Here's how you can download the Bump app free for Android devices.
1. Go to the Google Play page for the free app Bump.
2. Tap the Install button.
Here's a description of Bump:
"Use Bump™ to share contact information, photos, videos, and files by simply bumping two phones together. Just open Bump, hold your phones, and gently bump your hands together -- Bump will magically do all the rest."