Clear blue connect

I have been trying to conceive for two months now for baby number one. I was wondering How many people use clear blue connect I am new to it and giving it ago so far I have gotten two flashing smiley faces which I know means fertile window. Just wanted to hear others story’s on using this does it help I know the fertile window from the test sticks are way off from the app. Which one do I trust?( I am assuming trust the sticks)

What have others experienced with these.

Expensive digital test sticks!