MU, the developer link on this page redirects to the *iPhone* app store. This is a Mac app (only). It should redirect to the Mac app store link for this app. Users, it is true the app is also available directly on the developer's web site. Otherwise, the two versions are identical except for the method used to update. The direct download is completely free, no in-app purchases at all. The app store version has in app purchases, now before you whine and complain about MAS, consider that the developer earns a bit of revenue for his efforts from the App store, but gets NOTHING from the direct download, plus he shoulders the bandwidth cost on his server. You spend more on a cup of coffee, support independent software developers. Older releases for prior versions of macOS are also available on the dev's site.