Control and fix display brightness
I use a samsung galaxy tablet, and I'm left handed. This mean's writing in landscape mode means either my hand sits on the home button (WAY too annoying) or it sits over the brightness sensor.
When my hand covers the sensor, the brightness of the page changes, which is really annoying. THat menas I have to go into my own settings and lock the auto brightness.
It'd be nice to be able to have the app fix the brightness while in use so lefties don't have to toggle this in the settings.