Yo, what's a good iOS game that'll actually make me think without melting my phone when I'm tryna chill between streams?

Okay, so Braindom is this puzzle game I found, and it's actually pretty poggers. I'm always looking for something to keep my brain sharp between streams, you know? Gotta stay on top of my game, gotta make sure I'm ready to clutch up in Valorant. This game doesn't make my phone wanna commit toaster bath, which is HUGE 'cause I can't be dealing with lag when I'm trying to schedule my tweets or check Discord. The puzzles are actually kinda clever, too. Like, some of them are real head-scratchers, but not in a frustrating way. More like a 'big brain move by the devs' kinda way. Plus, it's got a ton of levels, so it's not like you're gonna run out of stuff to do after five minutes. Keeps me occupied during those awkward stream downtimes, like when the internet decides to take a nap. Honestly, for a free game, it's absolutely cracked. It's not gonna replace my main games, but it's perfect for a quick mental workout.