I don’t know what his APP is using, but the API is not out yet. If he was using the functions in the NFS project, it isn’t going to be suitable for APPs and is going to be removed/changed shortly. Expect breakages in the near future.
I have been tasked with designing and implementing the API. @Viv has given his list of demands (keep it simple!), and hopefully I will do my best to balance ease-of-use with features for advanced applications. I have the interface and (most of) the design/implementation in my head. Currently I am working on writing up the interface and design for review by the team first, then I hope to post here and the mailing list so I can receive feedback as its being implemented.
If you cannot wait, see my NFS fork. I have a branch where the API and design information is going to be stored in a github markdown file. Its obviously not completed yet, so please no feedback yet.