There is an identified need for objective, reliable, and scalable methods of measuring and
recording sleep. Such methods must be designed for easy integration into people's lives in
order to support both sleep therapy and everyday personal informatics. This paper describes
the design and evaluation of a mobile phone application to record sleep, the design of which
has substantive foundation in clinical sleep research. Two user studies were carried out
which demonstrate that the application produces valid measurements of sleep quality and …

There is an identified need for objective, reliable, and scalable methods of measuring and
recording sleep. Such methods must be designed for easy integration into people's lives in
order to support both sleep therapy and everyday personal informatics. This paper describes
the design and evaluation of a mobile phone application to record sleep, the design of which
has substantive foundation in clinical sleep research. Two user studies were carried out
which demonstrate that the application produces valid measurements of sleep quality and …