Insert Coin semifinalist: smARtPULSE is a hackable Bluetooth oximeter

Oximeters aren't exactly the sexiest gadgets in the world, but they're definitely quite useful. Monitoring pulse and blood oxygen levels are important for patients in hospitals, athletes trying to squeeze every last drop of performance from their body and anyone making a sudden trip to high altitudes. smARtPULSE uses pretty standard photodetection technology for tracking oxygen levels, but its ability to tether to a whole host of other devices via Bluetooth 4.0 is what really sets it apart. Ther...