With the release of Dynamics NAV 2015, Microsoft also published the Dynamics NAV ERP Apps for Ipads, Android tablets and Windows 8. They are available for download on iTunes, Google Play and Windows Stores.
The Dynamics NAV ERP App is basically the same as the Web Client, but made available for different platforms. The app is aimed mainly for small business users. It is a free app, but requires Dynamics NAV to run.
Read more about the new features of Microsoft Dynamics NAV 2015 here.