On ZDNet, a writer attributes Apple’s Heart Study to pointing him in the direction of his atrial fibrillation diagnosis, but says additional sensors could do more—such as helping people recognize they might have a sleep disorder.

Beddr’s SleepTuner is not necessarily a replacement for a full-blown sleep study at this time. However, if you have already been diagnosed with sleep apnea, the product is effective for confirming that your CPAP therapy is working correctly — such as a properly fitted mask and a good sleeping position and pillow use/head positioning.