Provided herein are systems and methods for setting a physiological threshold value in a user interface for a user behavior-modification system； monitoring a physiological parameter corresponding to the physiological threshold value； and notifying the user with a notification when the user exceeds the physiological threshold value. A portion of the user behavior-modification system can be resident in a memory of a first network-connected electronic device configured with a physiological sensor. The physiological sensor can be configured to physiologically couple to the user for monitoring a physiological parameter thereof. Monitoring the physiological parameter can include alerting the user when the user exceeds the physiological threshold value. Notifying the user enables the user to modify behavior to bring the physiological parameter below the physiological threshold value. The notification can be provided through a vibrator, a speaker, or a display screen of the first electronic device or a second network-connected electronic device.
