Private Browser - which pretends to be a calculator to protect your bookmark and browsing history

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 cant 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.