How to change the density (DPI) for specific applications? How do I change DPI for applications only (different density for system and separate for each app)? I suppose there exist some specific part of code to change DPI value.
You can use Tasker (paid; 7 day free trial) as well provided that OS is rooted.


Profile: Application &rarr; select app fro DPI scaling
Task: Action: Code &rarr; Run Shell


Command: wm density &lt;DPI&gt;

wm implies Window Manager. Replace &lt;DPI&gt; with the DPI you want.
Check Use Root

Exit task: Action: Code &rarr; Run Shell


Command: wm density reset
Check Use Root



That's it. Launch the app and the density of the whole system will change. Exit or switch the app and DPI would revert back to normal. The fluidity of the switch is not up to the level of App Settings, but it's acceptable.