5,000+ 5-Star Reviews
Your oxygen can drop anytime. You won't feel it. This will.
For COPD, heart conditions, post-surgery recovery, and anyone told to "keep an eye on your levels."
Instant Safety Alerts
Read From Any Angle
Save on Clinic Bills
Zero Tech Hassle
"I clip it on, blink, and I already have my reading. I check every morning before getting out of bed. Three months, never missed a day."
Verified Review
Dual-Color OLED Display
±2% SpO2 Accuracy
Smart Alarm Alerts
±1 BPM Pulse Accuracy
FDA 510K Cleared
Dual-Color OLED Display
±2% SpO2 Accuracy
Smart Alarm Alerts
±1 BPM Pulse Accuracy
FDA 510K Cleared
Monitor Your Oxygen Levels From Home
"I have COPD. Checking my oxygen used to mean a trip to the clinic. Now I do it in seconds from my couch. It gives me real peace of mind every single day."
Verified Review
"My cardiologist told me to monitor my pulse rate daily after my procedure. This is so simple my wife set it up for me in two minutes. No manual needed."
Verified Review
"I'm a fitness instructor. I use it to track recovery between sets. The display rotates so I can read it from any angle. Genuinely brilliant little device."
Verified Review
Why Most People Miss The Warning Signs
When blood oxygen starts to fall, you don't feel breathless straight away. You feel tired, a little foggy.
By the time breathlessness hits, your SpO₂ may already be in a dangerous range. And the reading your doctor takes in a warm waiting room tells almost nothing about what's happening at night, during activity, or hours after a hard day.
Normal SpO₂ is 95–100%. Below 90% needs urgent attention.
1 in 4 COPD patients have unnoticed overnight oxygen drops.
One clinic reading shows 1%. 30 days of home readings provide your doctor the info to adjust your care.
Every Detail Built for Real People
No medical degree required. No fumbling with apps or cables. Just clip on, press start, and read.
Smart Alarm Alerts
The alarm triggers the moment your SpO₂ or pulse rate moves outside safe range, day or night, before you ever feel it. For anyone managing COPD, sleep apnea, heart conditions, or post-surgical recovery, this is the feature that changes everything.
"Without this alarm I'd have gone months not knowing I had sleep apnea. It found something my GP hadn't flagged in three years of checkups."
Verified Buyer
Dual-Color OLED · 6 Display Modes
SpO₂ in teal. Pulse rate in amber. A live waveform so you can see the reading quality, not just the number. Six orientations means it's legible lying down, sitting up, or clipped to a lanyard, a detail that matters at 2am.
"I have macular degeneration. I can read this screen from across the room without squinting. My daughter nearly cried when she saw how clearly I could read it."
Verified Buyer
Clinical-Grade Accuracy
±2% SpO₂ accuracy in the clinical range. ±1 BPM pulse rate. The same specification standard as hospital-grade devices. When you log 30 days at home and walk in with the numbers, your doctor stops guessing and starts adjusting.
"She compared it to the clinic device. Within 1%. She adjusted my treatment based on overnight trend data, something she'd never been able to do before."
Verified Buyer
30g (1.06oz) · No App · Auto Power-Off
No app. No Bluetooth. No charging cable. Batteries pre-installed. Clip on, press start, done in 8 seconds. Auto power-off means batteries last months. At just 30g it clips to a lanyard and goes everywhere you do.
"He still writes phone numbers in a book. He clips this on every morning without help, reads the number, calls me. One button. I don't know how I managed the worry before."
Verified Buyer
Clinical Monitoring. Without the Clinic Bill.
90 day money back guarantee
Experience the Herz P1 Smart Oximeter, trusted by thousands of satisfied customers. If you're not completely satisfied, our friendly support team offers a hassle-free, no-questions-asked return process.
What's In The Box
Ready to Use Out of the Box
No apps. No Bluetooth. No setup wizard. Open the box, clip it on, and press start. First reading in under 8 seconds.
- Dual-Color OLED · 6 Display Modes: SpO₂, pulse rate, waveform, and battery status — all at once, in any orientation.
- Smart Alarm Alerts: Triggers immediately when levels move outside safe range, including while you sleep.
- Auto Power-Off after 8 Seconds: Protects battery life so it's always ready when you need it.
