I’ve to admit that working with Visual Studio is more and more productive that working on iOS, but despite the difficulties my iNAV “free time” project has reached the first step.
Actually my Dynamics NAV iPhone client permits you the access to your sales and purchase data (only readonly mode).
When you launch the iPhone client, you can see this functional menu:
By clicking on Customers (the same for Vendors) you have access to the Customers list from your Dynamics NAV (on te list you can immediately see Customer Name and Customer No.):
You can now scroll and select the Customer you want to check its details (obviously the details card is not complete now):
The same for the other sections. If you click for example on Sales Quotes, you can see the list of your Dynamics NAV Sales Quotes (Number and Customer Name):
When you select the desired Sales Quote to check, you can see its details (not complete now):
The same for example for a Sales Invoice you select:
You can check all your ERP documents on mobility directly from your iPhone 
The next steps are:
- Improve details for every documents
- Application Settings with parameter for accessing Dynamics NAV and more.
- Better UI
and after that I would like to create the possibility to Synch with NAV at startup and then having all the documents offline on your device.
Stay tuned…