Instruments has always been the most famous debugging tool and the most famous savior of so many games and apps for iOS and Mac OS X. As long as you are building iOS apps from OS X, you must use Instruments to check your game performance, memory leaks, allocations, system trace, and lots of other features. From the XCode menu, you can choose Instruments from the Open Developer Tool submenu.

Once it is open, you can choose to profile apps from different types of platforms and different types of metrics to profile. It is very easy-to-use and handy tool. Its values are very easy to read.