I've developed an app that will track calls and fire your Google Pixel, Facebook Pixel based on how long someone stays on the phone. This means you can create a "thank you" landing page - then after someone makes a call on their smart phone.... they'll automatically be redirected to that "thank you" page and thus fire the Google/FB pixel. This means you can build better custom audiences based on call duration (instead of clicks) and it means you can now use Google Display Network to promote pay per call offers and have Google Optimize using the data it gets from the people that hit your "thank you" page. Anyways..... I'm looking for beta testers. You must be already familiar with pay per call. You must be willing to leave a review when we go live... and also give me some feedback on how to improve the app (before we go live) If you are interested - please post below.