It's exactly what I've been looking for to track down the changes that were made in the theme code. This should be included as a standard feature as part of Shopify, IMHO. Thank you for providing this useful tool to us!

This is a mind-bogglingly awesome tool for anyone who customizes their themes. The fact that Shopify codes their themes so that customizations break automatic upgrading is idiotic. They should use a parent/child system like WordPress. This app functions like any other diff tool, but it's built right into your Shopify admin like it was coded there by default (and should be). No need to download theme files and find differences, this tool does it all right in the Shopify admin, and will even open files in the Shopify online code editor if need be. Cannot thank the developers enough for this tool. Upgrading my theme was a major pain in the neck because of some slight theme edits. This tool has made that process immensely easier. Please add a tip jar to the app!

Incredibly simple and easy to use. Clearly shows all code, what's changed, how's it changed, and where it's changed at. The perfect companion for checking your theme, especially if you have custom code and are doing a theme upgrade. Huge thanks to the developers!

I am so excited to find this app, and it works well. Comparing build versions of my theme is fast and easy, it shows the results in a clear and easy-to-use way. My deployments will be easy and safe from now on. Awesome and thanks to the developers!!

This app is essential for teams with multiple people working on a site, making changes in the theme customizer while we have developers working on code. It should really be OOB Shopify functionality.

Cannot recommend this app enough - its functionality should be built into Shopify. Works flawlessly, with zero fuss or explanation needed. An absolute must have when updating themes. Thank you so much for creating this!