Last Updated: October 05, 2019
Keywords: auto, catalog, drag, drop
No.
The only time you need to be connected to the internet is when using the web to catalog items using Readerware auto-catalog or drag & drop.
Everything else runs offline, you can search your database, update items, print, check items out etc. etc. without internet access.
If you have books located in a location without internet access you can use Readerware to capture the ISBNs and catalog later.