I used Speed of Sound for a bit on desktop linux and after triggering the global shortcut it pastes the text where you have your cursor. You can use cloud models, local network hosted models or just download whisper/parakeet directly in the app. Worked great for me so far.

If you want to try something else on your phone you can try Outspoke.

Consider papra as a more lightweight alternative for paperless-ngx. I have not used it yet unfortunately.