In a previous posting, I said I had problems connecting with more than one Google calendar per Google app.
I assumed that was a misfeature of the syncing capability of the iOS calendar apps. But I was wrong.
The problem was with Google — or, really, with me.
Google provides an interface called iPhone Select. If you want to sync more than just a single calendar with your iOS devices, you have to change a setting there. (By “there” I mean in the iPhone Select interface. You can’t change it in the regular Google Calendar settings page.)