This app was made to help test and evaluate your controller's sticks.
Identify the analog axes of your stick on the bars below and assign the desired axes to the heatmap graph on the left.
You can use the heatmap to test whether your stick is not maxing out consistently in all directions, jumping around erraticaly,
or resting off-center when neutral (drift). Example here.
For reference, there are circles at 25% and 100%.
Refer to this video for how you can conduct a drift test.
You can right click to save the heatmap image.
Use the graph at the bottom to analyze the performance of each axis in real time. Click in the legend to show/hide the ones you want.

Important: The app does not support multiple controllers connected at the same time!