Originally Posted by mpeg2

I'm not sure you really need to actively kill apps that you're not using. Android (the basis of the Kindle Fire OS) has a very good memory management system. These apps that you're "killing" are probably not taking any CPU & minimal memory usage - however, they're sitting in the background, available for much quicker loading. If memory is needed, Android will clear it for you.

On the Android phones, there was a brief period where people were using app killers to clean things up - only to discover that they consumed more memory and battery by doing so. Now the recommendation is to simply let Android take care of it for you.

Rich