Thanks, Brian — really appreciated the TypingClub app (I’ve been looking for one to round off my 10-finger typing skills for numbers and special characters — especially as I do a lot of coding… and not so much prose ;) ) and the Momentum extension.
I wanted to also suggest Calendar 5 for iOS (iPhone and iPad) which is a much better calendar app than Apple Calendar (close to unusable on the iphone) and AirMail for Mac (best email client, especially if, as a true GTD follower, you aim for “zero inbox”): I think gmail’s Inbox is close to useless; and I also very much resent the fact they “push” their agenda, instead of giving users a productive app.