App usage grew 52 percent in 2013, but most people stuck with what they knew and didn't download many new apps.http://feeds.feedburner.com/~ff/ziff...?d=yIl2AUoC8zA http://feeds.feedburner.com/~ff/ziff...?d=I9og5sOYxJI http://feeds.feedburner.com/~ff/ziff...w0:-BTjWOF_DHI http://feeds.feedburner.com/~ff/ziff...w0:V_sGLiPBpWU
http://feeds.feedburner.com/~r/ziffd...~4/JcyvN5F64GE
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