What is the regular program/filetype which you use/prefer?
Pdf?

Is there an option like that? Or is it something to be available in the developer options or so?

Fair. I hadn’t considered an existing digital library as a vendor lock in.

No love for Microsoft here. Just musing over the question.

The XBox is still a popular console and has fans. A quick search tells me they are holding their share of the market. So maybe that?