If the problem is with a previous version not installing or updating cleanly, it might be worth uninstalling the eBay app, restarting your device, and then installing the latest version of the eBay app once again.
Make sure that you have the latest update on your device too. IS your device old? Ebay will no longer work on my oldest Apple Ipad. It's impossible to download the app . It actually tells me that the device is too old and cannot support the ebay app. Once this happened, I had to get another ipad.
