This looks great. Regarding the taglines and copy being confusing for some, I understood it, but I have some suggestions:

Instead of saying what it is, say what it does (for the user). For example instead of 'Offline-first API Client'..., try "Document your API, test it, and version it using Git 100% locally and free in a modern GUI. Voiden even includes a terminal so you can execute any command or custom workflow without ever leaving the app. (OSS release coming soon)". Remember, show, dontt tell.