where can I buy the newest ems?

Hello everyone! I want to buy myself an ems program, but the problem
is that I don’t know how to contact the author. If there is an author
at the conference, then respond. Write how you can buy
the program. I would prefer to have documentation and the most up-to-date
version, with caller ID, and it would work well. I look forward to your answer.

Sincerely, Andrey.