How to exactly find where memory is leaking in project of iPhone?

Even with ARC memory leaks can occur, it just inserts release and autorelease during compile time.

Yes, even with ARC there are memory leaks. ARC is not a garbage collector, it only inserts for you, at compile time, retains, releases and autoreleases in key positions. So although it does help the developer, you should be aware that memory leaks still exist (for instance circular referencing).

You can start by using the Static Analyzer and correct any problem it shows you. You can then go to Instruments and choose Leaks.

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