Darren Wolfgang answered
The Nest Learning Thermostat's ability to program itself and extensive smart home compatibility make it the best smartthermostat you can currently buy. At $250, the Nest LearningThermostat is one of the most expensive thermostatsavailable. It costs $70 more than the average $180 smartthermostat
Is there a monthly fee for Nest thermostat?
Also, depending on the options you choose, you might have a recurring monthly fee. If you wish to use the Nest Aware feature, you will have to shell out an additional $10 per month. But, if you wish to purchase this service in advance you can pay a yearly subscription at $100.
Do Nest thermostats really save money?
The results were clear: On average the Nest Thermostat saved 10% to 12% on heating and 15% on cooling. Based on typical energy costs, we've estimated average savings of $131 to $145 a year. That means the Nest Thermostat paid for itself in under two years. $131 to $145 estimated average savings per year.
Nest Third-Generation Thermostat Review 2019
https://www.toptenreviews.com/home/smart-home/best-programmable-thermostats/nest-review/
