The Apps reed pressure gauge lets you measure the strength of your chanter reeds exactly.  Insert the chanter and reed in one end and blow into the other. Blow until the reed sounds its best and take a reading from the gauge. Once you’ve discovered what strength you are most comfortable with you can use that information to:
 
Order chanter reeds set to your special strength
Measure all back up reeds and adjust so that they are ready if and when the need arises.
 
Measure the whole band and improve your sound. Take a measurement of all band pipers and order reeds set for each. You could also have a spare reed ready for each band member. No reeds will be unused. No money will be wasted. Everyone will be happy with their reed. A win, win, win.
The gauge is 3D printed using carbon fiber.