Guiding purchasing via smartphone by, determining, via smartphone input of a user, the smartphone user's intent to purchase a given product. At least one sequence of tasks to purchase each of a plurality of products is determined. The determined intent to purchase the given product is associated with a determined sequence of tasks to purchase one of the products in the plurality of products. The smartphone user's current state in the associated sequence of tasks is determined. The smartphone user is notified, via the smartphone, of the next uncompleted task from the associated sequence of tasks based on the smartphone user's current state in the associated sequence of tasks.
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