
Performance
3-month supply · 4 supplementsCreatine · whey isolate · electrolytes · magnesium
HELIOS 2.0
Matt black titanium smart ring that reads your body day and night. 2.1 g, 7–10 days a charge, travel charger in the box.
Farina + Free Cliq
Smart front and rear lights that switch on at dusk, flare when you brake and run from the THRIVE ride screen.
Why THRIVE
What THRIVE does for your riding, goal by goal.
Drag to turn it, drag up or down to tilt, pinch to zoom.
Inner diameter for each US size. Wear it on whichever finger fits snugly; it fits under cycling gloves.
Not sure of your size? Choose the free sizing kit. We send it first, you try it and tell us your size, then your ring ships.
Tap the case to open and close it, drag to turn it.
❮ Coaches' Choice ❯
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120+ cycling coaches recommend HELIOS to their riders. Learn more
The all-in-one cycling health and performance system.
Your ring is dispatched within 2 days (after size selection).
All rings ship in the size you pick. Different sizes? Choose the free sizing kit.
or 4 × $62.49 interest-free with afterpay Klarna.
In stock · ships in 2 business days
30-day money-back trial. Wear it for 30 days. Not for you? Send it back for a full refund.
90-day results guarantee. Set your target with our team. Ride the plan, and if you miss it, we refund you in full.
HELIOS 2.0Matt Black titanium, in your size1x
Travel ChargerHolds another 3–4 weeks of charge. USB-C cable included1x
Free Sizing KitSent first if you need it
MARCO, your AI coachBuilt into the THRIVE app
THRIVE App AccessYour training plan, fuelling plan, recovery score, ride mode and MARCO, your AI coach. First month free, then $8.99/monthPersonalised supplement packs to aid your recovery and support your goals, delivered straight to your door. Add one with your HELIOS ring and the pack is 20% off.

Creatine · whey isolate · electrolytes · magnesium

Creatine · whey isolate · collagen + C · omega-3 · vitamin D · turmeric · zinc · magnesium + ashwagandha

