The latest version of Banktivity (9) can be downloaded using the following link:
Banktivity 9 (for use with macOS 10.15 (Catalina)- macOS15 (Sequoia)

The following links can be used to download older versions of Banktivity/iBank for Mac*:

Banktivity 8 (for use with macOS 10.15, mac OS 11, macOS 12 & macOS 13)
Banktivity 7 (for use with macOS 10.13-10.15)
Banktivity 6 (for use with macOS 10.12-10.14)
Banktivity 5 (for use with macOS 10.9-10.12)
iBank 5 (for use with OS X 10.8)
iBank 4 (for use with OS X 10.6-10.8)

You can also use the following links to download Banktivity/iBank Manuals:
Banktivity 9 Help Files
Banktivity 7 Manual
Banktivity 6 Manual
Banktivity 5 Manual
iBank 4 Manual

*NOTE: Older versions of Banktivity can no longer be purchased, and we are no longer providing technical support for them.  The only version of Banktivity currently available for sale is Banktivity 9.