Joule is a tiny smart backing for the earrings you already love — quietly tracking your heart rate, calories and activity, all day, and always out of sight.
Be first in line. Early members receive launch-day pricing.
No more plastic bands that clash with every outfit. Joule slips behind the earrings you already own and keeps up with your whole day.
Stay in your zone. Joule reads your pulse in real time, so every walk, class and workout truly counts.
Most calories burn outside the gym. Joule captures your whole day — not only the hour you exercise.
Syncs to your phone over Bluetooth and gently logs your movement from morning to night.
About 1.5 grams — the lightest tracker in the world. So comfortable you'll forget it's there.
Designed to disappear behind your earrings. The cleverness stays hidden; only your style shows.
Pairs with any post-style earrings you own. One little treasure, infinite looks.
Open the Joule app and your day comes to life — activity rings that fill as you move, your heart rate through the day, and gentle encouragement to keep going.
The fitness tracker that finally matches your style.
Trouble playing? Watch on YouTube ↗
“One of the best ideas for a wearable device I've seen — proof that wearables can reach far beyond smartwatches.” — Gadgets & Wearables
Joule is almost here. Join the waitlist and we'll let you know the moment it launches — with exclusive early-member pricing as our thank you.
Press, partnerships or just curious — send us a note and we'll get back to you.
Prefer to talk? Call or text us toll-free at +1 (888) 899-9937. We reply to messages you send us; we won't text you otherwise.