You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
I had this same issue. I had to go into the icon list and tap the bluetooth icon. I had previously used spotify so no matter what I did there was no bluetooth sound coming from any media on my phone until I did this. I tried resetting EVERYTHING