Hair Trimmer razor sound prank is a free iPhone app developed by Romman Smart Applications LLC. It falls under the Lifestyle category and offers a realistic shaver simulation that allows you to prank your friends.

With Hair Trimmer, all you need to do is tap on your phone and it will vibrate and play a sound that mimics a real electric razor. The sounds and vibrations are so authentic that it feels like you're getting a haircut. Use it cleverly to scare your friends or prank anyone by making them believe that your mobile device is a hair clipper machine.

It's important to note that this app does not actually help you cut someone's hair. It is purely for entertainment purposes and serves as a simulation and prank application for your phone.