I've been attempting to build something similar and every time I take an honest look at the state of affairs on mobile phones I'm end up leaning towards running

I've been attempting to build something similar and every time I take an honest look at the state of affairs on mobile phones I'm end up leaning towards running the way meshtastic users do: either strictly on dedicated hardware, or over a bluetooth link from my phone to dedicated hardware which I'll keep in my backpack or glovebox.