To clear all traces of your online activities on your iPhone, follow the below procedure:
- From the idle screen go to Settings > Safari
- Down in the left column (General Settings) you'll have these options:
- Clear History,
- Clear Cookies
- Clear Cache.
- Select "Clear History" button and confirm.
If your are using Google Chrome, you must first open the application, then click the icon to the right of the search bar > History.
Scroll to the bottom of the page and choose between
- Clear browsing data,
- Clear Browsing history, cookies..
- Erase everything.