What's the best iOS app for getting around China, especially if my Mandarin's a bit rubbish and I'm worried about data costs?

Okay, so navigating China can be a bit of a mare, especially if your Mandarin is, shall we say, 'developing' like mine! I was bricking it about getting lost and racking up a massive phone bill. Then I found 百度地图. Honestly, it's been an absolute game-changer. You can download entire city maps for offline use, which is brilliant when you're trying to avoid those pesky roaming charges. Plus, it's surprisingly accurate, even in the smaller towns. I used it to find this tiny little tea house in Hangzhou, and it worked a treat. The route planning is spot on, and it even tells you which subway exits to use. Trust me, it's a proper useful app to have in your arsenal when you're exploring China. Downloaded the maps before I even left Dublin, and it's saved me a fortune on data!