NEW YORK TheStreet As the Apple ( AAPL) App Store approaches 50 billion downloads, it's a good time to pay homage to one of the most popular app trends. Messengers are all the rage these days. Cell phone providers beware, free calls and texts are easier than ever. With all the choices in the App Store, the hardest part is determining which platforms are the best. Facebook ( FB) recently took note of the trend. Its messaging app is more popular than its regular app. Messaging is also integral to the newly launched, Facebook Home. Even with the popular Facebook Messenger being available, there are still plenty of options for staying in touch with your friends. Sometimes social media just isn't enough. TheStreet took a look through the app store and created a list of the best messaging apps. Goodbye, smartphone bill.