It only works if you have a single unit.

If you have a single NEST this works well. If you have more than one, like I do, it seems to pick up random one after each restart. Hopefully it can be updated to support multiple units in the future? Otherwise I would recommend using the other app in the appstore that does support multiple NEST units if you need tha functionality like I did. Ill give it 4 stars for working well if you have a single nest.

Aldo_Cella about Thermobar