Trigger switch with temperature

Hey all, need some help accomplishing the following:

I am building an insulated dog house for our outdoor dog. This winter is predicted to be colder than the last. So, on top of insulation, I am going to heat the dog house as needed. What I would like to do is:

Put a z-wave temp sensor in the dog house. When temp in the house drops to X degrees, trigger a z-wave outlet to turn on, which drives the heating element.

Once temp gets above X degrees, turn heating element off.

Is this doable? I know parts are available, but trying to figure out what smart app can be created around it.

I wrote a thermostat app that could work. the one thermostat.