Printed checkerboard mounted to a flat surface This checkerboard worked great for us. It is important to mount the checkerboard to a flat surface (e.g., plexiglass sheet) and not to cover it with a reflective surface (e.g., don't laminate it).
Install app
Step 01
Install the TestFlight app from the App Store
Step 02
Install the OpenCap app by scanning this QR code or by using this link