Here's how you can download the official eBay app free for Android devices.
1. Go to the Google Play page for the Official eBay Android app.
2. Tap the Install button.
Here's a description of Official eBay Android app:
"The power of eBay in the palm of your hand!
A must-have app for eBay Buyers and Sellers that makes it easy to browse, shop, sell and manage your eBay activity whenever and wherever you are!
We’ve streamlined and improved the selling flow so it’s even easier and faster to list your stuff on eBay. If you haven’t listed items with the app before, try it out today!"