What's a good Android app that gives you a pretty, calming live wallpaper that isn't too distracting when I'm trying to focus, especially on night shifts?

Okay, so after a crazy shift, the last thing I need is some flashy, distracting wallpaper. I just want something calming. "Sun & Moon Live Wallpapers" is actually pretty good for that. It's got a no-fuss approach; you set it, and it just... works. It's like having a little window to a peaceful sky right on my phone. What I like most is that it's actually reliable; hasn't crashed once in the last six months, which is saying something! I use it on my phone at the hospital, and it's been a nice little stress reliever. Plus, it doesn't seem to hog battery life, which is crucial when I'm running around all day and can't always plug in. I'm too tired to learn complicated apps, but this one's simple enough even for me after a 12-hour shift. I mean, it's not a miracle cure for nurse burnout, but it helps!