[clewiston]

not exactly similar. Our product uses Actigraphy (http://en.wikipedia.org/wiki/Actigraphy), which is a different method (and in our opinion much less obtrusive) for measuring sleep phases than the Zeo which uses a headband. Also, our unit is wireless and automatically uploads your data to our web server with very little user input (besides setting the alarm before going to bed).

[jrockway]

Similar in the sense that it's a thing that makes a noise when it's time to get up, based on your sleep patterns.