Abstract: A personal lung function monitoring device capable of exhaled breath analysis is described. The personal lung function monitoring device includes a physical measuring device and a microcontroller. This physical measuring device further includes a flow chamber configured to receive a flow of exhaled breath from a patient/user, and a set of sensors integrated with the flow chamber. The set of sensors can be used to measure a set of properties of the exhaled breath, which can include one or more common lung function parameters and/or one or more biomarkers of the exhaled breath. The microcontroller is coupled to the physical measuring device and configured to receive analog sensor signals from the set of sensors and transmit the digitized sensor signals to a mobile device. In one embodiment, the personal lung function monitoring device combines peak expiratory flow, spirometry, and exhaled breath biomarker measurements into a single device.