What's a good Android app for buying and selling crypto when you're hopping between countries and don't want to get stung with fees?

Honestly, Kraken's been an absolute godsend on my travels. I needed something reliable for buying and selling crypto, especially when I'm bouncing between countries like Thailand and Japan. It's proper useful because it doesn't eat up your roaming data too much, and the interface is dead simple, even when you're jet-lagged. Plus, the security is top-notch, which puts my mind at ease when I'm using public Wi-Fi in some dodgy hostel. I've even used it offline a few times just to check prices after downloading the data, which is brilliant. It's sorted me out more than once when I've needed to quickly convert some crypto to local currency. Definitely recommend it!