Daniel Maiorano,s AT wizard is a Bluetooth driven device that can Measure a Angle and or Throw on of of your surfaces.

Angle & Throw Wizard 2.0
. Measure your Throws in MM / inch / degrees
. Bluetooth
. IOS and Android supported
. rechargeable no cables needed! Build in Lipo cell up to 4 hours on time / auto shutt off
. no Binding needed / instant connection!
. very small! Length 40mm x Width 26mm x High 11mm
. Recharge thru mini USB Cable.

. you can use up to  4 units at the same time!

Usage : 
1.turn on device(s) / Start app 
2. Type in your Chord Length.
3. place it on the Hinge line somewhere on the surface that 
needs to be measured.
DONE!
it will show your throws eather in MM or degrees and inches.