We’ve all suffered from lost phone syndrome at one point or another, haven’t we? Back of the sofa cushions, yesterday’s coat pocket, a bag at the end of the rainbow. It’s just one of those frustrating things that can happen, especially when we’re on our way out of the door to catch a train/plane/bus. But now there’s an app which can help you find your phone in an instant without having to make a call, and it’s totally free.

Whistle Phone Finder, as the name suggests, is a free Android app which helps you locate your missing handset with just a whistle. That’s right, once you’ve set it up, all you need to do is whistle in each room and if the phone is there, it will trigger an audio and/or flashing light response. And it actually works!

We tested it out with a number of sensitivity settings (you can select from low to high) and under cushions and it worked fine. You can choose from a variety of audio responses, or even pick your favorite music track, and once you give a whistle, the alarm will trigger to help you locate the hidden phone. Clever.

It works even on silent mode, which is great, and you can also move the app from the phone to microSD card to save storage space. Oh and it apparently runs in the background to conserve battery power. We like it. The only thing is you have to put up with a fair amount of advertising, which is just a tiny bit intrusive, but hey, it’s a free app right? Grab it, and save your brain from some lost phone pain.