A method for pairing wearable computing device activity data with additional data includes: storing a plurality of activity profiles, wherein each activity profile includes data related to activity of a wearable computing device including at least a device identifier and one or more activity data entries; storing a plurality of transaction data entries, wherein each transaction data entry includes data related to an electronic transaction including at least a primary account number and additional transaction data; receiving pairing data, wherein the pairing data includes at least a specific device identifier and a specific primary account number; identifying a specific activity profile where the included device identifier corresponds to the specific device identifier; identifying one or more transaction data entries where the included primary account number corresponds to the specific primary account number; and updating the identified specific activity profile to include at least the specific primary account number.
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