I plot:
It should delete the point (0,1) from the result. There are other examples for this, too.