The Pebble smartwatch has a decent amount of functionality straight out of the box, however there are more than a handful of apps available by way of the Play Store to expand upon that. We have taken a look at some of these in the past. One app was Canvas for Pebble which allows users to create dynamic watchfaces. Today though, we are looking at an app called Pebble Locker. And as the name implies, this deals with locks. In this case, the lockscreen of your phone.