To download the Ebay app, simply head to the App Store (for iOS devices) or Google Play Store (for Android devices). Search for "Ebay" and click the "Get" or "Install" button. Wait for the app to download and install - it's quick and easy!
Once you've got the app, you can sign in with your existing Ebay account or create a new one. This will give you access to all the features and functionality you need to start shopping. You can browse categories, search for specific items, and even save your favorite sellers for later.