title: Retrieving Data from another running android app
body: <p>I am building an application where I would like to have a heart rate over a certain threshold trigger and event. I'm wondering if there's any way to do this by using data retrieved by another app on the phone (heart rate app) in my own application. I would rather not have to build a heart rate sensor from scratch!!</p>
  
  <p>For example, using data from an app like this : 
  <a href="https://play.google.com/store/apps/details?id=com.macropinch.hydra.android&amp;hl=en" rel="nofollow">https://play.google.com/store/apps/details?id=com.macropinch.hydra.android&amp;hl=en</a></p>
  
  <p>Can I even do this? Or do I need a developers permission, or is the data output to files on the phone I can just read?</p>