Embrace comes with an app called Mate.  Mate tracks your physical activity and provides an in-depth rest analysis. 

We've based our rest analysis algorithm off of the following studies:

• Landry et al (2015) Measuring sleep quality in older adults: a comparison using subjective and objective methods
• Aubert-Tulkens et al (1987) Ambulatory Evaluation of Sleep Disturbance and Therapeutic Effects in Sleep Apnea Syndrome by Wrist Activity Monitoring
• Patel et al (2015) Reproducibility of a Standardized Actigraphy Scoring Algorithm for Sleep in a US Hispanic/Latino Population
• R. J. Cole, et al (1992) “Automatic sleep/wake identification from wrist activity"
• Ohayon et al (2004) Meta-Analysis of Quantitative Sleep Parameters From Childhood to Old Age in Healthy Individuals: Developing Normative Sleep Values Across the Human Lifespan

Read more about Mate's analysis of rest here.