Firebase Analytics and Ionic 2

I have an Android and iPhone app that are powered by AppPresser and Wordpress and are ran by Ionic Framework 2 and Angular. I need to have someone add the Firebase Analytics tracking into my app so that I can track my traffic for the mobile app. I then need someone to explain to me how they added the code so that I can back it up and add it to future updates manually. This job should be very easy for someone who knows what they are doing and should only take a couple of hours at most.