This is a browser to protect your privacy. Its icon and name are like those of a calculator. And It starts as a calculator at first. (Off cause, it does work as a real one.)
When PIN is input to a calculator, Browser Mode starts. It’s a custom browser inside this App, Not Safari. Your history and a bookmark can't be accessed from other apps. When you turned off screen or return to a home screen, the Browser Mode finish automatically.
This app will help you. But, there is one problem you have to care.
iOS keyboard have a learning function, so you have to change a setting about keyboard by yourself.
Fixing the bug that a fullscreen movie can't stop when you remove from this app.