JCOM_V1_N4_RP3 Manikandan Sivashankaran Sathis Kumar Kanagaraj Journal on Computer Science 2347–6141 1 4 16 21 Asthma, Peak Expiratory Flow (PEF), Personal Mobile Devices, Respiratory Diagnostics, Respiratory Rate (RR), Beats Per Minute (bpm), Breaths Per Minute (bpm) Asthma is a disease that affects over 300 million people worldwide and is disproportionately observed in the developing world where air pollution is sometimes more prevalent. This disease can range in severity, causing the airways of the lungs to constrict and inflame, and the therapies can completely and permanently ameliorate the disease's effects on the respiratory system. One effective way to track the asthma symptoms is to monitor a patient's Peak Expiratory Flow (PEF). There are presently many different handheld PEF monitors commercially available, and these suffer from a variety of different limitations. Many current PEF meters are inaccurate, inconvenient to use, bulky, expensive, and rarely include real-time data plotting capabilities. The authors have created a user- friendly, accurate, and moderately inexpensive external mobile device accessory that records and stores the user's PEF, and graphs this data over time. They also have created a custom software interface to send this stored data electronically. December 2013 - February 2014 Copyright © 2014 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2714