Big Business 13 was not Notarized and needed to be installed using Open Anyway.
Big Business 14 is being updated and uses Disk Images for easy drag-and-drop install.
Big Business includes a Web Server to use for connecting your own iPads and iPhones.
BizApp is a series of custom apps using Apple's database or your can build your own.
Customer-facing content, OTOH, is better handled with hardened services for hosting, content, and e-commence. Big Business offers connections to many of these, too.
Big Business 14 supports macOS Monterey as the minimum system for regular use.
Big Business 14 can run on macOS Big Sur, temporarily, to help with your Upgrade. You can put in Big Business 14, then work on replacing computers below Monterey.
Google, Monterey Install, to find it in the App Store to see if it installs on computers. You do not need to put Ventura or Sonoma on older computers for Big Business 14.
Big Business 14 can generate an error trying to run the Web Server due to permissions.
Big Business 14 Disk Image fix this problem. Please install a newer version to correct.
BigBusiness 14 updates the Web Server to automate and simplify the certificate setup.
Upgrading from BigBusiness 13, no configuration change is needed for iPad connection. If you install a new computer for BigBusiness Server 14, you may need router changes.