Grab your Android device and navigate to the Settingsmenu (either by tapping the physical Menu Button and selecting Settings or by opening your application list and selecting Settings as seen in the first panel of the screenshot above). Navigate to Applications and then to Manage applications.
Select the app you want to stop .be careful some apps like Google settings can affect others apps. then click disable option. Before that don’t forget to clear cache.similarly you can enable it when needed. This can reduce the memory space and you can replace with your favorite apps.