This thread is dedicated to the discussion, thoughts, and opinions of certain mobile games you've played. I'll personally post my own opinions on games I've played, along with a source link and download if it catches your attention.
Fantasica - A tower-defense card-collecting RPG with a plethora of different event types every 2-3 days. Probably one of the definite free-to-play, pay to win games out there. Beautiful and usually lewd art, but by god, you will definitely have to spend to get somewhere in this game. I played for two years, got around $500 worth of items in-game, and sold it back a few weeks ago, quitting for good. People will spend $300-$500 per event just to get 8*s and above - they recently released 9* rarity cards and I can only imagine they'll keep increasing the rarity. I don't really recommend it (really, I don't), but a worthwhile mention because I somehow played it for years.
Age of Ishtaria - An action-battle card-collecting RPG by the same people who created Fantasica; as such, you'll get a multitude of different events, not limited to a single gameplay. Personally, I'm playing this now and it's not as grindy/spendy as Fantasica, but if you didn't get a head start from the beginning, it'll be a while before you catch up to everyone. Features art by a few people who did Fantasica, meaning it's pretty, cute, and lewd on occasion. If you're not the spender/grinder/time-waster type, this probably isn't the game for you.
Soccer Spirits - A psuedo-sports action RPG that has literally nothing to do with soccer except with the field and the artwork. Don't let that fool you though - this is one of the most generous type of game I've played so far. Just playing through the game itself gives you crystals needed for Gachapon pulls to build your team. The gameplay itself is pretty addictive and fun, and requires strategy and skill during soccer "games". If you're more of the mindless type, there's also an "auto" button for battles. Oh, and the artwork is nice, too.Recommended for people trying out mobile games for the first time.
Puzzle and Dragons - A puzzle RPG that defined what many mobile RPG puzzle types are. If you've browsed the app store, you've probably seen one of the many countless mirrors/spin-offs of this game, for good reason - it's one of the most popularly played mobile games in Japan. The game is simple, move blocks around, match 3 or more, and inflict damage on the monsters - but mid and end game requires some much needed skill and concentration for the veteran player. Easy to learn, but extremely difficult to master. In addition, the game is famous for doing crossovers with other popular franchises, including Batman and Robin, Superman, Monster Hunter, Dragonball Z, Saint Seiya, Ragnarok, Hello Kitty, Evangelion, Hunter x Hunter, Angry Birds, Space Invaders, Dragon's Dogma, Dragon Quest IX, God Eater, New Super Mario Bros., Hatsune Miku, Final Fantasy, and more (yes, and more.) Recommended for puzzle lovers.
I'll post more games I've played later on.