Photograph a bundle of pipes end-on and the tool marks and numbers every pipe end it finds. A tap adds one it missed or removes one that is wrong, so the total is a count you have checked. The photo stays on your phone.
Stand square to the bundle, with every pipe end in the frame.
Drag the orange corners in around the pipes if the photo shows a lot else.
Every pipe found gets a numbered ring. Orange rings are worth a second look.
Zoom in and tap any pipe without a ring; the tool checks a pipe is there. Press and hold for one it cannot see.
Stand square to the bundle so the openings look round. A slight angle is corrected.
Fold the sack back so each end can be seen. A pipe the camera cannot see cannot be counted.
The tool works out the pipe size from the photo and looks for that size.
For a bigger stack, pull the box in around one part at a time, or use two photos.