With the release of the latest beta firmware update (v4.0.1125) for RainMachine Touch HD-12/16 we added Apple HomeKit support.
Once the beta firmware is installed on the RainMachine Touch HD-12/16, go and tap on:
Settings - System - Internet of Things - Apple HomeKit - Enter pairing mode
The Apple HomeKit code and QR will be generated on the RainMachine Touch HD-12/16 screen and all you have to do is to scan it with the Apple iPhone/iPad camera using Apple Home app.

For more information please follow this link.

Thank you for your patience,
RainMachine Support