What's a brilliant Android app for proper offline maps when I'm trekking in places like the Himalayas where data's non-existent?

Honestly, Avenza Maps has saved my bacon more times than I can count! It's an absolute must-have for any traveller who ventures off the beaten path. I've used it everywhere, from navigating the backroads of Ireland to finding my way through the souks in Marrakech. The best part is that you can download detailed maps of entire regions before you go, and then use them completely offline. This means no more relying on dodgy Wi-Fi or racking up insane roaming charges – a proper bonus when you're trying to budget for that extra pint of Guinness! I downloaded maps for all of Southeast Asia before my trip last year, and it worked perfectly in rural Thailand. It's a lifesaver, doesn't eat up your roaming data, and means you're not wandering around like a lost sheep. Seriously, get it downloaded before your next adventure!