Being a professional photographer / business owner of 13 years, I always forgot to track purchases and collect receipts. This easy to use app is a helpful tool I can track on the go and give to my accountant monthly through report generation synced with my Google Drive account. It pulls in invoices through Gmail also making it super easy to not forget anything. You categorize it as business or personal and take a photo of the receipt/invoice of applicable. It also tracks your accounts payable but I only need it for the expense tracking option as we use Quickbooks.
Aaron Hogan about Foreceipt Receipt Tracker App