Whey isolate · electrolytes · magnesium + ashwagandha · omega-3 · vitamin D
As seen in
My riders used to send me three apps’ worth of data. Now recovery, plan and fuelling sit in one place, and the plan moves before they dig a hole.
Once my masters riders trained to their morning recovery score, they stopped forcing hard days. They turn up fresher for the sessions that count.
Most riders under-fuel and call it discipline. THRIVE sets carbs from the day’s training, so hard days get fed and rest days stay lighter.
Riders over 40 recover slower, and most plans ignore it. Seeing sleep and HRV each morning lets them fuel and rest for the body they have.
THRIVE reads your sleep, HRV, resting heart rate and skin temperature through HELIOS every night, against your own baseline. Catch the warning signs early, so tired legs never become burnout, a weakened immune system or an injury that ends your season. Wake up knowing whether to push or hold, and back your recovery with personalised supplements.
Get fuelling wrong and it costs you either way. Under-fuel and your power, recovery and long-term health pay for it. Eat until you’re full and the scale won’t move. THRIVE sets your calories and carbs from your body and each day’s training, and plans the fuel for every ride.
Fuel Curve (beta) predicts your energy through the day from your food log, your rides and HELIOS, so you see a dip coming and eat before it hits.
Stack hard sessions on tired legs and sooner or later something gives: you get sick, injured or simply stop getting faster. THRIVE builds your plan around your goal and event date in real phases: base, build, peak, taper. When a bad night or a busy day gets in the way, it moves your hard days to when you’ve recovered, and you approve every change.
THRIVE turns your phone into your bike computer: navigation, Climbing Mode, live power and heart rate, with every interval graded against its target.
HELIOS 2.0
HELIOS enhances your training by tracking your body 24/7, fuelling every ride, and helping you build fitness consistently with less risk of overtraining.
Precisely calibrated sensors designed to read your heart rate, HRV, sleep and recovery, day and night.
Every morning you get a recovery score from your sleep, HRV and resting heart rate, and a training window for the day, so your hard sessions land on days you have recovered.
Rides record in ride mode, with power, heart rate and navigation on your phone. Strength and mobility sessions log in the same app and count toward your training load.
THRIVE AI, the model inside the app, sets your training, fuelling and recovery every morning from your recent rides and recovery. Your AI coach, MARCO, plans your rides and meals and answers by voice or text from your own data.
The world’s slimmest and lightest smart ring: 2.0 mm thin, 6.5 mm wide and 2.1 g of matt black titanium, so it stays comfortable on the bike, at work and asleep.
7–10 days per charge, and the travel charger in the box holds another 3–4 weeks of charge, so you can leave the cable at home.
Our world-first, science-based AI system for cycling.
THRIVE AI works in unison with every part of your day: training, recovery, sleep, stress and nutrition. It finds what’s holding your riding back, whether that’s a plateau, your age, an injury or your weight, and MARCO, your AI coach, shows you the daily actions that move it most.
Eight weeks stuck at 248 W, riding 8 hours a week around a full-time job. Here’s what THRIVE AI found, what it changed, and where his FTP went.
FTP
248W
Stuck for 8 weeks
0%100%
−5W
0100
−4W
04
Carbs · Protein · Fat · Vitamins
−3W
5 h9 h
−2W
Aged 47, riding hard days back to back while his HRV slid under his baseline. Here’s what THRIVE AI found, what it changed, and how far his athletic age came down.
Athletic age
47
Real age 47
03
+1.5years
3080
+2years
04
Carbs · Protein · Fat · Vitamins
+1year
7045
+1.5years
Back on the bike after a knee injury and wanting to go straight back to 8 hours a week. Here’s what THRIVE AI found, and how it brought him back to full load.
Full load in
6 weeks
Estimate on day 1 back
+50%0%
+1week
0100
+0.5week
04
Carbs · Protein · Fat · Vitamins
+1week
5 h9 h
+0.5week
Trying to lose weight without losing power, on fasted rides and 5-hour nights. Here’s what THRIVE AI found, what it changed, and the result.
Weight
84.0kg
Starting weight
03
+0.8kg
0100
+0.3kg
04
Carbs · Protein · Fat · Vitamins
+0.6kg
5 h9 h
+0.7kg
Here’s what he does for you.
MARCO reads last night’s sleep, HRV and resting heart rate against your own baseline, and tells you what today’s score means for your riding.
Fitness, fatigue and form from every ride you’ve logged, so you know whether you’re tired from training or from everything else.
One call each morning, hard, easy or rest, from your recovery and recent load. Ask why and he shows you the numbers behind it.
The session for today, with real targets. One tap starts it on the ride screen.
What’s working in your recent training and what to change, from your HRV, sleep and rides over weeks, not one night.
Six questions: goal, event date, experience, hours, schedule and strength. He builds a multi-week plan in real phases, base, build, peak and taper.
A bad night, a missed session or a big unplanned ride: he works out what should move and shows you the change. You accept it or you don’t.
This week’s training around your schedule, with hard days where you can recover from them and strength on the days it fits.
Taper, fuelling and key sessions for your event, counted down from the date you set.
Ask for “20 km, flat, from here” and get three loops that fit, with distance, climbing and time. Save one and it’s on your ride screen.
Where you lose time uphill and the block that fixes it, built into your plan.
Every interval graded against its target, held it, overcooked it or faded, and what to do next time.
When to test next and which protocol, so you test fresh instead of tired.
Say what you ate, whole dishes included. He finds each food, stages it for your review and adds it to today’s diary.
The rest of today’s meals, fitted to the calories and protein you have left, with recipes.
Daily calories and carbs set from your body and that day’s session. Hard days get more, rest days get less.
What to eat before, how many carbs an hour during and what to take after, worked out for that ride.
Full-screen voice. Ask out loud and he answers out loud. Interrupt him any time.
A check-in schedule you set once. He keeps to it without you opening the app.
Pin what he should always remember: your event, an injury, when you can ride. Every past chat is kept.
He knows which screen you’re on, so “why is this red?” needs no explaining.





Check my recovery

Recovery 82. HRV is 24% above your baseline and you slept 70/100, so today’s sweet-spot session is on.
Recoverytoday
Why am I tired?

Fatigue is 69.4 against fitness of 65.8. You’re carrying training load, not just a long week. Two easy days and you’re fresh.
Training loadlast 6 weeks
65.8
Fitness
69.4
Fatigue
−3.6
Form · mildly loaded
Should I rest today?

Hard day. Recovery 82 and form −3.6 mean you can absorb the planned work. Skip any bonus intensity.
Today’s call
Recovery 82, form −3.6: you can absorb the planned work.
Zone 2 only, keep it conversational.
Off the bike. Mobility if you want it.
MARCO: “Hit the planned work clean. Skip bonus intensity.”
What’s my workout today?

