Dark Sky is the most reliable weather app I have ever used - and I have used (and continue to use) a lot of different weather apps. The app provides users with hyper local forecasts (i.e. "Rain in 5 minutes") and does so with an extremely high degree of accuracy.
Keeping in touch with friends and family is tough, really tough. At least for me it is not too far from exercising - you know you should do it more often, but you just don't. That is why Bond exists - it's the app for keeping and maintaining bonds with those you care about.
Think way back to 2002 when Paypal was cool. Now fast forward a decade and think about how Paypal might look if it was still cool and understood mobile? That's Venmo and it is that cool and they definitely understand mobile.
The perfect app for airport pickups. All you do is select a flight and you'll get a notification when you need to leave for the airport in order to make it perfectly in time and without the need to wait around.
Lift, not to be confused with the similarly named Lyft (the ride sharing app) is a very simple but very powerful habit tracking app backed by a talented team of psychologists and computer scientists out in San Francisco.