Download of RepCheck 1.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this Mac application is ACT Productions. RepCheck for Mac is included in Productivity Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
The simplest and quickest way to manage repeated elements in any text.
RepCheck can work in multiple ways with any text witch is composed of list elements, separated by a character (enter, space, tab, or anything else). Elements can be emails, names, numbers, etc.
You may want to check out more software for Mac, such as PDFMergeThing, Apimac Clean Text or Gordon, which might be similar to RepCheck.