In addition to HomeKit, the ecobee3 can hook up with IFTTT (IF This Then That - an automation tool based on custom recopies), Alexa (Amazon's voice activated personal assistant found in it's Echo line of products), Wink (a stand-alone ecosystem) as well as SmartThings (Samsung's smart...
The satellite sensor is handy, but it adds another connection point which can disconnect (and based on user reviews, it can do so frequently even when installed within 5 meters of the main thermostat).
If your system lacks the common (C) wire and is only a 4 wire system, you will need to use the included Power Extender Kit (5-wire systems don't require this). Then, additional steps are required depending if your HVAC system has a controller board or not.
The Nest thermostat looks like a piece of tech from the future. It's fully circular and certainly looks the part of a smart thermostat. The display takes up the majority of the unit, and makes good use of its LCD display when not in use. It can display an analog or digital clock instead of the
Nest begins learning as soon as you install it. In a short time, it will automatically be adjusting your temperature based on time of day, or how active the house is. For the first few weeks you may need to adjust the Nest a few degrees when required, but eventually it will learn when you adjust it
The Nest Thermostat doesn't have any other hardware that integrates into it. That means that it only senses temperature from a single point, which means that there can be cool/hot spots in other rooms where the temperature isn't being taken.
There is an Android app, an iOS app, and even a Windows Phone app. There is also a web app that lets you control the thermostat from any web browser. This is a thermostat that you won't need to worry about compatibility with.
Tado suggests you get the wiring done professionally. While it's convenient that there is a conversation between you and Tado to figure things out ahead of time - making sure the installation itself goes well - it's inconvenient that you need to have it set up professionally when the other...
The thermostat is minimal, and it lacks the functionality of normal thermostats if you want to control it through the physical wall mounted unit. Just about all of the controls will need to be done through the app.
If there was an extreme temperature change, Honeywell lets you know. It can also notify you when it's time to change your air filter. Notifications like these are a nice addition, as it keeps you in the loop about what's going on with your house.
While the UI is very functional, it appears cluttered as it tries to display a bunch of information all on the same display. On the main screen, there are 4 tabs on top, two buttons to adjust the setpoint, and it displays the current indoor temperature as well. On the left it displays current info...
While most smart thermostats go the full mile when it comes to futuristic design, this Sensi thermostat takes a more traditional approach. Just by looking at it, you wouldn't be able to tell that this is a smart thermostat.
This thermostat doesn't offer any smart learning or automation. While it does allow you to program a schedule into it and adjust the temperature remotely, that's just about the extent of its smarts. It doesn't offer motion sensors or track your location in any way.