WEAR IT. FORGET IT.
We'll listen.
A titanium ring that reads the temperature shifts, sleep and recovery behind your cycle — and shows it all in the app, free. The only ring built to actually help you conceive.
A NUMBER NEVER HEALED ANYONE.
No tracker has ever been shown to improve a health outcome. Counting your sleep, your steps, your temperature just gives you a wall of data you can't act on — and a low hum of anxiety. Knowing your number doesn't change it. Knowing what to do about it does.
Our patented 200+ signal system doesn't just read data — it interprets your whole physiology, builds a plan around it, and adjusts as your body changes.
Temperature alone is a rearview mirror. We layer cycle, sleep, HRV, stress and recovery into a single physiological picture — in real time.
Kai turns that picture into daily, specific guidance — supplements, timing, nutrition, movement — personalized to your biology, not a demographic.
Every cycle, we compare your signals against your plan and adjust. You see what's working — and what to change.
NOT JUST ANOTHER RING.
Same finger. Wildly different job.
| Feature | The Halo | Oura | Apple Watch |
|---|---|---|---|
| See your own data with no subscription | ~ | ||
| Medical-grade temperature (±0.01°) | ~ | ||
| Built around your cycle & fertility | ~ add-on | ||
| Optional AI that adjusts your supplements | |||
| Wear it 24/7, no screen, no charging daily | |||
| Battery life | 5 days | ~7 days | ~18 hrs |
BLOOD SUGAR, WITHOUT THE NEEDLE.
The Halo Ring uses non-invasive optical sensing to estimate blood-sugar trends throughout the day — no finger pricks, no CGM patches. It's the first ring to give you metabolic context alongside your cycle data.
Spot glucose spikes and dips that affect ovulation, mood and energy — before they become a pattern.
See how meals, stress and sleep map to your metabolic response — contextualized to your cycle phase.
Kai uses your glucose trends to fine-tune supplement timing, meal guidance and movement cues.
SIX SIGNALS, ONE RING.
Catches the subtle basal-temp rise that signals ovulation.
Deep, REM and light sleep — the foundation of a healthy cycle.
Reads how well your body is bouncing back, night to night.
A simple morning read on whether to push or rest.
Tracks the cortisol-driven strain that can blunt ovulation.
Gentle activity context, never a step-count guilt trip.
TRACK FOR FREE. ADD KAI IF YOU WANT HER.
Buy the ring once and track forever — no subscription, unlike Oura. Kai's AI advising is the only thing that costs extra, and she's free to try.
You pay for Kai only if you want her advising — tracking is free, forever, no strings.
FROM YOUR FINGER TO YOUR FORMULA.
Titanium, feather-light, water-safe. Charge it once and forget it for five days. It starts reading the moment it touches skin.
Temperature, sleep stages, HRV, stress, readiness and movement flow to the app automatically. No subscription, no paywall. Ever.
When you're ready, Kai reads your signals and builds a daily plan — supplements, timing, nutrition — that evolves with every cycle.
I'd been throwing money at random prenatals for a year. The Halo Ring showed Kai exactly what my body needed and she built a pack around it. Three cycles later, my temps stabilized for the first time.
One pouch a day instead of five bottles on my counter. And the ring just... works. I forget it's there until Kai pings me with something useful.
Used my FSA, so it was cheaper than the supplements I was buying on Amazon. The egg-quality pack plus the ring data changed everything for us.
QUESTIONS, ANSWERED.
Do I have to pay a subscription?
How is this different from Oura?
Do I need the supplements?
Battery and build?
How do I get the right size?
Is my data private?
PUT IT ON. WE'LL TAKE IT FROM HERE.
Reserve your Halo and start tracking free. Kai's waiting whenever you want her.