A collection of state of the art approaches to monitor health related vital signs and behaviours based on smart devices are presented. To make informed decisions and an accurate diagnosis, medical experts need to monitor the patients symptoms and health. This requires repeated clinical sessions for statistical significant ratings, as traditional measuring techniques have to be carried out by an expert (e.g. to operate the monitoring devices). The available mobile measuring devices are expensive, bulky and usually obtrusive to use. Considered an annoyance self monitoring suffers from low adherence, preventing the early detection of declining health. The ubiquity of smart devices is used to raise the frequency of self measurements, thereby lowering the rate of clinical checkups by the possibility of remote assessment. Furthermore they are used to raise the users awareness of their state of health. Which helps them to make changes to their unhealthy behaviours and supports them during their exercise. Techniques presented monitor amongst others respiration function, heart rate, eating behaviour. As well as offering support for food logging and exercise feedback.