Health and performance, for iPhone
Helix connects recovery, sleep, training load, nutrition and your training plan, measures each against your own baseline, and turns them into one clear read every morning. It works with the watch or ring you already wear.
Through Apple Health. Fitbit connects via Google Health.
Five into one
Sleep, training load, nutrition and recovery all affect each other. Read in isolation, each one misleads. Read together, they show how you’re adapting.
How Helix reads you
Helix doesn’t judge a number on its own. Each signal is compared with your own 30-day baseline, weighed against the others, and resolved into the few answers that shape your day.
Inside a score
It starts from your own normal. Each signal then moves it up or down by how far last night sat from your baseline. What’s left is today’s score, and you can see every step.
From the first morning
Up to 90 days of history imported from Apple Health on first launch, and processed on your phone.
Personal baselines for HRV, resting heart rate, sleep and training load, ready before your first morning.
Every score is relative to you, so there is no calibration period and no population average.
Every morning
Before you train, Helix weighs last night’s recovery against the load you’ve been carrying.
Readiness
Built from HRV, resting heart rate, sleep and recent load, each measured against your baseline. Every contributor is visible, with an estimate of when you’ll be ready for intensity again. If a signal is missing, the score says so.
Sleep
Stages, wake episodes and overnight heart rate, set against the sleep your recent training actually requires.
Load
Daily strain from heart rate accumulates into fitness and form. The ramp rate warns you when load is rising faster than you can absorb it.
Timetable
Programmes from Helix AI or a specialist coach sit in your week, and each session is weighed against that morning’s readiness.
In context
Ninety days of HRV, with the band that is normal for you. Scroll, and the lens reads each night as Helix does: the value, and how far it sits from your baseline.
7
signals in every readiness score
30-day
rolling baseline for each signal
90 days
of history read on first launch
64
people in a single group
0
ads, trackers or data sales
Try a morning
Change last night’s sleep, your HRV and yesterday’s strain. In the app, Helix uses more signals and measures each against your own baseline.
A simplified model for illustration. Not medical advice.
Keep it moderate.
Sleep was close to what you needed, but HRV is below your normal.
Nutrition
Photograph a meal and Helix estimates energy and macronutrients portion by portion, then measures them against the demands of the day’s training.
Helix AI
Ask why your HRV has fallen this week, or whether tomorrow’s intervals still make sense. Helix AI answers from your own data, and can log meals, build a training week or move a session.
How has my HRV been this month?
Helix AI
Down about 8% across the month, with the dip in the last ten days. That lines up with the block you’ve just done, rather than anything new.
Should I do the intervals tomorrow?
Groups
Each member follows their own programme. The group sees readiness, sleep and load side by side, as each person chooses to share, and keeps one streak together. Skipping is harder when the gap has your name on it.
This morning
Everyone’s readiness, sleep and load, as shared
One shared streak, with freezes and planned rest days.
Pacts for the habits that drive recovery, like fourteen nights asleep by eleven.
A feed of sessions, meals and milestones.
Sharing is set metric by metric, so sleep can be visible while weight stays private.
Invite
Share a link, or hold up your group’s code. One scan from a friend’s camera and they’re in.
Group invite
Dawn Patrol
Activity
Record runs and rides with GPS route, pace and heart rate. Afterwards, Helix shows what the session took out of you and how long recovery should take.
A day with Helix
Most of its work happens in the background. These are the moments you’ll see.
Short on sleep and HRV is down. Keep today easy.
Four questions that capture what a sensor can’t.
Salmon, potatoes, greens. 615 kcal, measured against today’s training.
Hill loop, 6.21 miles in 51:32. Then what it cost, and when you’ll be ready again.
Four of five have shown up. Cass still has until 8pm to keep the streak.
Your week’s load, sleep and readiness, beside your group’s.
Also in Helix
Every Monday: your week’s load, sleep and readiness, beside your group’s.
Readiness, sleep and the group on your Home Screen and Lock Screen.
Today’s readiness on your wrist.
One notification each morning with the reading that matters.
Flags when several overnight markers deviate together. Not a diagnosis.
Lock Helix behind Face ID.
5K to marathon predictions from your recent efforts.
Correlations in your own data, tested for statistical significance.
Blood markers and clinical records, stored on your phone.
Method
The method behind every score is published in full. Four principles run through all of it.
Read the methodEvery reading is compared with your own rolling 30-day normal. Two people with the same HRV can be in very different states.
Daily strain builds into fitness and form, so a hard week reads differently from a hard day, and the ramp shows how quickly load is rising.
When a signal is missing, the score widens into a range instead of guessing. You can always see what it stands on.
Relationships in your data are checked for statistical significance before Helix calls them a pattern.
Coach mode
Coach mode shows who’s ready, who’s steady and who needs attention each morning, with a page per athlete for HRV, acute:chronic load, sleep and wellness. Each athlete decides what you see.
Your coach code unlocks Coach mode and Premium for your own training.
Premium through your link, once per athlete.
Approve each athlete, or let them straight in.
Privacy
Helix processes health data on your iPhone. Only what you choose to share ever leaves it.
On-device by default.
Analysis runs on your iPhone, and GPS routes never leave it, even when you post a session.
Shared by metric.
Your group sees only the metrics you switch on, and you can change them at any time.
AI off by default.
Nothing reaches Groq, our AI provider, until you opt in. Groq retains nothing and doesn’t train on it.
No ads or tracking.
No advertising, no third-party analytics and no data sales.
Pricing
No card required. Then £1.54 a week, billed annually at £79.99, or £4 a week with no commitment.
Due today
£0
Full access. No card required.
After 14 days: £79.99 a year. Nothing is charged automatically.
Cancel any time in your App Store settings. Restore a purchase or redeem a code at any time.
No. Helix reads Apple Health, so the Apple Watch, Garmin, Oura or Fitbit you already wear works. Fitbit comes through Google Health.
Only what you choose to share, metric by metric. Share your sleep but not your weight, and change it whenever you like.
No. Helix AI is off until you turn it on, and it shows you exactly what it sees before you agree.
All of Helix is free for 14 days, with no card. Then £79.99 a year, which works out at £1.54 a week, or £4 a week with no commitment. You’ll get reminders on days 11, 13 and 14. Nothing is charged automatically: at the end you choose a plan, and your data is kept.
Helix comes to iPhone in the UK on 1 December 2026. Join the waitlist and we’ll email you the morning it lands.
Not yet. Helix is built for iPhone, with a companion Apple Watch app.
Join the waitlist and we’ll send one email on launch morning.