- Batteries Pre-Installed: 2× 1.5V AAA alkaline — ready the moment the box is opened.
Monitoring in Under 8 Seconds
Clip It On
Place the Herz P1 on your index or middle finger. The soft clip is gentle and comfortable: no squeezing, no pain, no fumbling.
Press Start
One button. The device reads your SpO₂, pulse rate, and waveform in under 8 seconds. If levels are outside your safe range, the alarm triggers immediately.
Read & Note
Your reading displays clearly on the OLED screen. Log it morning and evening. After 30 days, you walk into your appointment with something your doctor can actually use.
What Our Customers Are Saying
Based on reviews from
5,000+ customers
Posted Today
Alarm at 2am. No symptoms. SpO₂ read 88%. Called my GP first thing. Sleep study ordered. Obstructive sleep apnea diagnosed. Zero symptoms throughout. Six weeks after getting this device, it found something my GP had missed for years.
Posted Today
Brought 45 days of morning and evening readings to my pulmonologist. She spent the first ten minutes going through them. Said it was the most complete home oxygen picture she'd seen from a patient in years. Adjusted my treatment based on the overnight trend — first change in three years of appointments.
Posted Yesterday
Two months. Not one missed morning reading. The alarm has triggered twice. Both times I'm very glad I knew. Every other oximeter I tried before was fiddly or had a screen too small to read without my glasses. This one I actually use.
Posted Yesterday
Had a pulmonary embolism last year. Now on anticoagulants. Wear it on a lanyard. When I feel off, I check. That reassurance has reduced my anxiety more than anything else I've tried. My cardiologist was the one who suggested it after seeing how consistently I logged.
Posted Yesterday
Cardiac ablation earlier this year. Care team said monitor daily for three months. Alarm flagged two overnight episodes before my follow-up visit. Consultant was pleased I'd flagged them early, said catching them at the review instead would have been a different conversation entirely.
Posted Last Week
Father, 79. Lives alone. Has CHF. Doesn't do technology, he still writes phone numbers in a book. I set this up in two minutes. He clips it on every morning without help, reads the number, calls me. I cannot overstate how much peace of mind this has given our whole family.
Posted Last Week
I am 71 and my eyesight is not what it was. Every other monitor required me to squint or use a magnifying glass. The OLED on this I can read from across the room, in any light, in any position. A small detail that makes a significant difference every single day.
Posted Last Week
Random breathlessness after COVID. No obvious trigger. GP couldn't reproduce it at appointments. Three months of daily readings gave her a clear pattern, consistent afternoon dips. That data was more useful than anything we'd managed to figure out in six months of trying.
5,000+ 5-Star Reviews
Order Now Before This Special Deal Expires
Join thousands of people with COPD, heart conditions, sleep disorders, and post-surgical recoveries who now know their oxygen levels every single day.
Delivered in 2-3 business days
90-Day Money-Back Guarantee
Expert Support Team on Standby
Frequently asked questions
±2% SpO₂ in the clinical range (80–99%) and ±1 BPM pulse rate — the same specification as clinical-grade devices. Multiple customers have had their doctors compare readings side-by-side and confirm the accuracy directly.
The alarm triggers when your SpO₂ drops below 90% or your pulse rate goes outside the normal range. You can customize these thresholds based on your doctor's recommendations.
Absolutely. There's no app, no Bluetooth pairing, no setup wizard. Just clip it on and press the single button. The large OLED display shows results clearly, and it works in any orientation.
No. The Herz P1 is completely standalone. No app required, no phone needed, no subscription fees ever. Just the device and batteries (pre-installed).
Simply write down your readings in a notebook or use any notes app on your phone. After 30 days of morning and evening readings, you'll have valuable trend data your doctor can use to adjust your care.
With the auto power-off feature (8 seconds after each reading), the included AAA batteries typically last several months of daily use. Replacement batteries are standard AAA alkaline.
Yes. The soft clip opens easily, the single button is large and easy to press, and the display rotates to any orientation. Many customers buy it specifically for elderly parents who struggle with technology.
We ship from our US warehouse. Most orders arrive within 2-3 business days. You'll receive tracking information as soon as your order ships.
We offer a 90-day money-back guarantee. If you're not completely satisfied for any reason, our friendly support team will process a hassle-free return with no questions asked.