Mosquito Repellent App

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(CNN) - Just in time for summer, an app that claims to repel mosquitos.  It's called 'mosquito repellent' and claims to produce an ultrasonic sound so high pitched it's undetectable to the human ear, But makes a sound that scares mosquitoes away.

It's been downloaded by millions with high reviews, but does it really work?

Experts are skeptical, Saying mosquitoes don't hear like humans so they can’t see how it repels them.