Does anyone have experience with Guideline 22.9

We have a client that would like to calculate medicine doses for healthcare providers. He is a board certified physician but not a hospital or insurance company. How exactly do they define calculate? Any calculator calculates doses, but they allow many different calculators. Is it the fact that the medicines are in the app? I see many examples of apps violating this guideline, but they are older and may be grandfathered applications.