Cool Hack That Turns Your Smartphone Into Your Own Black Light

Ever wanted to check how sperm-y things are before you touch them? (ie, hotel beds, hotel bathrooms, other people’s phones/laptops)

No? Fancied checking for ‘super secret’ spy writing? Well, now’s your chance.  Some clever chap figured out how to easily make your phone into a black light.

Check  it out:

 

   

  

What do you think? Tell us in the comments

Source :hellou