How to close running apps without using the home button?

I hate the home button,. And my iphone 5 is not jail broken

Ok, There are two ways to replace the home button
First, it's need to jailbreak. You can download some software by Cydia.
Second, it's no need to jailbreak. The funtion is bring your own iphone. You can open the Settings-General-Auxiliary Yeah the funtion is the same sa the home button. And there are more funtions like volume, Silent Mode and so on.

_I would like to TravleChina.HK

Get an app to do it