Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstalliTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
A Fitbit can monitor pulse signals and, on compatible devices, notify you about patterns that may suggest atrial fibrillation (AFib). That is not the same as diagnosing a heart condition. The FDA-reviewed features described here monitor or flag signals; the available evidence does not establish that wearing a Fitbit itself damages or improves your heart.
Can Fitbit affect your heart?
The evidence described by the U.S. Food and Drug Administration (FDA) concerns what Fitbit features measure and how their alerts may affect follow-up care—not a direct physical effect from wearing the device. An alert may prompt a conversation with a health professional or further testing. The FDA also notes that false notifications can lead to additional tests or medication. Its post-market evaluation project aims to examine real-world follow-up, testing, treatment, and subsequent diagnoses using patient records from Stanford Health Care and the Veterans Health Administration; the project description is not completed evidence of a rate of benefit or harm. FDA: Post-Market Evaluation of Smartwatch Cardiovascular Notifications
Can Fitbit detect heart problems?
Some compatible Fitbit devices offer heart-related software features, but each has a different purpose. An irregular-rhythm notification looks for pulse patterns suggestive of AFib; the Fitbit ECG App is a separate electrocardiograph software product; and Loss of Pulse Detection is intended to identify possible loss-of-pulse events. None should be treated as a general test that can identify or exclude every heart problem.
| Feature | Signal and how it works | What the FDA record says about use |
|---|---|---|
| Irregular Rhythm Notifications | Photoplethysmography (PPG) sensors detect changes in blood flow and derive pulse-rate data. Software analyzes the data for rhythms suggestive of AFib. | For compatible wrist-worn products. Data are captured while the user is still, and notifications are issued opportunistically when sufficient data are available—not for every episode. Intended to supplement screening decisions, not replace diagnosis or treatment. FDA 510(k) summary, K212372 |
| Fitbit ECG App | A separate electrocardiograph software product; it is not the same feature as passive pulse-rate monitoring. | The FDA database records a substantially equivalent decision dated September 11, 2020. That record does not establish that every Fitbit model has the app or that it is available in every country. FDA database record, K200948 |
| Loss of Pulse Detection | Software for compatible wrist-worn products intended to identify possible loss-of-pulse events. | The February 25, 2025 FDA decision summary says data are captured while the user is still and notifications are opportunistic. If the user does not respond, the system may attempt to prompt a call to emergency services through connected compatible hardware. It is not intended to replace diagnosis or treatment. FDA summary, K242967 |
These are separate functions, and a filing for one does not establish that another is present on a particular device. The reviewed FDA records describe use with compatible products but do not provide a current model-by-model or country-by-country compatibility list.
#1 Best Overall
- 【Superb Visual Experience & Effortless Operation】Diving into the latest 1.58'' ultra high resolution display technology, every interaction on the fitness watch is a visual delight with vibrant colors and crisp clarity. Its always on display clock makes the time conveniently visible. Experience convenience like never before with the intuitive full touch controls and the side button, switch between apps, and customize settings with seamless precision.
- 【Comprehensive 24/7 Health Monitoring】The fitness watches for women and men packs 24/7 heart rate, 24/7 blood pressure and blood oxygen monitors. You could check those real-time health metrics anytime, anywhere on your wrist and view the data record in the App. The heart rate monitor watch also tracks different sleep stages for light and deep sleep,and the time when you wake up, helps you to get a better understanding of your sleep quality.
- 【120+ exercise modes & All-Day Activity Tracking】There are more than 120 exercise modes available in the activity trackers and smartwatches, covering almost all daily sports activities you can imagine, gives you new ways to train and advanced metrics for more information about your workout performance. The all-day activity tracking feature monitors your steps, distance, and calories burned all the day, so you can see how much progress you've made towards your fitness goals.
- 【Messages & Incoming Calls Notification】With this smart watch fitness trackers for iPhone and android phones, you can receive notifications for incoming calls and read messages directly from your wrist without taking out your phone. Never miss a beat, stay in touch with loved ones, and stay informed of important updates wherever you are.
- 【Essential Assistant for Daily Life】The fitness watches for women and men provide you with more features including drinking water and sedentary reminder, women's menstrual period reminder, breath training, real-time weather display, remote camera shooting, music control,timer, stopwatch, finding phone, alarm clock, making it a considerate life assistant. With the GPS connectivity, you could get a map of your workout route in the app for outdoor activity by connecting to your phone GPS.
Can a Fitbit detect AFib?
Irregular Rhythm Notifications analyze wrist-derived pulse data for patterns that may suggest AFib. The FDA filing describes data capture while the wearer is still and notification when enough data are available. The feature does not alert on every possible episode, so it is a screening aid rather than a continuous guarantee that AFib will be caught.
