What's a good Android app for freezing your Amex card the second you realize you've misplaced it?

Okay, so I'm all about security, especially with credit cards. The Amex app has this feature where you can literally freeze your card with a tap. Like, if you're anything like me and constantly misplacing your wallet, this is a lifesaver. No more panicking and calling customer service. You just lock it down in the app, and boom, no unauthorized charges. And from a technical standpoint, the UI for this is slick – it's not buried in some obscure menu. The dev team really thought about the user experience here. It loads almost instantly, too; I'm talking under a second on my Pixel. Plus, it gives you peace of mind knowing that even if your card does fall into the wrong hands, they can't use it until you unlock it. I've used it a couple of times (don't judge), and it's been smooth sailing every time. No spaghetti code situations here, just clean, functional design.