There have been rumors about the app being connected to sex trafficking, but the makers assure they are not true.
Internet horror stories passed around on forums and other sites to disturb and frighten readers.
Includes stories from Slender Man, a fictional character that inspired two 12-year-old Wisconsin girls to stab and nearly kill a friend.
The fear is that they are opening themselves up to all situations of abuse. If users neglect to turn off the location sharing feature, viewers can locate the Periscope user.
The app appears to be a simple calculator, but by punching in a code will unlock a private photo album.
it has been criticized for not delivering what it promises for adults 18 and older.