Heir discreet wearable sensor

Smart tech.
Completely invisible.

The Heir is a discreet wearable that attaches to any watch caseback. Adding activity tracking, notifications, and media control - without compromising your style.

The Heir
The Heir
The Heir
The Heir
The Heir
The Heir
The Heir
The Heir
The Heir
The Heir
The Heir
The Heir

The Heir

Shipping Spring 2026. 
Winter 2025 batch is sold out. Pre-orders for Spring 2026 are open.

A small sensor that attaches to any watch, instantly adding modern smart features without compromising your style.

What it does?:

  • Track Your Activity
    Monitor your activity that gets sent to the Ganance mobile App.
  • Stay Connected
    Receive calls, texts, and app alerts via haptic vibrations.
  • Tap to Control
    Manage music, calls, and apps by tapping your watch face.
  • Keeps your Style
    Tech that stays out of sight, letting your watch take center stage.
$149.00
/
No Subscription Required
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HSA/FSA Eligible for qualified customers.
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Haptic Vibrations

Haptic Vibrations

Activity Tracking

Activity Tracking

Magnet-Free

Magnet-Free

Keep Your Style

Keep Your Style

Cancel Your Pre-Order for Free

Cancel Your Pre-Order for Free

No Subscriptions

No Subscriptions

Works with Any Watch

Works with Any Watch

Software Upgrades

Software Upgrades

The Heir is a small sensor that attaches to any caseback, enhancing it with smart watch features.

No Magnets. No Tools.

Track your activity, stay connected for key notifications, and control your media all from any watch.

Paired with our mobile app, you can wear your favorite watches and gain the smart features you need.

1) What is the Heir?

The Heir is a small sensor that sticks to the back of any watch, turning it into a smartwatch.

Your watch can now track your activity and notifications all without changing your look and feel.

2) Can I move the Heir between different watches?

Yes. The Heir attaches with tiny suction pads, so you can move it between watches without tools or damage.
We do NOT use magnets

3) Is a Subscription Required?

No. You own the Heir outright upon purchase.

4) Is the Heir compatible with both iOS and Android?

Yes.

5) Does my data integrate with Apple Health and/or Google Fit?

Yes.

6) How long is the battery life?

The battery lasts about 42 hours and fully recharges in about one hour.

Height: 3mm

Diameter: 30mm

Weight: 5g / 0.2 oz

Battery Life: 42hrs, rechargeable

Charge Time: 1.5hrs

Materials: Stainless Steel, UV Coated Plastic

Attachment: Removable, non-residue micro-suction

Water Resistance: Splash-proof. Normal wear, hand-washing, etc. Not rated for submersion

App compatibility: Apple iOS & Android

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Health tracking shouldn't ruin your style

Traditional smartwatches force a tradeoff - functionality or style. This eliminates that choice.

Featured In

Wear your favorite watch again.

Step 1

Stick

Attach the Heir to the back of your watch. No magnets, no tools, no damage - just peel and press.

Stick

Step 2

Sync

Connect it to your phone to track activity, control media, and get notifications instantly.

Sync

Step 3

Swap

Peel it off and move it to another watch anytime. The Heir goes wherever your style does.

Swap
Heir device compatibility mobile Heir device compatibility desktop

Wearable Technology, Your Way

Feature The Heir Other Wearables
Keep Your Style
No Screen
Lightweight & Comfortable
Keeps You Connected with Key Notifications
Tracks Activity & Health Data
Apple Health & Google Fit Integration
One-Time Purchase (No Subscription)
Hear from Our Early Adopters
Secure Checkout

Secure Checkout

Beta Reviews

4.9★ Beta Feedback

Pre-orders

Thousands Pre-Ordered

Cancel Anytime, Full Refund

Cancel Anytime, Full Refund

Frequently Asked Questions

No subscription required. You own the Heir outright upon purchase.
Yes, the Heir attaches using micro-suction technology, allowing for easy transfer between watches without leaving any residue or damage.
The Heir is fully compatible with iOS. Android support is currently in beta and will be fully available by Spring 2026.
Yes, all health data tracked by your Heir syncs seamlessly with Apple Health. Integration with Google Fit is coming soon.
The Heir securely attaches to the back of your watch using reusable micro-suction technology, ensuring a firm grip while allowing for easy removal.
The Heir provides up to 42 hours of battery life on a single charge, depending on usage.
The Ganance Heir is splash-proof, making it resistant to light exposure to water but not suitable for swimming or full submersion.
The Summer and Winter 2025 shipments are SOLD OUT. The Heir is available for pre-order now, with limited quantities available. Next shipments begin in Spring 2026.
We offer a 14-day return policy if you’re unsatisfied with your Heir. Simply return it in its original condition for a refund.

Never Miss a Step

Stay on top of your wellness with the Ganance app, where all your health data is seamlessly tracked and displayed in real-time. From step counting to calories burned, every movement is recorded and visualized for easy insights. Checking your daily activity trends, monitoring progress over time, or optimizing your fitness goals, our app keeps you connected to your health.

One Upgrade for Every Watch You Own

Easily switch the Ganance Heir between all of your favorite timepieces. Leveraging our microsuction attachment technology, you only need one Heir to add smart functionality across your entire collection - no tools, no hassle, just seamless functionality.

Your Experience, Your Way

Take control of how you interact with the Heir. Customize taps, vibrations, alerts, calls, and media to match your lifestyle. The Heir adapts to you, not the other way around.

Ganance Heir

Ganance Heir

$149 (Pre-order)