These are independent reviews of the products mentioned, but TIME receives a commission when purchases are made through affiliate links at no additional cost to the purchaser.

Essential tremor afflicts up to 10 million Americans, and most experience life-­complicating shaking of the hands. Cala kIQ is a wearable, rechargeable device that sends electrical impulses from the wrist to the brain, to lessen the physical effects of misfiring neurons and temporarily let the wearer do things like hold a cup with more ease. It’s also approved for patients with Parkinson’s. A peer-­reviewed study found that 80% of patients receiving the type of therapy delivered by Cala kIQ saw tremor power cut at least in half

More Must-Reads From TIME

Contact us at letters@time.com.

Hydration Made Fun
A Modern Flip Phone
A Saliva Pregnancy Test
More Than a Fast Car
A Breakthrough Bassinet
EDIT POST