What can an iphone do that an ipod can't?

I know that iPHONES are more expensive then iPODS. I know that with phones you can call and text, but you can get apps for that on an ipod. So what's the difference?

The only difference is looks. Talk/text apps, updates, and internet browser are all the same.

An iPod can only text and call when connected to Wi-Fi. Call apps give poor voice quality. GPS can't provide a good location even with Wi-Fi, only the location of the IP address. In my case, that isn't even in the same state and hundreds of miles away.

The latest iPhone version supports all the applications that the iPod supports. Starting from iPhone 2nd Generation they all compatible with iOS6 operating system but there's a lack of compatibility with all the iPod versions. Only Ipod 4th and 5th generation supports iOS6. With an iPod you can only make video calls but in case of iPhone it supports video calls, voice calls and text support. Iphone is far better then iPod in case of Camera's. Iphone supports Siri, 3D and GPS Applications but Ipod doesn't have 3D maps, Siri is not available in iPod 4th generation because it doesn't have the requisite computational and audio precessing power to run Siri.