I have enabled web services in a test moodle 2.2 installation, but get the following error when trying to point the iPhone app at it:
ERROR. Couldn't connect: the site must be Moodle 2.1 or later
It's saying v2.2.2 in the Server > Environment page, and all the checks on that page pass OK. I checked the Mobile web service is working in the Authentication methods page. What else am I missing? I checked the Enable tickbox on our live moodle (v2.1) and that works fine. But I'm aware you need minimum 2.2 to see resources on a course page, as less than that functionality doesn't seem really useful to me.