A Turkish inventor has created an iPhone secrecy screen that makes all of your content invisible to prying eyes. The display glows white while the iPhone is in use, and you need a special pair of glasses to see what’s really going on.

Everywhere you look, people are using their smartphones. They’re playing games, chatting to friends, browsing the web, and getting things done. And everyone around them can see exactly what they’re doing if they choose to.

Inventor Celal Goger wants to solve that problem. He has invented an iPhone secrecy screen that can only be viewed with a special pair of glasses, so to everyone else around you, it just looks completely white.

But not every pair of glasses is the same, so you can’t just buy a pair of your own and spy on other peoples’ secrecy screens. Each one is equipped with a chip that allows it to communicate with the iPhone and receive the picture.

It took Goger six months to develop his first display, but the second one took just four months. His third was built in two months, and he is now able to churn them out in just ten days. He is now looking to secure a copyright to sell them.

Goger is now working on a nanochip that can be fitted to any pair of glasses to make them compatible with his display. He also wants to make it possible to activate and deactivate the invisibility function with a single button.