Rungig for Android
Most important for now is the receipt and invoicing tool that allows users to create instant receipts and invoices and have it emailed to their customers or clients. The receipts are sent in PDF format and users can add customer name, address, city, price, amount paid, balance, etc. Its very easy to use and saves you the stress of sitting down in front of a Computer to prepare these documents.
You can resend the receipts/invoices or save them for later. You can also track all your receipts and invoices and get periodic reports on them.