With gaining popularity of smart devices and the increased amount of sensors, there arise new possibilies to help the user to monitor his health using a smart device. This research describes the approaches and their performance on exercise monitoring, heartrate monitoring and lung function monitoring. It will also give an overview of basic sensors and algorithms which are used for analyzing and classifying the input data. Exercise monitoring is able to detect the users repetitions, execution and the exercise itself. It can deliver the user feedback in order to improve his performance. Heartrate monitoring detects the heartrate utilizing sensors provided by a smart device. Lung function monitoring
is able detect features which are used to assess a patients lung function.