Game Controller Test can show digitized value of axis movement. You can see sensitivity of the Controller by value (not just by feeling).
1) Buttons On/Off will be shown. (You can see when button is really triggered)
2) Axis movement will be digitized to 3 decimal place.
(Axis movement should be between 1.000 to -1.000)
3) Device/Controller will be automatic detected and shown.
Remark: Test for MFi controller only