Make sure you're able to move around your object.
You need a good amount of floor space. If you can’t walk around your object you will need a bigger space.
Your object should be high enough so you don’t have to crouch down.
Use something like a table or high stool to rest your object on if it isn’t free standing already.
Place your object at the right height for scanning.
Your object should be well lit so it is easy for the scanner to see it.
Make sure you have a good source of light. If your object is too dark, the smartphone camera will struggle to capture it and the colour information on the screen won't make any sense.