@fuzenco @DonSqueak @daringfireball @gruber Right. GMail compose will flag more than just spell-check errors. It also checks grammer, duplicate words words (sic), etc., and can catch wrong-word errors. Try it? Like I said, I compose using other apps, but for years I’ve copy-pasted into an empty GMail message body (i.e., no addressee, so I don’t accidentally send it to anyone) in order to see things a simple spell-check would miss.