Princess Connect! Re: Dive

There are daily missions that give you stamina if you log in next day/second half of the day (depends on timezone), but before daily reset.

Daily missions; Dungeon attempt is limited to one time a day; Arena and Princess Arena coins accumulate every hour; character shard limit for stages resets every day; Sanctum Survey stage clears are limited per day; stamina, skip tickets and mana accumulate every few hours at guild house up to certain limit

You need to: Grind EXP potions to level up girls; Grind mana to level up their skills (limited by girl's level); Grind equipment pieces to make equipment and upgrade it with crystals (higher end equipment can consist of other equipment that can also consist of several other equipment that can also consist of other equipment); Grind hearts, heart shards and memory pieces for Unique equipment; Grind mana to make and upgrade things above; Everything is timegated, but you are welcomed to pay to skip

Being a service game means that the game will end only when it will not make enough money.

Limited time gacha banners, limited time events, clan battles, limited time jewel packs.

Stamina limits how many stages you can clear. Battle and Princess Arenas have timout period after each fight. Some in-house furniture has upgrade timers.

You can: pay to restore stamina (limited to 40 times a day, price increases after several refills), pay for skip tickets to instantly clear stages, pay to reset Arena and Princess Arena daily limit, pay to reset Sanctum Survey daily limit, pay to reset character memory piece stage daily limit, pay A LOT to get enough gacha duplicate materials to ignore character memory piece stage limit, pay to skip furniture upgrades, pay to double daily mana and experience potion stage clears (indirect skip).

Monthly subscription that gives you skip tickets and jewels every day.

Gacha.

New characters are usually better than older ones.