Beanhunter, which helps you locate independent cafes near where you are, has long been a Lifehacker favourite and was the Editor's Pick for Best Mobile App in our Best Of 2012 awards. The iOS version has been overhauled for iOS 7, and now offers more ways to filter (ahem) through your cafe options.
You can sort by map, name, coffee brand used and brewing methods, or find cafes recommended by your friends. It's a free download, and well worth it if you want avoid chain coffee.
Beanhunter [iTunes App Store]