I can't feel any hugs – HUG! Review

My girlfriend and I installed the app on our respective iPhones and added each other via the username search (we did not sign in through Facebook). We've tried sending "hugs" but the recipient never feels anything. The app is supposed to use haptic feedback for simulating hugs when it senses the user holding the phone up to their chest. The sensor works, since it recognizes when you put your phone in the correct position and starts counting down. But, that just leaves you foolishly clutching your phone to your chest, there's no feedback. I can't find a setting to fix this issue.
Review by Achreja on HUG!.