Kevin PurdyWriter, Greenbot

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Kevin Purdy is a freelance writer and former Lifehacker editor. He is the author of The Complete Android Guide and Google+: The Missing Manual.

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Settle up with your smartphone using these better-than-cash apps

Make “Sorry, no cash” a thing of the past with these easy person-to-person money apps.

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Android's swipe-to-shut myth and how to really close apps

You may think you're closing Android apps by swiping them away, but here's what that actually does and how Android's task switcher works.


Why your smartphone battery hates Twitter and Facebook

Twitter and Facebook are killing your phone battery, but you don't need a dedicated app for that.