The Sleep Cycle app uses the accelerometer in your iPhone to detect your movements while you sleep. You move in different ways throughout the night, and these movements are tied in with the different phases of sleep you pass through, from light sleep, to REM sleep to deep sleep, and back again.
A skills assessment is typically utilized in professional environments in which it is used to evaluate the productivity and professional potential of a person. This type of assessment can be used to analyze how well a possible new-hire might fit into a particular environment.
Some companies use the DISC assessment as a way to screen potential employees, with the thought that a certain personality type would be better or worse in certain jobs or positions. This is not what the DISC assessment was initially designed for. DISC is a tool to get to know oneself, others and behavior in interpersonal situations better. The best use of DISC is to learn more about oneself, others and how to deal with situations where interpersonal relationships are involved.