What's a good iOS app for practicing coding interview questions? I'm too tired to learn complicated apps, but this nurse needs to level up!

Okay, so LeetCode is actually pretty great for practicing coding interview questions. I know, I know, coding and nursing seem totally different, but some hospitals are using coding challenges for IT positions, and I'm trying to move up! It's got a ton of questions, and the interface is simple enough that even when I'm totally brain-fried after a long shift, I can still manage to get some practice in. It's like having a pocket reference guide, but for algorithms. Plus, it hasn't crashed once in the six months I've been using it, which is saying something because my phone is basically always on. I mostly use it to practice during my lunch breaks or when I'm waiting for lab results – gotta make the most of those precious few minutes!