Systems, methods and computer program products for identifying recurring purchases of the same good or service based upon item-level electronic transaction data. Item-level electronic transaction data is analyzed to determine a purchase interval of a good or service. A consumer is reminded to purchase the good or service based on the determined purchase interval by receiving an electronic message at a consumer computer or mobile communication device, e.g., in the form of an electronic shopping list. Purchase intervals of different items may be determined such that a list generated at one time may include certain goods and services but a list generated at another time may include other goods and services due to the variable time between purchasing different goods and services.