When comparing iDevices Thermostat vs Elgato Eve Thermo, the Slant community recommends Elgato Eve Thermo for most people. In the question“What are the best HomeKit thermostats?” Elgato Eve Thermo is ranked 4th while iDevices Thermostat is ranked 5th. The most important reason people chose Elgato Eve Thermo is:
Because each Eve Thermo is assigned to a single room, it can accomplish a steadier temperature than a single central thermostat. You can assign each room to a different schedule, for example your bedroom heater can be turned off during the day while the rest of your house receives the heat instead.
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Pros
Pro Affordable price for a basic HomeKit thermostat.
This thermostat is priced about $100 cheaper than any other option that currently integrates with HomeKit. For users who don't want/wouldn't use any fancy features but just want great Siri integration, this thermostat will suffice and at a more wallet-friendly price.
Pro More features in the works
While this thermostat is very feature-light at the moment, Bluetooth hardware is present which will allow for more features in the future. Geo-fencing and pattern recognition software are two features currently in development, however the other thermostats already offer these features and more.
Pro Room-by-room control, scheduling, and heating
Because each Eve Thermo is assigned to a single room, it can accomplish a steadier temperature than a single central thermostat. You can assign each room to a different schedule, for example your bedroom heater can be turned off during the day while the rest of your house receives the heat instead.
Pro Small, sleek looking hardware
The Eve Thermo is physically small, and plugs into your heaters which are usually hidden out of sight. This allows it to discreetly add smart heating to your house without creating an eye-sore on a prominent wall.
If the device is in a location where it will be seen however, it looks very sleek with it's polished white colour and rounded square design.
Cons
Con Multiple touches required for simple actions
Because the screen is so small and pixelated, very little can be displayed on the screen at one time. This forces the menus to be longer, which requires more button presses to scroll down and then select the action, and then finally adjust it. It would also be helpful if text was used instead of just icons, as then you'd never have to guess what an icon represents.
Con Lacks any standout features
As of right now (future updates could change this), the iDevices thermostat doesn't provide any compelling reason to choose it over any other HomeKit thermostat. It doesn't add any features of its own - instead it only has features provided by HomeKit itself which are present on many other thermostats. The screen is small and pixelated, and it still uses buttons instead of a touchscreen. It also looks more like a standard thermostat than the others.
Overall, the iDevices thermostat may be the cheapest option, but it's very uninspiring.
Con Installation is harder than it should be
Wiring the iDevices Thermostat requires a small precision screw driver (not included), and unlike many other smart thermostats it doesn't automatically detect which HVAC system you have (you will need to look that up, whether it's gas or electric fired, and potentially what kind of pumps and valves are used). The whole installation process is a lot more involved than other smart thermostats.
Con Only available in the UK
Con Not a whole-house unit
The Eve Thermo only connects to a single heating element. That means that for your entire house to be heated this way, you'd need one Thermo for every room in your house - at which point it would be much more cost-effective to get a single smart thermostat.
The Eve Thermo is better suited as a complementary device - one that is installed alongside your current (or future) thermostat. The Eve Thermo works very well when it comes to regulating temperature in a tricky room (where a normal thermostat leaves it either too warm or too cold), and that is where it excels.
Con Powered by disposable AA batteries
The battery life is expected to be about 8 months, which is pretty good. However, you will need to replace the batteries from time to time which also adds to the overall cost of this product.
Con Limited control distance
The Eve Thermo only connects via Bluetooth, and has a short range (~4 meters). You won't be able to adjust the temperature from outside the room, unless you have an Apple TV 3rd gen (the Apple TV hooks up to the Thermo, and allows control through Wi-Fi which can be accessed and adjusted from anywhere in the world with an internet connection).