Do not get me wrong, in my opinion Your app is one of 5 the best apps on ipb market.
1). I checked again even when transactions are disabled app create invoices and clients.
3). This description really helps understand what is going one for users. Thank you!
4). I understand. This system have lot of limitations.
5). Tags system is one of the most useless feature in ipb. In system for $175+ we can't create vocabularies, tags by app and even we can't browse these tags. It's a joke. This simple features are available for example in drupal from 10 years.... Writing tags I mean something like we have on ebay, internal, around app simple tagging/filter system, where we can select price, size, brand, colour etc.