Shopify app for designing wood signs

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Hi Folks,  My wife and I bought a Glowforge to make wooden signs with.  I found a competitor on shopify who has an app that allows people to enter in the text and font and have it show up on an image of a wood board.  I started looking in the app store but there's a ton of stuff in there for customization so I was hoping someone was already familiar with it.  Is there a way to view the source code of the page that the app is on figure out which app it is?  Thanks!