Here are some tips for better images:

Tip 1: We use square images in the app. Please ensure that the element is fully visible in the cropped image.
Bad ❌ 
Bad ❌ 
Good ✅
Good ✅

Tip 2: Ensure that the image is sharp. If your phone does not focus properly, try to move further away from the object and zoom in.
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Bad ❌ 

Tip 3: Ensure that there is no shadow on top of the object.
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Bad ❌ 

Tip 4: Please use a uniform background color. A piece of paper can help.
Good ✅
Good ✅