Hi, new to this, so asking basic questions if you don't mind.
It shall be possible to make an android app that access regularly (or event triggered) the watch to detect HR values. I wonder if this is possible with the Android SDK and if the watch needs to be equipped with a custom IQ app or can the Android app access the HR sensor programmatically directly ?
From the documentation, it does not appear that Android apps can access the device sensors directly and can only send and receive messages from a companion app that would need to be installed on the device. Both the device and Android apps would need to be created to accomplish what you want.