No Device Found! – FHR Monitor Review

I downloaded the app and keep getting a No Device Found pop up! It's installed I'm staring at it but not even getting to hear some funky noise pretending to be the baby. So that's upsetting. Why have an app if the device can't be found! I have an iPhone 6s Plus... Isn't the app for iPhones?
Review by DuckNuggets on FHR Monitor.