The Onion Browser allows for privacy when surfing the Web with your iPhone, iPad, or iPod Touch. It is an iOS app that is loosely similar to the popular Tor browser that is available for Windows, Macintosh, and Linux. The app has always been popular but recently exploded to thousands of downloads recorded every day. The results of the recent US presidential election might have had something to do with this decision.
Now the web browser is available to everyone free of charge.
You can read more in an article by J.M. Porup in the arsTechnica web site at: https://goo.gl/NYsW4B.
NOTE: Orbot is a similar FREE Tor web browser and Torrent network app for Android devices. It is available from the Google Play Store and other places as well. Information may be found at: https://www.torproject.org/docs/android.html.en.