You could use the same method to track many other things if you got creative.
https://medium.com/@edwardbenson/how-i-hacked-amazon-s-5-wif...
Amazon Dash is a button that when pressed will place an order on Amazon via Wi-Fi, controllable by the Amazon App:
You may need to increase your iPhone volume, since Dash Button uses ultrasonic tones to sync with your iPhone during setup.