By Chris Morris

PHILADELPHIA (CBS) – On today’s APP-tastic and outta SITE – Data Usage.

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Running up overage charges on your cell phone bill can quickly get expensive – but sometimes you’re not sure when you’re getting close to the line.

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The Data Usage app tracks when you’re using a 3G or 4G connection – and shows it on a monitoring badge on your phone, meaning you don’t have to open the app to check.

It can also predict when you’ll run over your limit, giving you time to scale back.

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Check out the Data Usage app.