Android (rooted): Several apps let you tap the status bar at the top of the screen to jump to the top of a feed or page, and a few let you tap somewhere to go to the bottom of a screen. But how do you get both functionalities across all your apps? OneClick Scroll lets you jump from top to bottom just by tapping the status bar.
OneClick Scroll is a simple utility that gives you the power to jump from the top of an article to the bottom or from the bottom back up to the top. For example, you could jump to the bottom to see the comments on an article you're reading. Tap the top-left corner of your screen to jump to the top of an article, or the top-right to jump to the bottom.
It works across all apps, everywhere in Android, which is why it requires root to use. There are a few settings to tweak -- for example, you can turn the vibration feedback on and off, and you can tell the app to load every time you turn your phone on. It's free and available now at Google Play.