Does anyone know of an invoicing app that allows you to choose the currency of the invoice you are creating? I have clients in the UK, US and various other places in Europe and I need to be able to invoice them in their own currency. However, every single invoicing app I have found on iTunes automatically uses the currency of the country where your phone is registered and there's no way to change it. Is this something that's impossible to do or do these developers just think this feature isn't worth adding? If anyone can point me in the direction of an invoicing app that can do this I would be eternally grateful. If anyone feels like developing one I will be first in line to buy it!