Pro Learns, and can adjust to weather as well as your home
After a couple weeks of learning, you can switch to a PID (proportional integral derivative) control. This uses predictive and learned behavior to provide the best heating experience possible.
PID control looks at weather conditions, and adjusts its cycling to compensate for it. For example, if a sudden cold front is expected, the system will turn on earlier than normal to ensure the temperature stays at a comfortable level.
Also, PID takes into consideration your house's insulation properties, which let it perform better than merely waiting until the temperature reaches the upper/lower setpoint values.
Pro Energy tracking built-in
You will be able to view energy reports from the daily, weekly, monthly or yearly view. This can help you save up to 37% on your power bill (and help pay off the thermostat itself) by recognizing high power times and adjusting the temperature to save power during those times.
Pro Works with Android, iOS, Windows Phone, and has a web app
No matter if your family is divided across mobile platforms, everybody can still control the Netatmo Thermostat. There is also a web app, so it can be controlled using a computer or on other phones and tablets by logging in to the web app.
Con Hardware feels basic
While other smart thermostats let you use the thermostat itself for virtually any adjustments, the Netatmo Thermostat only displays the setpoint temperature (in bold black) and the current temperature (outlined).
The display is E-ink, which doesn't look as good as good as LCDs and can't display colours. Also, there is no backlight making it impossible to see with the lights off.