If you're the type who always misplaces his phone, you would be happy to know that finding your phone has never been easier. With the Find Your Phone: Whistle app, you can locate your mobile device quickly through a simple whistle. It may sound impossible, at first, but this application uses sophisticated technology that recognizes sound. It supports a variety of beeps, and as soon as it detects the sound, the phone will vibrate to varying degrees and flash.

So, if you can't easily remember where you put your mobile device, this app will help you save a great deal of time. You won't have to rummage on every corner just to search for your phone. Kindly note that the app is for indoor use only.

Furthermore, this app is free to download and use.