Tracking, but no LMS.

Here's the brief:

1> Storyline courses for small (tiny) business.

2> Have a website, cannot afford ANY more "tech", (LMS included).

3> They want to track consumption of courses.

Any ideas, concepts, ideas etc.?

I'm not a web person, is there a clever way they could get rudimentary tracking, by, for example, some sort of "I completed it..." form that could run immediately/automatically after the last slide?

Ideas appreciated!

Bruce