Systems and methods for estimating personal replenishment cycles

A system comprising:

• one or more processors;
• and
• one or more non-transitory computer-readable media storing computing instructions that, when executed on the one or more processors, cause the one or more processors to perform operations comprising:
• coordinating displaying a personalized list of recommended items on a graphical user interface of a user device of a user, wherein the coordinating displaying occurs after:
• determining a personal replenishment cycle for an item of a set of items previously purchased by the user by executing a first set of rules on historical sales data available to a retailer;
• increasing available storage space in the one or more non-transitory computer-readable media of the system by removing a first item from the set of items based on executing a second set of rules to identify that the user has stopped purchasing the first item;
• and
• increasing a network bandwidth of the system by reducing a number of database requests for the set of items previously purchased by the user based on executing a third set of rules on the personal replenishment cycle for the item, wherein the third set of rules comprises:
• identifying an elapsed time since the user bought the item from the retailer;
• estimating a number of times the user has replenished the item;
• estimating a number of times the user has replenished remaining items of the set of items;
• and
• determining a score for each remaining (user, item) pair comprising a respective user, item information.