This is right. We only have an ANT+ certification for the device profiles HRM and CAD (cadence without speed). Not certain yet if support for SPD+CAD is coming since BLE sensors seem preferable.
This is the only android app that appears in thisisant directory, but is incompatible with CAD sensor when the device is CAD/SPEED combined, so is not fully ANT+ operative.
I think you made a version to solve it in bluetooth, but not in ANT+. Please give a solution. Best regards