Fortunately, Apple breaks it down for us: Services net sales in 2019 was $46.2B, and the cost of those sales was $16.8B (source 2019 10-K). They dont specifica

Fortunately, Apple breaks it down for us: Services net sales in 2019 was $46.2B, and the cost of those sales was $16.8B (source 2019 10-K). They dont specifically break out App store vs other services, but as a whole the services section of their business is very, very profitable, according to their accounting. It remains so even if you throw in the entirety of R&D ($16.2B).