Vaavud Smartphone Anemometer

Ever wished you could measure the wind’s speed where you stood at a whim? On the off chance you’ve thought about doing that, plug the double-spooned Vaavud into your phone’s headphone jack and you can. Genuinely useful for kitesufers, windsurfers and paragliders (among others), Vaavud contains absolutely no electronics yet transmits revolutions via two small magnets in its rotor to your smartphone’s magnetometer, accurately gauging the wind’s speed in a small, durable, and relatively compact package.

Preorder on BiteMyApple – $45