@SunsetRunner I moved your post into it's own thread as it was unrelated to the issue in the previous thread and will receive better attention here.
As per the Android app release thread, the 2.17 app update is only available for devices on Android 4.3+, so you may not see it if your M8 isn't on that version of the Android OS.
In order to get call notiifcations, I recommend following the instructions in this help article to set them up with your Charge HR.
As for seeing real-time heart rate, you will only see it in the app once you've bonded your device for call notifications, as is explained here. See you around.
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