Review: Reliefband Flex Attaches to Your Apple Watch to Quell Motion Sickness The $180 Reliefband Flex is an anti-nausea accessory that is designed to attach to an Apple Watch, allowing for a single wrist-worn device that is able to cut down on or eliminate motion sickness, migraine nausea, pregnancy nausea, and more. You might be wondering what an anti-nausea device has to do with Apple, but many VR headsets cause motio…