There is nothing perfect. The same applies to operating systems and applications. Often, you can see a situation where the newly downloaded application refuses to run at all, or no longer work correctly after running almost immediately. Faced with this problem, many immediately move to the App Store and left there angry comment.
However, before you blame the developers in all serious, it is necessary to make only one simple thing: to restart your i-device. Just turn it off and on again. There is a chance that, after this manipulation application that completely refused to work or terribly tupilo, starts behaving quite correctly. The same applies to the overall speed of the operating system.
Of course, the Council does not claim to something recently opened and unique, but! Seven troubles - one rezet. This rule works for many systems, including iOS. There is an option to reboot while holding down the Home and Power buttons, however, Apple recommend using this method only in cases where the smartphone does not react to your actions.