Short answer:

As far as I know, all OpenERP apps (Android and iPhone) are closed source, and propose pretty basic functions.

Longer opinated comment:

If you add to this that most of the app providers are unknown to the Community, I wouldn't bet my business on them.

They completely miss the open-source economics leverage: if these providers collaborated on a Community common client library, possibly with a license allowing for private modules, they would be able to, instead of building basic apps, create wider functionality and a great user experience.

In the end, that's what can make their apps stand out from the others.

Well, you need to search on Google for better results.

http://dovemobi.com/