What's a proper useful Android app for making shopping lists that I can actually use when I'm roaming about and don't have data?

Right, so I've been using this Notepad app, and it's actually proper useful. I can make all my shopping lists before I head out, and it works a treat even when I'm in the middle of nowhere with zero signal. Like, I was in rural Thailand last month, and it still sorted me out! I can just tick things off as I go, and it doesn't matter if I'm not connected to the internet. Plus, it's super easy to use, which is always a bonus. It's saved me from buying the same thing twice more times than I can count, especially in those massive Japanese supermarkets. I've downloaded maps for all of Europe, but sometimes you just need a simple list that works offline, ya know? It doesn't eat up your roaming data either, which is a massive win!