It's something that I might have a crack at should the fancy come. I have access to porting tools which could make it a lot easier but having never used it I'll wait for a gap to give it a shot
@Hood - I've also written a native android client. The porting tools were cack handed so I just redid the source.
I'm putting it onto Google Play just as soon as I can get my head around all the shenanigans that are involved with it. I'll put the link up here when I've got it sorted.
Not actually used it in anger yet but I have tried it out on a few jobs I did recently to see how easy it would be and it did well. Will be a real time saver and being able to do it on a job instead of trying to roughly do it in my head will be great