June 26, 2013, 4:31 PM — Here's how you can download the Screen Filter app free for Android devices.
1. Go to the Google Play page for the free app Screen Filter.
2. Tap the Install button.
Screen Filter lets you apply a dimmer so your screen won't bother your eyes. You can use preset brightness levels on widgets, set brightness based on time or place, and use a brightness slider. Screen Filter offers more comfortable viewing than Android's brightness controls.