A:AnswerThere is approximately 1.65" between the TV and the surface it is sitting on when the stand legs are connected. The sizing will be different for different manufacturers.
A:AnswerIt will work with a wallmount. Any VESA standard mount that fits the specifications of weight and wallmount foot print (measured in mm) will work.
A:AnswerWe do not have an app store on our TVs to add different applications but if the Spectrum TV app is chromecast enabled you would be able to cast it to the TV. We also support Apple AirPlay 2 so you can use that if the app supports AirPlay.