The 1.2.1 version of ConvertIt for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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. The program belongs to Education Tools. The unique identifier for this program's bundle is com.pastieapp.ConvertIt. The following versions: 3.1 and 1.2 are the most frequently downloaded ones by the program users. This software for Mac OS X is a product of Tigsoft. All Rights Reserved.
From the developer:
ConvertIt is the premier unit conversion program for the Mac OS X platform. With 2800 units, including an up-to-date currency section, it features a scientific calculator, tabbed windows, unit highlighting, online definitions and much, much more.
ConvertIt 3 allows for having multiple windows open at once so you can go back and forth between categories or even within the same category without losing the conversions you just did.
You may want to check out more Mac applications, such as Convert It Mac or Convert.IT mini, which might be related to ConvertIt.