Sweet spot, 75 minutes: 3 × 12 min at 88–93% FTP with 5 min easy between. Tap to start it.
Today’s workout
Sweet spot 3 × 12 min
75 min · intervals at 88–93% of FTP · 5 min easy between
How are my trends?

HRV is 93 ms today against a 7-day baseline of 75 ms. The extra sleep this week is working.
HRVtrend
93 ms ▲ 24%
Overnight HRV against your rolling 7-day baseline
Draft me a training plan

What are we training for? Pick the goal, length, hours and your hard days, and I’ll build it in phases.
What are we training for?
Goal
Length
Hours a week
Hard days
Can you tune my plan?

Two short nights, so I’ve moved Wednesday’s VO₂ max session to Friday and made Wednesday 90 minutes easy.
Plan updatetap to accept
Your HRV has sat under your baseline for 3 days. Here’s the change:
Plan my week

8 hours this week: hard days Wednesday and Saturday, strength on Friday, rest on Monday.
This week
8 h this week · hard days Wed and Sat
EnduranceHard dayStrength
Get me ready for my race

8 weeks to your event: 3 base, 3 build, 1 peak and 1 taper. You’re in week 6.
Race prep8-week plan
Gran fondo in 3 weeks
Peak week next, then the taper: less volume, same intensity, and your fuelling plan for race day.
20 km, flat, from here

Three loops that fit. Sunnyside loop: 19.9 km, 344 m of climbing, about an hour.
Route options20 km · flat
19.9
km
344
m elev
1h 2m
est time
How do I climb better?

You lose the most time on the last 1.4 km at 8%. I’ve added a climbing block to your plan.
Climbfrom your saved route
4.2 km at 6.1% · 257 m up
Where you lose time: the last 1.4 km. Two over-under sessions a week for the next 4 weeks.
Debrief my last ride

Two intervals held, the third overcooked at 275 W and the fourth faded. Start the third at target next time.
Interval reportlast ride
4 × 8 min threshold · Saturday
MARCO: “Start #3 at target, not above it, and #4 holds.”
When should I test my FTP?

Day 9, after your recovery week. Your form goes from −3.6 today to +8.
FTP testbest day to test
Next Wednesday form +7.4
After your recovery week, fresh but not flat. Ramp test, 20 min warm-up.
Chicken burger, a porterhouse steak and a green salad

Logged: 1,423 kcal and 96 g protein so far. 1,914 kcal to go today.
Logged to your diary
1,423 / 3,337 kcal today
96 g protein logged · 1,914 kcal to go
Plan my meals

Two meals fill 1,866 of your 1,914 kcal left, with 97 g protein: a yogurt carb bowl after the ride, then chicken pasta.
Meal plantimed around your ride
What should I eat today?

Hard day: 3,337 kcal with 521 g carbs, 140 g protein and 77 g fat. Carbs drop tomorrow, protein stays.
Today’s fuel
3,337 kcal · hard day
Set from your body and today’s 75-minute session, never below your floor
Carbs
521 g
2,084 kcal
Protein
140 g
560 kcal
Fat
77 g
693 kcal
Rest day tomorrow: carbs drop, protein stays.
How do I fuel Saturday’s long ride?

100 g carbs before, 70 g an hour during, then 90 g carbs and 25 g protein after.
Fuel a long rideSaturday
3 h endurance 210 g carbs on the bike
Before
100 g carbs
2 h before you roll
During
70 g an hour
35 g every 30 min
After
90 g carbs
+ 25 g protein
Can I just talk to you?

Yes. Tap the mic and talk. I answer out loud, and you can cut in any time.
Voice modelistening
Check in with me

Set: every morning at 7:00, after every ride, and Sunday at 18:00 for your week review.
Check-ins
Set once. MARCO keeps to it without you opening the app.
Recovery score and today’s call
Debrief and what’s next
Week review and next week’s plan
Remember my knee

Pinned: no big-gear efforts on climbs for your left knee. Every plan I build takes it into account.
Memory4 pinned
Pinned by you. Every answer takes them into account.
Explain this screen

Ask about anything you’re looking at. I already know which screen you’re on.
Ask about any screen
HRV · last 7 nights
48 ms
Most riders only find out they’ve overdone it once they’re sick or injured. Every morning MARCO briefs you before you ride, from your sleep, recovery and last rides, so you see it coming. Ask him why you’re tired or what to ride today, by voice or text, and every change to your plan is shown to you first.
He sets your carbs per hour, daily targets matched to your training load and meals that fit what’s left of today, with personalised supplements to match, so you finish strong instead of fading.
Backed by peer-reviewed studies and scientific research, THRIVE is built to deliver results in recovery, performance, and longevity.

