Isn't it awesome how customizable Android is compared to anything else out there? Many elements of the platform can be tweaked, ranging from under-the-hood performance adjustments to visual and user interface modifications. This post is all about the latter, bringing you 10 apps that will replace the stock lock screen on your Android smartphone. Why would anyone want to do that? Well, keep in mind that not all Android smarthphones are made equal. Many come with a lock screen provided by the manufacturer, and while some custom lock screens work fine, others aren't all that great. But these third-party lock screen replacement are among the best ones available in the Play Store. Chances are that if you aren't happy with the lock screen on your Android smartphone, a better alternative will be listed below. Go check them out and tell us in the comments which lock screen you like the most!