Get with the trend: R&F reviews the most popular apps worldwide

Whatsapp?: Worldwide, mobile instant messaging apps grow increasingly popular each day, causing phone carriers to lose money as people make the switch from texting to instant messaging. According to Bloomberg Business, instant messaging cost phone carriers $32.5 billion in texting fees in 2013, based on research from Ovum Ltd. By 2016, the loss is predicted to reach $54 billion.

Trivia Crack: This trivia app is one of the most popular apps, ranking third in the Google Play store and fifth overall on iOS. A wheel chooses a category to answer questions in, and players have the opportunity to play with friends or compete with people all over the world. There are six question categories: entertainment, art, history, science, geography and sports.

aa: Ranking  twelfth overall in the Google Play Store and eighteenth overall on iOS, the app has over a million downloads. A wheel spins in the center of the screen and players have to try to add new dots to the wheel without striking the old ones. The wheel’s speed increases as the game progresses.

Crossy Road: Created by indie company Hipster Whale, this game shares characteristics with other games in which one must swipe to avoid various obstacles, including once-popular apps Temple Run and Subway Surfers. The name of the app is a play off the old joke “Why did the chicken cross the road?” Players can be a variety of animal mascots, and a lottery coin system lets them obtain new mascots.