Pew Internet reports 1 in 4 teens have a smartphone and 63 percent text every day. In fact, according to the most recent stats reported by Nielsen, teens between the ages of 13 and 17 sent an average of 3,364 mobile texts per month in 2011, the most recent year the company reported this statistic. And with all the texting apps on the market, teens don’t even need a cellphone to text. Check out some of the ways kids are social networking and texting, along with reviews of the apps and age guidelines courtesy of child and family media watchdog commonsensemedia.org.