AR/Invoicing App for iPad??

I'm looking for a simple app to keep track of amounts owing, etc. If it handles invoicing too, great. I don't need anything too intense though.

Any suggestions?

Not sure if any of these might be what you need but a quick search sent me to this site. Hopefully you can find something of use here.

http://iphone.appstorm​.net …ios-apps-for-freelancers/

Thanks!
Yeah, I think I found that same link. I was hoping for more personal experience though.