FBI OPEN UP Button is an Android application developed by Sweet Tangerine and categorized under Lifestyle. It is a free app that allows users to play the iconic phrase "FBI OPEN UP!" with just a tap of a button. The app is designed to be a fun way to scare off any criminal or wrongdoer, with the hope that it will deter them from continuing their illegal activity.

The app is easy to use, with a simple and straightforward interface. Upon opening the app, users are presented with a large button that says "FBI OPEN UP!" in bold letters. When pressed, the app plays a loud and attention-grabbing soundbite of the phrase, complete with sound effects. The app also features a volume control slider, allowing users to adjust the volume of the soundbite to their liking.

Overall, FBI OPEN UP Button is a fun and entertaining app that can be used to scare off any potential wrongdoer. However, it is important to note that the app should not be used to intimidate or harass others in any way.