Pokemon Go!
Summer 2016: where everything seemed to be okay for once. Granted, kids were trespassing into people's yards and even onto train tracks to catch that Pokemon, but still, they were at least outside! Pokemon Go! used Augmented Reality technology for the player to project a Pokemon onto whatever their camera was pointing at. There were even "tournament" points at certain public parks and restaurants where users could meet up to battle their Pokemon.
Venmo
What was life before Venmo? Probably a lot of horrible math and owed money, honestly. Venmo makes it super easy to send money to your friends and request your friends for money. Some people even use it to send rent to their landlords or send the wonderful gift money to friends and family across the country.