Abstract: The present invention includes an apparatus and method for blood pressure trend determination of a subject comprising: a housing; at least one of a photoplethysmographic (PPG) sensor or a magnetic sensor in or on the housing and adapted to be worn by the subject, wherein the PPG/magnetic sensor uses a pulse oximeter to measure changes in skin light absorption; a processor for receiving a signal from the at least one of the PPG sensor or the magnetic sensor measurements, wherein the processor comprises a non-transitory computer readable medium having instruction stored thereon, wherein the instructions, when executed by the processor, cause the processor to: measure a trend analysis results to determine the blood pressure trend over a time period; and an input/output device that at least one of stores, displays, or transmits blood pressure trend of the subject.