The app has fancy image recognition that lets you search for things like dogs, food, or a particular mountain range and find relevant photos. You can share albums with others and create fun GIFs too.
Best of all is that Google Photos is free to use for unlimited photo storage. If you want to store higher-res photos from a DSLR, the $2 per month plan gets you 100GB. Plans go all the way up to a whopping 30TB ($300 per month), so there are plenty of options for everyone.
Foursquare is the best app for finding restaurants.
Foursquare has a wealth of community feedback (or "tips") on restaurants around the world (try searching "free WiFi" next time you're trying to find a coffee shop), and its use of push notifications to aid in the discovery of new places is unmatched.
Messenger is a great way to communicate with your friends on Facebook.
You can use Messenger to communicate with anyone directly on Facebook, and you don't even need a Facebook account to use the app.
Messenger can also be used to send money to friends, make video and phone calls over the internet, order an Uber ride, and send stickers and animated GIFs with ease. When Facebook’s virtual assistant “M” becomes available outside of San Francisco, Messenger will be able to do anything from order a pair of shoes to call your cable company for you.