“The tactile reminders make it easier to just focus on breathing without the distraction of counting or looking at a timer. It has features that let you monitor your heart rate and rate variability, and personalize your breathing rate.”
Your wearable tells you to recover. Moonbird is how you actually do it.
Slow, guided breathing raises HRV and supports sleep. Moonbird is the easiest way to increase your HRV.
Try for 30 days30-day returnsSyncs with Oura, Apple Health & Google HealthShips in 1 to 2 days
80,000+ customers2.1M+ breathing sessions4.7/5 on Trustpilot30-day money-back guarantee
Stop watching your recovery score.
Start doing something about it.
Another morning like this?
60%
RecoveryLow68
ReadinessBelow baselineResting heart rateUp again
“I collect all the data, but I don’t make any adjustments based on it.”
Eric GT., 39, amateur trail runner
The easiest way to improve your HRV.
01
Slip moonbird in your hand
Hold it in your hand and close your eyes.
02
Breathe with it
Follow the gentle expansion and contraction. It paces your exhale for you.
03
The app reads your HRV
Aura, your AI breathwork coach, tunes the rhythm to what your body responds to.
04
Watch your HRV trend
Over a couple of weeks, your own tracker shows it working.
+0
minutes of additional sleep on nights of use (p = 0.016)
Tested with the Belgian national women’s football team.
Ten elite athletes used moonbird during their preparation for the 2025 European Championships, with sleep tracked on WHOOP 4.0 wearables.
Quasi-experimental study, n = 10, at KU Leuven and UZ Leuven (ethics S70736). Manuscript submitted.
0%
stronger HRV response when breathing at your personal pace versus the standard one.
Breathing at your right pace makes your body respond more.
Most breathing apps use one pace for everyone. Our research shows that about 3 in 4 people respond best at a pace that isn’t the standard 6 breaths per minute. Breathing at your personal breathing pace increases HRV by 18%.
What the data shows.
- 72% of users report feeling better right after a session
- 35 extra minutes of sleep on nights of use, tested with professional athletes
- 3 in 4 people respond best at a pace that isn’t the standard 6 breaths per minute
- Breathing at your personal pace increases HRV by 18%
A neurologist on what slow breathing does.
“Slow breathing impacts and reduces your stress levels.”
Dr. Steven Laureys
Professor of Neurology · Coma Science Group, GIGA-Consciousness, University of Liege
What to expect.
What users notice with regular use. Individual response varies.
Day 1HRV rises during the session
A slower, settled wind-down you can feel in your hands.
Week 1+35 min of sleep on nights of use
Sleep often comes easier after hard or late sessions.
Weeks 2 to 3Your HRV trend turns visible
Watch it climb on your own tracker.
Week 4+37% sleep quality
Subjective sleep quality, in a peer-reviewed one-month trial.
Your wearable is the verdict.
Real-world data from moonbird users shows HRV climbs with regular use. Watch it on the tracker you already trust.
Your whole recovery shelf, in one hand.
Boots, plunges, apps, pills. Most recovery tools are passive, generic, or a recurring cost. moonbird actively guides your nervous system, adapts to your body, and it is yours to keep.
| moonbird + Aura | Compression boots | Cold plunge | Breathwork app | Sleep supplement | |
|---|---|---|---|---|---|
| Actively guides you into recovery | |||||
| Personalized to your body | |||||
| Real-time HRV biofeedback | |||||
| Screen-free | |||||
| Fits in your bag, use it anywhere | |||||
| One-time cost, nothing to refill |
Your tracker becomes the proof.
Connect Oura, Apple Health, or Google Health. Moonbird pulls your data in, so you can watch how regular breathwork shows up in your HRV and sleep trends over weeks.
On Garmin, watch your own HRV and sleep numbers respond on your device.
Choose your moonbird.
About $0.55 a day in the first year.
Color: Soft White
- Handheld device with heart rhythm sensor and tactile breathing guidance
- Biofeedback and insights on every session
- Wearable connection: Oura, Apple Health & Google Health
- Personalized breathing pace tuned to your unique physiologyPremium
- Aura, your AI breathing coach, with real-time guidance and soundscapesPremium
- Advanced insights, including a tonight's-sleep predictionPremium
Delivery in 3-5 business days
30-day trial period100% money-back guaranteeFree shipping, free returns2-year warranty
“The app records HRV, pulse, and I can see in real time the decrease in HR, which corresponds with the reduction in tension that I feel. My sleep has improved dramatically.”
“I fall asleep faster, and my HRV has improved. I verified this myself on my sports watch (Polar) and on clinical measurement equipment, the Elite HRV app.”
“I can really see the difference in the data from my Garmin watch. My heart rate drops, and my stress level drops with it.”
“moonbird helps me bring my stress down, and my HRV values are better, which is ideal for fitness. My sleep quality is better too.”
What the experts say
“I have a Polar watch with ‘serene’ breathing training, but it’s nothing in comparison to what the moonbird will do.”
“I was sceptic at the beginning but was surprised by the intuitive support this small device gives. It really helps me to fall back asleep quickly.”
“I tried deep breathing using my Apple Watch and it just didn’t have any effect. Then I tried the moonbird, and it made all the difference. I wake up feeling rested.”
“You can set your own breathing rate, and then it’s super simple to use. My stress level has dropped a lot.”
“It helps me hold a good breathing pace without counting or following the buzz of a smartphone or smartwatch.”
“The breathing coach set my moonbird to a rhythm that works well for me. I can finally see my HRV slowly rising.”
“If I’m feeling tired but need to head out for an appointment, I’ll do a quick 10-minute session with my Moonbird. It’s amazing how energized and refreshed I feel afterward.”
“I’m glad I finally don’t have to take my phone into the bedroom anymore. The moonbird gives very tactile feedback.”
“I used to use a breathing app, but then you have no idea whether you’re doing it right. Moonbird gives you that feedback.”
“Good guidance without a screen. I used to do exercises with an Apple Watch, but it distracted me too much.”
Questions from athletes.
Moonbird currently syncs directly with Oura, Apple Health, and Google Health, and the data flows both ways (Apple Watch data flows through Apple Health; most Android wearables through Google Health). More integrations, including Garmin, are on our roadmap. Whatever you wear, you can watch your own HRV and sleep numbers respond on your own tracker.
Individual response varies, so we will not promise a date. In real-world data from moonbird users, HRV climbs with regular use over weeks. Give it two to three weeks of consistent sessions and watch the trend on your own tracker. Remember, consistency is key. Daily practice is highly recommended.
Moonbird is a recovery tool. We recommend using it between sessions, in the morning, or before bed. Ideally, sessions last from 2 minutes up to 10 minutes or longer.
Both work. A few focused minutes already help your body settle, and longer sessions let you sink a little deeper. What matters most is coming back to it regularly: consistency beats duration.
That is exactly the gap. Fixed generic pace is why it did not land. Moonbird finds the pace your body responds to.
Yes. Sleep is one outcome, not the whole point. Moonbird is HRV training: use it to settle before a competition, to wind down after an evening session, or to turn your recovery score into a routine. Good sleepers simply start from a better baseline.
Orders ship within 1 to 2 days. Delivery takes 1 to 3 business days in the EU, shipped from our warehouse in Belgium, and 3 to 5 business days elsewhere. Shipping and returns are free.
Then send it back. You have 30 days and a full money-back guarantee, so trying moonbird is risk-free.
Start your journey into breathwork
Less stress, better sleep, more calm. Try moonbird with zero risk: if it doesn't work for you, send it back. No questions asked.
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