Not bad
Okay for the average user, it’s a useful app, you are able to essentially turn the boiler or heat pump on and off and change a few settings but not all. Unfortunately, it doesn’t mirror all the functionality /information as on the Halo thermostat or the pre-plumbed hot cylinder interface. Certainly, I would like to see the scop reading on the app and energy efficiency for 1/7/30/356 days!! which for me is imperative and sole reason of downloading app.