Take a photo of Window 1
Get the whole frame in shot, zoomed in as much as you like. Then tap the ends of each line.
Straighten this photo?
Get the whole frame in shot, zoomed in as much as you like. Then tap the ends of each line.
Estimates scale from the lines you have already measured, so they assume one flat face like a window or door frame.
Real T1M in keyboard mode? Pair it with this device and its readings are captured here too.