I shilled this yesterday as well, but anybox (https://anybox.cc) might be for you, that's what I am using currently. It's native on iOS/Mac, syncs with iCloud and is very keyboard centric with Command Palette, Quick Open, etc.
No connected cloud SaaS subscription service (though there is an iAP with one-time purchase option) or other bells&whistles, just a good simple native app that does what I want it to do