 <p>You need to check for memory allocations with following in your app - </p> <ol> <li><p>Using <code>Instruments</code> check <code>Allocation</code> and <code>Leaks</code></p></li> <li><p>Using Static memory analyser check static memory leaks. To use this either use "cmd+shift+B" or go to "Xcode -> Product -> Analyze"</p></li> </ol> <p>Also you need to ensure proper release of your view controllers.</p>