Interesting! I guess "snap" is quite a desirable verb for a screenshot tool name, haha.

I couldn't get snapper.com, so I replace "s" with "x" instead.

One thing I didn't know is that people tend to read it like "ex-snapper" or "znapper", which is unexpected to me (English is not my first language)

Yes definitely, over the years I've seen a few names with 'snap' as a base. It makes sense. I also tried to get snapper.com some times (although in my niche audience a website is not required at all). For the name, I think read it as ex-napper.