Higher ppi on mobile is still useful if it enables “manual zoom” (i.e. move your head closer). I do this with Google Sheets on mobile all the time, as I like to

Higher ppi on mobile is still useful if it enables “manual zoom” (i.e. move your head closer). I do this with Google Sheets on mobile all the time, as I like to have a lot of the sheet displayed at once to see the overall structure, and then peer closer to read the text.