Using mana (similar to Magic the Gathering): Hearthstone (from Blizzard), PvZ Heroes Not using mana: Yugioh Duel Link, and Yugioh Duel Generation
go for Shadowverse, it crossplay with pc version too it from cygames, mean they usually give apologems
Free stuffs for maintenance and for almost anything that Can annoy players.( It s usually used in gacha games when they Give apology gems to Roll gacha )
there's this (gonna play it but its online so I haven't update from the ingame) https://play.google.com/store/apps/details?id=com.rmg.heroesofmagic.pro and this (dunno about this one but the pic look like yugioh duel link) https://play.google.com/store/apps/details?id=com.playfusion.lightseekers_digital_tcg or this (feels like hearthstone with 30k background) https://play.google.com/store/apps/details?id=com.Everguild.HorusHeresy and I was gonna search nutaku on some card game but they got no free one that have decent gameplay. not paid either. also try otogi spirit agent, not really card game but the picture of animated spirit is nice. it just grinding and the story is nice.
solitaire? you do know that card game is the place rifled with in app purchase (and all kind of annoying type of businesses model) and force the player to p2w since they need to level up their card or get the most awesome card (not really different with IRL card game). so all I know is that they need to be online to annoy their player in the name of PvP, but just business practice to watch their player habit and want.