These days I think OMEMO is a better choice than OTR, if your client supports it.

What makes you think that Christians, as a whole, deny science?

I don’t know what your exact criteria for “sportswatch” is, but I’ve been very happy with my Bangle.js 2: https://banglejs.com/

Another application of Parse, don’t validate. The vulnerability isn’t really about the single-line regex, it’s that the validation doesn’t match the use. If the regex extracted (read: parsed) the valid bit with a group, then passed that through, it would be fine.