Methods, apparatus, systems and articles of manufacture to monitor the personal safety of a user of a portable electronic device are disclosed. The safety monitor includes a usage context analyzer to determine a usage context in which the portable electronic device is used based on a history of past usage information. The safety monitor also includes a current usage detector, a threshold alert level monitor, and a safety alert actuator. The current usage detector determines whether the portable electronic device is being used in the usage context at a current time, and, if so, obtains a corresponding threshold alert level that indicates a degree of danger to which a user of the portable electronic device is exposed. The threshold alert level monitor determines whether the threshold alert level has been satisfied, and, if so, the safety alert actuator actuates an output device of the portable electronic device.