I’m making a MacOS App

I would LOVE input as I am in the development process. The app will bring the functionality of a windows only app Groupy2. As a lifelong heavy user, I used groupy2 on my windows devices and recently moved to Mac and missed the app, so I’m bringing to MacOS. Are there any features that anyone would recommend I add that you mushed Groupy2 had? I plan on making the first 500 downloads free for life and will probably be finished in 2-3 months. All suggestions are welcome and appreciated!