If you are using a lot of apps at the same time (meaning several are running in the background) it’s possible almost all your RAM can be used up, slowing down your iPhone, until you quit those apps. While this RAM is allocated to it, other apps can’t use it. When an app is running a certain amount of RAM is allocated to it.
Easily capture clips, apply one of 10 striking filters, add a song from your library, and then share your creation with friends and family though a variety of social-networking services.