Little disapointed

I was tired of having to wait for my trades so I finally decided to install the app to get rid of this steam guard thingy and surprise you need a phone number. So basically my ipod is useless and so are ipad i guess. Why? Is it not secure enough seriously? Please do something about it :) unless that it is a nice app.

Pmpatate7 about Steam Mobile, v2.0.7