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Pro Automates itself after a learning period
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.
Pro Energy monitering
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.
Pro Apple HomeKit compatible
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.
Con Only available in Germany currently
Currently, the Parce One is only available in Germany. It uses the F plug type, which is compatible with countries listed here (USA, England, Australia and Canada don't use the same plugs).
Con iOS only at the moment
An Android app can be expected by the end of 2016, however currently there is only an iOS app.
Con LED light is always on
While an update is in the works to make this user-adjustable, the power indicator LED is always on with no option to turn it off.