What's a good iOS game to play in short bursts when I'm waiting for clients to show up?

Look, I don't have a ton of time to waste on games, but sometimes you're stuck waiting – traffic, late clients, you name it. Drill & Collect is perfect for those situations. It's an idle mining game, so the core loop is simple: you upgrade your drill, dig deeper, and collect resources. The beauty is, it keeps running even when you're not actively playing. I usually check in a few times a day to upgrade stuff. It's not going to win any awards for graphics, but it's surprisingly addictive and doesn't require a huge time commitment. Plus, seeing those numbers go up is strangely satisfying. Bottom line, it's a decent way to kill time without feeling like you're wasting it completely. Beats staring at the wall, that's for sure.