I've used mobile word since late 2018. But in the last 6 months or so I've been unable to because every time I open the app, it has inverted the coloration of everything on the page. Complete negative. I'm not sure why. I uninstall and re-install and that fixes it for a short period. Then it messes up again. But I can open those same files on the laptop and it's fine. Very frustrating.