Copywriting Comparison Tool

 Do you often find yourselves with not just multiple versions of pieces, but multiple versions of each line in something like an email, article, or landing page?

I'm envisioning an app that lets you input/import multiple lines of copy, with multiple versions of each line in separate columns. Each line is on a sliding piece of UI, so you can scroll and choose one version of each line to see how they look together. And then swap out whichever lines you don't think fit in.

Something that provides an easy way to compare and swap out different phrases.

In a way, it would let you easily test each element of your copy on yourself.

This is a basic prototype to see if people find it useful. The design/UI/UX is simple. I'll develop this again from scratch later on.