Has anyone here ever tried a Sleep Tracking device? It seems like a useful tool to have, particularly for those experimenting with supplements. The device (worn as a watch) records the data as you sleep, which can then be uploaded to your PC. It also has a vibrating alarm, which may be directly useful in becoming lucid. For example, you could set it to vibrate during REM, which would hopefully alert you to the fact that you were dreaming (without waking you up completely), much like the LED's of dream masks.

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