There are 7 iPhone 4S apps that every owner should download. And the best part is that the majority of these apps are free.

·        Shazam: The fourth-most downloaded app of all time, Shazam ensures you'll never let a song you love - but don't recognize - pass you by.

·        Twitter: Instantly share your thoughts in 140 characters or less, see what your friends are saying, and join the conversation.

·        Dropbox: This free service lets you share photos, documents and video anywhere - and any file you save to your account saves to all your computers.

·        Angry Birds: The ubiquitous game is the one to beat for popularity and sheer time-wasting potential.

·        Facebook: Share more than quick thoughts on Facebook, which connects you to pretty much anyone you've ever met at this point.

·        Skype: Call, instant message, or video call your friends and family on Skype without paying a dime. This is great when traveling out of the country.

·         Free WiFi Finder: Instantly find free WiFi hotspots. Find more than 145,000 free access points across the globe. This is great when traveling.