9 Best Pulse Oximeters of 2026

The Nonin TruO2 OTC takes the top spot because accuracy is the whole point of a pulse oximeter, and Nonin documents more about it than any other brand here. Nonin says the Model 3250 is cleared by the FDA for over-the-counter use and delivers accurate readings across all skin tones and for people with low perfusion, citing a 2024 EBioMedicine study that found many fingertip oximeters perform poorly on darker skin. It uses Nonin's PureSAT processing, a CorrectCheck warning when the finger is misplaced, and a SmartPoint algorithm that decides when a reading is good enough to send over Bluetooth. Readings go to Apple Health or out by email through the NoninConnect app, and two AAA batteries last up to 2,200 spot checks. The trade-offs are the $299.00 price, an app that is listed for iOS only, and no overnight logging, so people tracking sleep should look at the Wellue O2Ring.

The Wellue O2Ring is the pick for anyone who wants to know what happens to their oxygen level while they sleep. Instead of a clip, it is a ring sensor that Wellue says stays on during the night, powers on when worn, and logs oxygen, pulse and motion for up to 16 hours per charge. If readings cross thresholds you set, it vibrates on your finger at one of 5 strengths, and the phone can sound an alert when connected. The free app and PC or Mac software show oxygen drops and time spent low and export PDF or CSV reports, with no subscription. That makes it a common companion for CPAP users, who Wellue says can spot mask leaks from brief drops. The limits: Wellue labels it a general wellness device not intended for medical use, the original model charges over Micro-USB, and at $159.00 it costs far more than a basic spot checker.

The iHealth Air is the best value if you want your readings on a phone. For $39.99 on sale it pairs over Bluetooth with the free iHealth MyVitals app, which records several users and charts SpO2 and pulse trends by hour, day, week and year. The app also shows a live plethysmograph and perfusion index, which iHealth says help confirm that a reading is stable. Unlike every battery-powered clip on this list, the Air has a built-in rechargeable battery that takes about 3 hours to charge and lasts up to 300 uses. iHealth lists an SpO2 measuring range of 70 to 99% with plus or minus 2% accuracy and a pulse range of 30 to 250 bpm. It is a spot-check device, so iHealth advises using it before or after exercise while still, and it does not log overnight like the Wellue O2Ring.

The Beurer PO60 is the cheapest way on this list to get readings onto a phone. For $29.99 on Beurer's US store, it measures SpO2, pulse rate and pulse strength on a color OLED screen with 4 viewing options, then sends results over Bluetooth Smart to the Beurer HealthManager Pro app for tracking and sharing. That app also handles Beurer's blood pressure monitors and scales, so it suits households already using the brand. Operation is one touch with automatic shut-off, and a lanyard and storage bag come in the box. The product page is thin on specifications: it does not state an accuracy range, and the device itself keeps only the last reading, so history lives in the app. Beurer's other adult models, the PO30 and PO50, showed as sold out when we checked.

The Wellue Checkme O2 Max is the long-running alternative to the O2Ring. A small unit sits on the wrist and connects to a ring sensor on the finger, which Wellue says stays put at night without the numbness a duckbill clip can cause. The headline spec is battery life: up to 72 hours per charge, which Wellue frames as 7 full nights of tracking, with a 2.5 hour recharge. It logs oxygen, pulse and motion every second, beeps and vibrates when readings cross your thresholds, and stores 4 sessions of up to 10 hours. The free app works with Apple Health and Fitbit, and full reports can be printed or shared without a fee. Wellue lists SpO2 accuracy of plus or minus 2% from 80 to 100% and plus or minus 3% from 70 to 79%. At $183.99 on sale it costs $24.99 more than the O2Ring, and the wrist band adds bulk.

The Zacurate 500C Elite adds the features a caregiver tends to want on top of the brand's basic 500DL. Zacurate lists an auditory alarm when SpO2 and pulse rate move beyond set limits, a beep for each detected pulse, a perfusion index and a plethysmograph waveform, all on a rotatable OLED screen with six display directions and adjustable brightness. The display range is 35 to 100%, with plus or minus 2% accuracy between 70 and 100%. The finger chamber is hypoallergenic, latex-free silicone, and the battery cover snaps off. It has no Bluetooth, so there is no history beyond what you write down, and it runs on AAA batteries. At $36.99 it costs almost as much as the iHealth Air, so the choice comes down to alarms on the device versus trends in an app.

The Zacurate 500DL Pro Series is the budget pick for anyone who just wants a number now and then. It costs $19.99 on Zacurate's own store, and Zacurate says it measures SpO2 and pulse rate within 10 seconds with plus or minus 2% accuracy between 70% and 99%. The Pro Series version reads up to 100% and has an LED screen that faces the user. A spring-loaded silicone finger chamber is hypoallergenic and latex-free, and the box includes 2 AAA batteries, a lanyard and a silicone cover. Zacurate backs it with a 1 year warranty and USA-based phone support and sells it with quantity discounts. What you give up is everything beyond the two numbers: no app, no waveform, no alarm, and Zacurate lists it for ages 12 and up. For an alarm and waveform, the 500C Elite costs $36.99.

The Santamedical Generation 2 is a low-cost OLED clip for sports and aviation. For $24.95 on Santamedical's own store you get a bright OLED display with SpO2, pulse rate and a pulse bar, readable in four directions across 6 layouts, plus a self-adjusting clamp and one-button use. Santamedical says it runs for 30+ hours of continuous monitoring on 2 AAA batteries and turns itself off after 10 seconds, and it ships with batteries, a neck or wrist cord, a 1-year warranty and a money-back guarantee. Two things hold it back. Santamedical states the device is for sports and aviation use only, and the page does not publish an accuracy figure. The brand also notes that studies show readings can appear higher than true oxygen levels for people with darker skin, which applies to most fingertip oximeters and is why the Nonin TruO2 OTC ranks first here.

The Innovo iP900AP Deluxe is a feature-rich fingertip clip with one gap in our data. Innovo says the model is FDA Cleared and lists an OLED screen with six display orientations, a plethysmograph waveform, a perfusion index, an auditory alarm, pulse beeps and adjustable brightness, and its FAQ confirms that alarm settings stay saved once set. It comes with 2 AAA batteries and a lanyard, and Innovo offers $4 off with its carrying case. On paper it matches the Zacurate 500C Elite feature for feature and adds the FDA clearance claim. We could not confirm a USD price, because Innovo's store showed prices in Polish zloty from our location, so it ranks last on value until that check is done. The Premium iP900BP, which drops the alarm, was sold out. Like other clips here, it has no app or Bluetooth, and Innovo says to stay still while it measures.