Event it is assumed that the SharePoint Applications model is common for SharePoint Online and SharePoint OnPremises, this is not true 100% as discussed in this post. One of the differences we can find today is that when we remove a SharePoint App from Onedrive for Business or from a site group, the App is going to be sent to the recycle bin … however, that’s not the same case in a SharePoint 2013 SP1 farm. Let’s see how the Recycle Bin for SharePoint Online Apps works:
Navigate to your OneDrive for Business site and then go to the Contents page of the Site. Click on the options available in the context menu of the App to proceed to remove it.
Once we click on the option to delete the App, it’s shown the corresponding informational message stating that the application will be sent to the recycle bin from where you can restore it.
If we go into the trash, we see that the application actually is there and we can restore it back into the site as a document or site contained therein is restored.