MobileRead doesn't have a dedicated Bible software thread, that I know of. Perhaps the mods won't kick me off for making this quick post. And, we had just been discussing the CSB.
I just noticed that WordSearchBible has the CSB for free (go to
https://www.wordsearchbible.com/). I usually scan their emails fairly carefully, and never had noticed them bringing this up before. Of course, they could have just made the markdown . . . .
I don't know how well you can use WSB on mobile devices. I never have tried or researched it. Maybe you can, I just dunno. I'm pretty sure that Logos allows you to, or at least you can read the books that you have in the program in another FaithLife (the parent company, it seems, of Logos now) program, of which there are several.
Unfortunately WSB is a little behind many other Bible software companies in several ways. I use it a lot because their books tend to be much cheaper than Logos, at least, and right now I'm more interested in content than capability.