Cerulean Spark (ceruleanspark)'s status on Friday, 15-Nov-13 21:19:20 UTC

  1. Cerulean Spark Cerulean Spark

    @arcanepony43 Strictly speaking any phone with a high res camera and an LED flash can be used to measure your heart rate and blood oxygen levels.

    Friday, 15-Nov-13 21:19:20 UTC from web in context