Displaying Sensor Data (GUI)

Hi,

I am searching for an easy solution to convert the data from two temperature sensors (Arduino) to a Graphical User Interface on an App (no matter if Android or iOS).

I have worked with Processing but I am not quite happy with the results. Is there a more visual way of programming a GUI for Arduino?

Thank you for your help!

For free, probably not. However the best GUI is a program called LabView.