I've gotten sucked into Cooking Fever, one of those apps where you cook food and serve it to customers. Your goal is to make a lot of money, so you can unlock new types of food. If you make enough money, you can buy a new restaurant and start the whole cycle over again.
Each restaurant has about...30-40 different upgrades you can buy. I've got four different restaurants opened now, although only one of them is almost done.
I'm at the point where I more or less cruise through the game, without playing it. See, the daily bonus gives out 900 coins and 2 gems (the premium currency). And most/all of the upgrades I need require gems. So right now, I have to log on each day, get my two gems, then quit. Keep that going for a week or so, and I'll have enough gems to start buying stuff.
Each restaurant has a daily payout, too. I think they give you more, depending on how many upgrades you've gotten. So I get 1,554 from daily payouts, in addition to the 900.
I like the game! It's just that now it's a better use of my time to not play it, so I can get all the upgrades. I'm sure I'll eventually hit the wall where every available upgrade is, like, 15 gems, so it's not as worthwhile to play for a week, for one minor upgrade.