Update: I tried doing the whole
Un-pairing and deleting and re-pairing thing. It didnt work.
What I did find that finally worked was this: make sure that the H7 is turned on by snapping it onto the chest strap, then moisten the electrodes and put it on your body. DO NOT PAIR IT WITH YOUR PHONE THROUGH BLUETOOTH SETTINGS (yet.) Instead, open the Polar app and go to settings menu and then select HR strap and it will pair there inside the app. THEN you can go into your phones Bluetooth settings and pair it there. Voila.. The chest straps readings are now showing up in my Polar app, Health app and on my Polar app for Apple Watch.
Welp.. I was hoping the reviews were wrong. Unfortunately, they are not. My brand new Polar H7 hrm will not pair with the Polar app. It is connected to my brand new iPhone 6s Plus via Bluetooth and my Health app is picking up my heart rate from it. The Polar app itself says that there is no hrm connected and when I search for a connection it just gives me an error (giant exclamation mark!)
stephcon about Polar Beat: Running & Fitness