With the latest release of Microsoft Dynamics CRM 2013 mobile has become increasingly important to Microsoft. While the Microsoft Mobile App is certainly an improvement (with many more exciting improvements to come in "Vega" later this year) on what has gone before, there are another of cross platform options out there in the meantime. The video below shows my comparison of what i see as the three main options for organisations looking to implement mobile CRM now.
Hope this helps!
xRM Consultant (UK) Ltd