Can you use a proxy on an iphone?

Ok I'm wondering if it's possible to change your location on your phone to show up differently from where you really are located? I have someone constantly harassing me on my blog and I have their phone ip and location from the ip tracker statcounter when ever they come on my blog. The reason I ask is I think it might be someone I know irl but they might be changing their location to hide themselves. Is this even possible?

These apps make it easy to do almost everything! Five free apps I found to mask your ip with either a proxy or VPN

http://www.ipho9.com/5-best-free-proxy-iphone-apps-in-2013/

Yeah! Easiest way is to use a proxy like zerotunnel.com. I use it myself and it shows me as being in the middle of the US: D