The app would start recording only after you turn on the ATC pop ups.

See this step by step video: https://www.youtube.com/watch?v=16v0jgZPvh4

or follow these steps to test it:

1) Enable "Add to Cart" pop ups

2) Save (bottom right purple button)

3) Visit your store and head over to a product page. Click "Add to Cart".

4) Close the window

5) Open your store in a new window

-> See the pop up.