Try P&D (Puzzles & Dragons), it's kinda one of those match 3 games but with a twist. Fun little game as long as you don't wanna play for hours on end.
Summoner's War is amazing also. It looks like a P2W game at first, but once you start playing you realize that to P2W you'd have to drop a lot into the game (Thousands) and F2P is 100% viable. They have mechanisms in place to make sure you get a decent amount of crystals without buying them, so you can use them for the main purpose (summoning monsters) and still have some to pop a double xp or energy refills from time to time. Energy itself... Don't like the mechanic, but you can play for a decent amount of time before running out... And they send free energy out all the time to your inbox (Where you can let it sit for up to a week before it disappears, so you can use it when you need it
)