Hiyd Gen 2 Reservation: What You Are Signing Up For and What to Expect
A straight explanation of the Hiyd Gen 2 pilot reservation: what you are committing to, what the product does, and what the timeline looks like from sign-up to delivery.
If you've landed on the Hiyd pilot reservation page and paused before completing it, that's a reasonable instinct. A reservation for hardware that hasn't shipped yet deserves a straight explanation of what you're committing to, what you'll receive, and when.
This article covers exactly that: how the reservation works, what the pilot program involves, what Hiyd tracks, and what the timeline looks like from sign-up to delivery.
What the Pilot Program Actually Is
Hiyd is currently in an active pilot phase. The reservation flow at hiyd.ai is the only way to secure a unit from the first batch. This isn't a pre-order in the traditional retail sense. It's a structured early-access program with limited spots.
The product launches on Kickstarter in November 2026. First-batch units are scheduled to ship in Q2 2027. VIP spots are limited, and reserving now secures your place in that queue.
If you're weighing whether to join now or wait, the practical answer is straightforward: waiting means joining a later batch. There's no indication a standard retail channel will open before the pilot allocation is fulfilled.
What Hiyd Is (and How It Attaches)
Hiyd is a biometric sensor that attaches to the back of your existing watch using microsuction. No glue, no magnets, no adhesive residue, and no scratches to the caseback. It's under 3mm thick, 30mm wide, and weighs 7 grams. It fits 95% of mechanical watch casebacks, and Hiyd backs that with a 100% guaranteed fit or money back.
The entire premise of the product is that you keep wearing the watch you already own. You don't adopt a new form factor or put a screen on your wrist. You attach Hiyd to the caseback of whatever you're already wearing, and it works from there.
The device is also non-magnetic, so it won't affect automatic winding or magnetise a mechanical movement. That's a specific concern for mechanical watch owners, and it's been addressed at the hardware level.
What Hiyd Tracks
Once attached and paired with the companion app, Hiyd passively tracks heart rate, heart rate variability (HRV), sleep staging, movement, calories burned, and VO2 max estimation. Nutrition logging is built directly into the companion app, with no third-party integration required. Sleep tracking uses an included SoftBand accessory for overnight wear.
All of this data consolidates into a single view in the app called "The Reading." The Reading presents descriptive health insights rather than prescriptive alerts or coaching nudges. It tells you what your body is doing. It doesn't tell you what to do about it.
That distinction matters if you've used WHOOP or a Garmin and found the constant coaching prompts more noise than signal. Hiyd's approach is closer to a quiet read of your data than a fitness app trying to motivate you.
One note on VO2 max: this is an estimation, not a clinical measurement. Hiyd is not a medical device, and no metric it produces should be treated as a clinical reading.
Battery and Charging
Hiyd has a 30-hour battery life and charges in 15 minutes via a cradle. The cradle works whether the sensor is attached to your watch or detached, so you can charge it overnight while still wearing your watch, or run a short charge during a window in the day.
Fifteen minutes to a full charge is a practical detail worth noting. It removes the friction of planning around battery management.
No Subscription, No Recurring Fees
Hiyd is a one-time hardware purchase. No monthly fees, no annual membership, no tiered access based on what you pay each month.
This is a meaningful difference from the dominant trackers in this category. WHOOP 5.0 requires an ongoing subscription starting at $199 per year. Oura Ring 4 or 5 carries a hardware cost of $349–$499 plus $5.99 per month. Over three years, those recurring costs add up considerably.
Hiyd charges once. Your data is encrypted at enterprise grade and is never sold or shared.
What You Get When You Reserve
Completing the reservation at hiyd.ai secures your place in the first batch. Based on the current pilot structure, that includes a confirmed spot in the VIP queue ahead of general availability, access to the customer dashboard once your unit ships and syncs, the Hiyd sensor, SoftBand for sleep and gym use, and the charging cradle, all at a one-time purchase price with no subscription.
Pricing is not publicly listed. The reservation flow will show current pricing at checkout.
What to Expect Between Now and Delivery
The timeline is clear. Kickstarter launches November 2026. First-batch units ship Q2 2027.
Between reservation and delivery, you won't be waiting in silence. The pilot program includes updates through the customer dashboard and reservation flow. For specific questions about your reservation status, hiyd.ai is the right place to check.
The honest framing: you are reserving hardware in its final pre-production phase. The product exists. The pilot is active. The ship date is Q2 2027. If that timeline works for you, the reservation locks in your place. If you need a tracker this week, Hiyd isn't the right answer right now.
Who This Is For
The reservation makes the most sense for one of two groups.
The first is watch owners who want biometric data without replacing their watch. If you wear a mechanical piece, a dress watch, or a vintage reference you wouldn't trade for a smartwatch, Hiyd fits 95% of mechanical watch casebacks and attaches without leaving a trace.
The second is anyone who has grown tired of paying monthly fees for health data. If a WHOOP or Oura subscription renewal recently landed in your inbox and made you reconsider, the one-time purchase model is the structural alternative.
Both groups get the same product: passive biometric tracking on the watch they already own, with no subscription and no second device on the wrist.
Frequently Asked Questions
What is the Hiyd Gen 2 reservation? The reservation is an early-access sign-up that secures your place in the first production batch of Hiyd. It's available through the pilot program at hiyd.ai. The Kickstarter launches November 2026, and first-batch units ship Q2 2027.
Does reserving cost anything upfront? Pricing is not publicly listed. The reservation flow on the site will show current pricing at checkout. There are no monthly fees at any point. Hiyd is a one-time purchase.
Will Hiyd work with my watch? Hiyd fits 95% of mechanical watch casebacks using microsuction attachment. It is non-magnetic and will not affect automatic winding or magnetise a mechanical movement. Hiyd offers a 100% guaranteed fit or money back.
What metrics does Hiyd track? Hiyd tracks heart rate, HRV, sleep staging, movement, calories burned, and VO2 max estimation. Nutrition logging is built into the companion app. Sleep tracking uses the included SoftBand. All data consolidates into a single view called The Reading.
Is there a subscription required after purchase? No. Hiyd is a one-time hardware purchase with zero monthly fees. Your data is encrypted at enterprise grade and is never sold or shared.
How long does the battery last, and how does it charge? Hiyd has a 30-hour battery and charges in 15 minutes on a cradle. The cradle works with the sensor attached to your watch or detached, giving you flexibility in how and when you charge.
What is The Reading? The Reading is the unified data view in the Hiyd companion app. It presents descriptive insights drawn from your biometric and nutrition data. It does not issue prescriptive alerts or coaching nudges. It describes what your body is doing rather than telling you what to do about it.