The Tado smart thermostat provides pretty good support through its Universal Windows App and its latest update, to version 2.11.12
The update appears to be minor and comes without a new changelog. The last one read:
Various UI, stability and performance improvements.
The company has promised Live Tile support and a better optimised UI for tablets, though neither of these appear to have arrived yet.
You can pick up a Tado for only £180 at Amazon UK here, and the app can be found in the Windows Store here.
Developer: tado.
Price: Free