Hide Private Photos and Video-s
This app is described as a Free Photo Manager, and allows users to keep private photos and videos hidden. It is disguised as a calculator app, and also allows users to set up a decoy account so that if the true identity of the app is discovered they can enter a decoy password to open up a "safe" set of hidden images.
Why is it a risk?
This type of app is known as a hidden vault app. Whilst the app itself is not inherently dangerous, the manner in which some individuals use them can put that individual at risk. These apps are commonly used to store inappropriate images and pornographic content, which can cause serious issues if that content belongs to a minor. There has been a recent outcry about these apps and the manner in which deception is designed into the app itself (standing as a calculator rather than displaying as a vault). Apple has made a move to ban these apps out of fear that children are using them to store inappropriate images and prevent a parent being able to intervene.