HRV-guided training study
7.3%
More power over a 40-minute time trial
after 8 weeks of training set by a morning HRV reading
Javaloyes et al., 2019

Polarised training study
17.4%
Longer time to exhaustion
after 9 weeks of polarised training
Stöggl & Sperlich, 2014

In-ride fuelling trial
8%
Better time-trial performance
with glucose + fructose during the ride vs glucose alone
Currell & Jeukendrup, 2008

Recovery nutrition study
27%
More muscle fuel restored in 4 hours
with carbs + protein after a hard ride vs carbs alone
Ivy et al., 2002

Strength training study
7.8%
More power late in a long ride
5-min all-out after 185 min, with 12 weeks of heavy strength work
Rønnestad et al., 2011

263,450-person study
41%
Lower risk of death from any cause
for people who ride to work vs those who don’t
Celis-Morales et al., 2017
Free for 30 days
Take the 2-minute quiz and we build your training plan, nutrition plan and ride computer in the THRIVE app from your answers. Ride it free for 30 days, no ring needed, and see what it does for you before you buy HELIOS.
A multi-week plan built for your goal, your event date and the hours you have, with strength and mobility on the right days. Every session has real targets, and one tap starts it in ride mode.
Daily calorie and carb targets set by that day’s training, with what to eat before, during and after each ride. Log meals by voice, photo, barcode or search.
Your phone on the bars becomes the bike computer: map, turn-by-turn navigation, Climbing Mode and your live numbers, with every ride recorded.
A coach built for cycling and nothing else. Ask by voice or text and he answers from your own plan and rides, and every change he suggests is shown to you first.

