So... I know that a couple of months ago I complained about the reputation points not stacking... and that's getting fixed...
But now they're not showing up at all. All I'm seeing under "Achievements" in the iOS app is badges awarded.
Now, to compare, here's my achievements pane on FF:
I did check... I haven't installed a new version of the iOS app... though I do know that some updates can be pushed without a new version.
The same thing is occurring on my iPad and iPhone.