Make sure that you are using a neoStat WIFI, there should be a WIFI sticker underneath the unit where the single screw is. Is there is no WIFI sticker, then it is not a neoStat WIFI and you would need a neoHub to have App control.
Give your router a reboot. Then try again afterwards.
If you are finding no WIFI networks are showing when you try and scan for them, again reboot your router and ensure that you have enabled Location in the App.