Image source: Joule

Make any earring smart with Joule

The world of quantified health hasn’t exactly been focused on women. Most activity trackers and smartwatches have been designed for the male, or at best for the unisex fitness market. This is where Joule by Ear-O-Smart steps in. A universal smart earring backing, so that you don’t have to sacrifice style in pursuit of your fitness goals.

Essential reading: Activity tracking for women – merging fashion with fitness

Image source: Joule

The result of more than 3 years of research and development, the idea behind Joule is brilliantly simple. Pack all the technology of a fitness tracker, into a tiny stud.

Joule can be paired up with pretty much any set of post-styled earrings. The tiny wearable (18mm diameter), houses technology that keeps tabs on your activity and calories burned throughout the day. Joule will even track your heart rate using the same PPG technology (by emitting light from a LED onto your ear), seen in many fitness bands.

Weighing only 1.5 grams, the earring backings are pretty much weightless. For comparison purposes, heavy earrings start from about 5 grams all the way up to 12 grams. That probably makes Joule, the world’s smallest and discreet bio sensor.

Using Bluetooth 4.0 wireless technology, the smart earring backings sync with your smartphone. In addition to providing you with detailed activity stats, the Android and iOS applications will dish out heart rate information while you are working out enabling you to heart-rate zone train.

Most people who exercise will tell you they want to lose weight or simply get fitter. Not many people, however, know what their heart rate is, or where it really should be. This means that often, they are not training in the most efficient way to achieve their goals. Heart rate zone training allows you to achieve your top potential in the shortest amount of time possible.

Image source: Joule

In terms of battery life, Joule will keep going for a full day. Every detail has obviously been carefully thought out. To recharge, simply put the device back into the jewelry case. It will recharge and you’ll have it for the next day. The portable charger/ jewelry case holds about 10 charges.

Activity trackers started off with chunky and unattractive devices aimed at fitness freaks and technology buffs. The tech community is, however, increasingly grasping the importance of designing wearable technology that is both functional and attractive.

Electronics embedded into the products we use in our everyday lives could also be the answer to the high abandonment rate of wearables. Around three in 10 smartwatch and fitness tracker owners abandon their devices because they do not find them useful, they get bored of them or they break, according to a survey by research firm Gartner.

Finally you can say no to all the plastic wrist bands, and have the style you deserve.

Joule will start shipping on April 18th. Pre-orders are available at


Like this article? Subscribe to our monthly newsletter and never miss out!

Ivan Jovin

Ivan has been a tech journalist for over 7 years now, covering all kinds of technology issues. He is the guy who gets to dive deep into the latest wearable tech news.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.