I looked at this Growth Chart SDK program and would like to take it open source to use it to my program, so how much does it cost for the full open source?
I don't think it's possible to fully buy the open source version of the Growth Chart SDK application. On their official website, the product is listed as being available for purchasing. The standard license works with the HealthWatch Pro application only.
You can get additional information through the following link: http://www.biovisualtech.com/healthwatch/sdk/download.htm
To contact the developers, use the following link: firstname.lastname@example.org