You can still put [no ads] or [PRO] in the icon, pro/paid in the title.
That said, a no-ads app still has ads in Google's eyes if there is any promotional link, i.e. to your website or your other apps. Google takes down those apps if you don't label the links as "advertisement".
That said, a no-ads app still has ads in Google's eyes if there is any promotional link, i.e. to your website or your other apps. Google takes down those apps if you don't label the links as "advertisement".