Devices, systems, and methods are disclosed for tracking financial transactions at their source, generating transaction records, categorizing and storing the records, and providing services related to the records. Transactions performed between a mobile device and a point-of-sale may automatically generate transaction records including electronic receipts that may be categorized and stored on a database. More traditional transactions such as those involving cash, paper receipts, etc. may be captured via a scanner on the mobile device for inclusion within a transaction record and subsequent categorization and storage. Notifications such as alerts, offers, and recommendations may be provided in real-time or close-in-time to the transaction being performed, thereby enabling services such as budgeting, inventory management, rewards, offers, etc.