OK, in order!
1. No app that provides widgets yet, but I am sure that will come.
2. Yes, can be used outside but if in an exposed position we recommend that you purchase the additional davis screen from Ecowitt to place it in.
3. I am pretty sure that you can change the units you measure/display
4. No, the sensor array uses a super capacitor to power the array and the batteries are for when the capacitor is depleted (ie Nighttime or dark winter days). So no rechargeables, we recommend that you use lithium AA cells for the sensor array.
5. Yes, you can see this on the Console in settings and also in the WS-View app sensor ID page. Though not all sensors report battery status I think.
6. GW1000Live is the latest app to use on Android to view the GW1000 data. Otherwise if you have a raspberry Pi, you can use a number of app to read the GW1000 such as CumulusMX and WeatherDisplay and WeeWx
7. Only the primary sensor array gets uploaded to Wunderground
8. Ecowitt.net is the best as that records and displays all available data you have.
Hope that helps
2. I've placed it inside a small house for our cat untill further.
3. I've managed to find the pleace to change the temperature unit, but i cannot seem to find anything about wind speed units? It seems to be measured in km/h and i usually read it as m/s
4. That is very neat ! How often do you change batteries ?
5. Not sure where the "Console in settings" is ? Is it in the webinterface of ecowitt or? In the WS-View app, i can only find signal strength information under the Sensors ID. They always seem to report full signal though, but maybe that is actually the case. Just wasn't as good with my netatmo sensors at the same places.
6. I'll take a look at that app

1. Although not a widget, I set a home screen icon shortcut with Chrome on Android. It looks like an app in this regard and quickly gets me to Ecowitt.net. There is also the WU app you can install for main sensors. The WU app is currently in the middle of a redesign. You can also try the GW1000live app that is also in development by Brian of Weather-Display.
2. You already have an outdoor sensor for temperature. Not very many cases where you would need a second outdoor sensor....unless you had an outdoor area that would have a different temperature than the normal outdoor ambient temperature. Ecowitt has a radiation shield part you can use RS-00001
3. In WU you can click on the gear icon on the top right and then select °F or °C and it will change all units between imperial and metric.
4. The batteries are only used when the super capacitor is insufficient (on really cloudy days)
8. Although Ecowitt.net is the only directly supported service that will show you all your sensors there is a way to add to your station to get these sensors to show up in other places. You can use a Meteobridge and then license it for Ambientweather.net and then all the sensors show up there. Ambientweather.net is like Ecowitt.net very much in look and feel as they are cut from the same cloth. But Ambientweather.net has some added API features where it will integrate with Alexa and Google Assistant and other 3rd party software. You can also use software like Cumulus MX, Weather-Display to see your sensors.
1. That might be a solution for now.
2. I've placed the sensor array on top of my roof though, and i believe that is way to high for accurate temperature measurements. That was why i thought it would be a good idea to have another sensor outside close to the ground.
3. Look above
4. Look above
8. I will take a look at meteobridge. Could i register my WPS on AmbientWeather already?