Hi Claire,

We have a mobile version of Workbooks available in Beta right now.  It's not fully completed but it works and you can see the functionality available.

You can access the beta here: https://secure.workbooks.com/mobile/.

You can also see more details about what's included in the initial version the mobile client on our roadmap page here: http://www.workbooks.com/help/roadmap.

We hope that helps.

The Workbooks Team