Does the mosquito repellent app work? Watch and find out

A test of an anti-mosquito app that says it helps keep the pesky insects away didn’t work at all for NBC Reporter Kerry Sanders.

The free cell phone app from Pico Brothers, emits high frequency sounds.

The makers say mosquitoes don’t like the sound and will stay away if the app is activated.

Sanders did just that, then stuck his arm inside a box with 5,000 mosquitoes on live television.

Here’s what happened.