Crash of cars, a little PvP powerup car derby like Mario kart but no racing..and lot of random cars, easy to unlock a new car too.
More fun online but sometimes i don't notice a switch to offline so...
Free to play, and one can skip the ads by swiping to desktop and opening the icon again. I have most of the cars i wanted in f2p very little p2w if any.
Anima - it's just like d2 on mobile, pretty good but one finds items a bit too easy so far. Think it's offline too, might be some online mode. No ads, unless one wants to for some minor bonus wheel & seems zero p2w.
Shadow of death, some platform ninja game.
both offline and online, good f2p, no ads at all.
Offline levels and online pvp arena, generous f2p model, i noticed no p2w when I played it.
Those are the ones i can think of right now.