Elgato Eve Energy vs Parce One

You can easily view how much energy the plugged in device is using (in watts), however the app doesn't show the costs of the power (you can figure this out yourself, but it would have been nice to be included).

HomeKit is created by Apple, and uses Siri to control the smart devices connected with HomeKit. It also allows for grouping devices so that a single command can trigger different devices to do different things.

Setup is as easy as downloading the Eve app, add the device, type in a code (or scan it automatically), and tell it where it is located (easier to control down the road).

The Eve Energy supports a useful scheduling function. Once set up, the lights will turn themselves on and off automatically based on your preferences.

After being used for a while, the Parce One will eventually start learning your habits, and can start turning devices off automatically when you forget to turn them off yourself. It's fairly conservative, although if you stay up a few extra minutes than normal, the lights may turn off before you're done with them - however this is to expected from any self-taught schedule.

Parce One tracks the energy used by the device that is plugged into it. It displays the information it gathers into an easy to read graphs, and even can make suggestions over time that can help reduce the power bill.

HomeKit is deeply integrated with Siri, which makes turning connected devices on or off is as simple as asking Siri. You can also group devices into a 'scene' - for example, once configured saying "OK Siri, go to bed" can turn off all your lights, adjust your thermostat, and lock all your doors with just one action.