The number of people who depend on image descriptions is higher than I thought! Interesting, and something to think about.
Here are the results for the same poll on Twitter:
@Mycroft @argi Tusky on Android shows alt text below the image when you tap on it, and Twitter has a little "ALT" button in the corner of each image that opens a popup. I assume they also provide that information to screen readers, though I've never actually seen how that looks or sounds like in practice.
@kianga this is quite surprising. I didn't realise people even knew how to view alt text. Do phones even display that?