Bike computers, fitness watches, sleep rings and coaching apps each solve one piece. THRIVE is the only one built to do all of it: your recovery, your plan, your fuelling, ride mode and a coach.
Get the HELIOS ringResults that speak for themselves
“MARCO flagged "three days of suppressed HRV and elevated resting HR — recommend two days easy". I ignored him, did the threshold workout, blew up. Now I listen.”
“MARCO kept me from blowing up at the wrong moment three different times across 28 hours of riding. Fueling reminders alone earned the subscription.”
“I followed the training plan MARCO built for me for the full 90 days. PRs on three different climbs. The plan adapted weekly based on what the ring saw. No marketing claim — just my data.”
“Stupid as it sounds, this is the first wearable I haven't taken off in 6 weeks. No bulk, sits flat under my work glove, charges in 45 min. The MARCO morning summary is the most useful 4-second thing I read all day.”
“I have sensitive skin and a chest strap was hell on every long ride. This replaces it and the readings are within 1-3bpm of my old strap on intervals.”
“We coach a 60-person charity ride program. Bought 6 HELIOS rings for our lead riders. Plan management has been transformed. MARCO effectively scales me as a coach. The volume discount conversation with THRIVE was easy too.”
Yes. HELIOS 2.0 is in stock and ships within 2 business days once your size is known.
Pick your size if you know it (US 7 to 14). If you don’t, choose the free sizing kit: we send it first, you wear your closest size for 24 hours, confirm it in the app, and your ring ships.
No. HELIOS and the THRIVE app replace your bike computer, power meter and heart-rate strap. Your phone on the bars becomes the ride screen.
No. HELIOS is a closed system: it connects to the THRIVE app, the Farina light and the Cliq taillight, and nothing else.
MARCO is THRIVE’s AI cycling coach. Ask him by voice or text and he answers from your own sleep, recovery, rides and fuelling, and every change he suggests is shown to you first.
The app plan is what turns the ring’s readings into your recovery score, training plan, fuelling and coaching. Your first month is included, then it’s $8.99/month. Cancel anytime.
The THRIVE app is live on the App Store. Android is in development.
7–10 days per charge, depending on use. The travel charger in the box charges it over USB-C and holds extra charge, so you can top it up away from a socket.
HELIOS 2.0, the travel charger, a USB-C cable and a quick-start guide.
Yes. It’s water resistant to 100 m (330 ft). Rain, showers and swimming are all fine.
Grade-5 titanium in Matt Black, brushed all over, with the sensors under a clear coat on the inside. It’s 6.5 mm wide, 2.0 mm thick and weighs 2.1 g.
1-year coverage: accidental damage protection and a 3-year warranty. 2-year coverage adds theft and loss protection and a 5-year warranty.
Wear it for 30 days. If it’s not for you, send it back for a full refund.
Yes. We don’t sell your data.
Our team is one tap away in the app or on the support page.
Still on the fence? Chat with a HELIOS expert ›
Based on 1,247 reviews
Wore it for 6 weeks before this review. HR tracking is within 2bpm of my Polar H10 in every ride I've put it through — including a 4hr threshold day. The MARCO coach is the part I didn't expect to use, but I check it every morning now. Single best thing I've bought for cycling this year.
I've cancelled TrainingPeaks and the headspace app I never opened. Sleep tracking is more useful than my Oura was because MARCO actually says something with it. Battery genuinely lasts 7 days.
Hardware is excellent. SpO₂ trending during a 3-week training block has been eye-opening. Knocking a star because pairing took two attempts — once I rebooted the ring it stuck. App could also use a way to silence MARCO for a day, not just turn him off.
Tested side-by-side with my old Oura for two weeks. HELIOS readiness called my flat days more accurately and I never feel it through a glove. Worth the upgrade.
Three rings to try. Settled on size 11 — first one was too tight after long descents. Loving the build quality. The DLC coating still looks new after 2 months of bike maintenance grease.
IP68 holds up fine in the pool. But the app's cycling-mode is so good that swim metrics feel like an afterthought. Hoping for a swim-stroke detection feature. Will keep wearing it.
Stupid as it sounds, this is the first wearable I haven't taken off in 6 weeks. No bulk, sits flat under my work glove, charges in 45 min. The MARCO morning summary is the most useful 4-second thing I read all day.
MARCO flagged "three days of suppressed HRV and elevated resting HR — recommend two days easy". I ignored him, did the threshold workout, blew up. Now I listen.
The product itself is 5 stars. Knocking it down because $8.99/mo locks the features I bought it for. I get it, AI costs, but it should be clearer upfront that the ring becomes a basic HRM without it.
Didn't know I needed posture feedback from a ring. Using the app's bike-fit checks fixed a knee pain I'd been ignoring for 8 months. That alone was worth the price.
I have sensitive skin and a chest strap was hell on every long ride. This replaces it and the readings are within 1-3bpm of my old strap on intervals.
Ring is excellent. The app is designed for phones — on my iPad it's just stretched. Would love a tablet layout for those of us who do post-ride analysis at a desk.
I sold my Fenix. HELIOS gives me everything I actually use, in a form I forget I'm wearing, and MARCO's tactical advice for crit racing is better than any pre-race podcast I've listened to.
I ride 3-4 times a week for fun. The sleep insights and the gentle prompts about caffeine timing have changed my evenings. I sleep 40 minutes more on average. MARCO doesn't pester.
Said 7-day battery. In -8°C riding I got closer to 5 days. Otherwise excellent — would buy again. Just wish the marketing was clear about cold-weather behaviour.
We coach a 60-person charity ride program. Bought 6 HELIOS rings for our lead riders. Plan management has been transformed. MARCO effectively scales me as a coach. The volume discount conversation with THRIVE was easy too.
Cyclocross season, multiple bike washes, one accidental dishwasher trip (don't ask). Still here, still accurate. The mud caked on it didn't even affect optical HR.
Love it for outdoor. Indoor sessions take about 5 minutes to auto-detect. I'd prefer a manual mode toggle. Otherwise excellent investment.
MARCO kept me from blowing up at the wrong moment three different times across 28 hours of riding. Fueling reminders alone earned the subscription.
Lost my charger on a trip. Email at 11pm, response by 9am next morning, replacement shipped same day. The product is good. The support is the reason I'll repurchase.
Everything I need is in the app, which is the whole point. My only ask is a web dashboard for digging into my numbers on a big screen after a hard block. THRIVE says it's on the roadmap. Would re-rate to 5 if/when.
I followed the training plan MARCO built for me for the full 90 days. PRs on three different climbs. The plan adapted weekly based on what the ring saw. No marketing claim — just my data.