The app does one thing and one thing only: convert from one currency to another. But for that I have a Google Calculator command that does the job (see below).
The app has some currencies selected for quick conversion. As for other currencies, users have to add them from the settings menu. For some reason, the developers decided Serbian Dinar should be on the default list but not Canadian Dollar — strange but whatever. Whats a little surprising is that they are charging for an app that can be replaced entirely by using a short Google search. (Try this: google 1 USD in CAD to get US Dollar converted to Canadian. Replace other currency symbols for other currencies.) Why should anyone pay for this? Its beyond me. (I got the app for free when it was on sale.)
SAMer about Banca currency converter, v2.1