Some misunderstandings here - when the mobile SHA-256 chips arrive, a single phone will do well in excess of 1GH/s. They will be effectively little 14nm (or less) ASICs in their own right.

iOS cannot be used. (At least, not yet.) The mobile app is based on the Android version of BOINC - which is already coded and in use. With almost 2m Android devices being activated daily, the potential hashing power is way beyond terascale.

This is not "just a mobile mining app", far from it. It's an existing - and successful - global grid computing platform which is about to expand to mobile devices - and which will be harnessing mobile SHA-256 chips as soon as they arrive, creating a significant mining operation.

http://www.bbc.co.uk/news/technology-17995888

Cheers,
Mark