Lonely Planet’s free Guides app for iOS and Android comes with offline maps, location-aware functions, curated sights and handy tips. It also lets you bookmark places. It covers 38 cities, with more to come soon.
Face Swap Live does exactly what it says, exchanging two faces in real time. You can take a photo or video of the resulting anomaly and then save or share it. It’s finicky, especially if you’re wearing glasses, but it’s still a ton of fun, and the results are highly disturbing.