I think you're on the money, there isn't a good "A for B" analogy. That said, I like formulas for this sort of thing, whther they yield the final solution or n

I think you're on the money, there isn't a good "A for B" analogy. That said, I like formulas for this sort of thing, whther they yield the final solution or not. Uber's sentence from the article could be an alternative: "You push a button and in five minutes a Mercedes picks you up and takes you where you want to go." "You push a button and you can read 26.4% faster." That still feels a little vague and evasive, I think. "You push a button and your book is re-formatted and coloured so that you can read faster." If you have to have an anology, you could try. "A yad for ebooks." https://en.wikipedia.org/wiki/Yad https://en.wikipedia.org/wiki/Yad