Kazwire, a reliable free proxy, using the Kazwire search is glitchy a lot of times, I recommend using the DuckDuckGo App on Kazwire. 

How to Use: When you launch the Kazwire proxy, you will be transferred to the home page. On the top right corner, you will see 4 things to press, Search, Games, Apps, Settings. You will click on Apps. This will take you to the Apps provided on Kazwire. You will scroll until you see the App, DuckDuckGo. 

Another Cool Feature is that it also blocks "P*rnHub" so people can't go on any "Adult" Websites.