In the clinical summary for the FDA-reviewed feature, the reported positive predictive value (PPV) was 98.2% among 225 subjects who received a positive algorithm detection while wearing an ECG patch. In the described study, participants were screened from Fitbit’s U.S. population; eligible subjects wore both a Fitbit and an ECG patch for seven consecutive days and nights. This result applies to that selected group and protocol. It is not a promise of accuracy for every wearer, and it does not measure how often the feature catches all AFib episodes across all users. FDA 510(k) summary, K212372
Rank #2
- Google Fitbit Air is the unbelievably comfortable, exceptionally smart way to transform your health[1]; and Google Health brings together effortless tracking and adaptive coaching to help make the most of your everyday[2]
- Unlock more with Google Health Premium: With a premium membership, get personalized coaching that’s built with Gemini and adapts to your life[2]; get a 3-month trial at no cost to you[5] (Google Health Premium subscription sold separately)
- Comfortable fit - One Size Tracker (130-210 mm): The lightweight, micro-adjustable fit sits comfortably and quietly, so you can wear Google Fitbit Air through work, play, and sleep; advanced sensors and new algorithms power more accurate, precise health tracking, 24/7[1]
- Designed for every occasion: With no screen to distract you or disrupt your style, your tracker moves seamlessly from bracelet to workout band to sleep band, and you can change looks in seconds – just press the pebble in, click, and go
- Long battery life: Google Fitbit Air’s battery lasts up to a week, and fast charging gets you one day of battery life in just five minutes[6,7]
Can a Fitbit rule out AFib?
No. The FDA indication says the feature is not intended to notify on every episode, and the absence of a notification is not intended to indicate that no disease process is present. It has not been tested for or intended for people under 22 or people previously diagnosed with AFib. A quiet Fitbit reading cannot establish that you do not have AFib or another heart condition. FDA 510(k) summary, K212372
Free tools Windows power users keep installed
One-click scans. No signup required.
Is a Fitbit ECG the same as heart-rate monitoring?
No. Heart-rate monitoring estimates pulse rate; the irregular-rhythm feature analyzes PPG-derived pulse data for patterns suggestive of AFib. The Fitbit ECG App is a distinct electrocardiograph software product. Their signal types and intended uses differ, and an FDA record for the ECG App is not evidence that it is available on every Fitbit or in every region. Check the device and country-specific availability information from Fitbit before relying on a feature.
Rank #3
- Learn to manage stress, sleep better and live healthier with Sense 2 – an advanced health and fitness smartwatch
- Manage stress and live healthier: All-day stress detection with cEDA and daily Stress Management Score, ECG app for atrial fibrillation assessment[1], irregular heart rhythm notifications[2], SpO2[3], health metrics dashboard[4], mindfulness content
- Measure and improve sleep quality: Daily sleep stages and Sleep Score, smart wake alarm and do not disturb mode
- Enhance activity: Built-in GPS and workout intensity map, Daily Readiness Score, Active Zone Minutes, all-day activity tracking and 24/7 heart rate, 40+ exercise modes and automatic exercise tracking, water resistant to 50 meters
- Designed for all-day wear: On-wrist Bluetooth calls, texts and phone notifications[5], customizable clock faces, Amazon Alexa built-in[6], Google Wallet & Maps, 6+ day battery[7]
How should you respond to a Fitbit heart notification?
Use an alert as a reason to discuss appropriate evaluation with a health professional, rather than as a diagnosis. False notifications can lead to unnecessary follow-up, while a missed alert cannot rule out a condition. If you have symptoms or concerns, do not wait for a Fitbit notification or use its absence to decide whether to seek care; the FDA materials cited here do not provide a symptom triage protocol.
Quick Recap
Best Value
- Inspire 3 is the tracker that helps you find your energy, do what you love and feel your best – all you have to do is wear it;
- Compatible with Apple iOS 16.4 or higher and Android OS 11.0 or higher
- Move more: Stay motivated with a Daily Readiness Score, Active Zone Minutes, all-day activity tracking and 24/7 heart rate, 40+ exercise modes, automatic exercise tracking, and reminders to move
- Stress less: Keep an eye on your well-being with a daily Stress Management Score, mindfulness sessions, relax breathing sessions, irregular heart rhythm notifications, SpO2, menstrual health tracking, resting heart rate, and more[1,2]
- Sleep better: Automatic sleep tracking, a daily detailed Sleep Score, smart wake vibrating alarm, and sleep mode help you improve your sleep quality[3]
Rank #4
- Get inspired and stay accountable with Versa 4 + Premium - learn when to work out or recover, see real-time stats during exercise and find new ways to keep your routine fresh and fun.Operating temperature: -14° to 113°F. Radio transceiver: Bluetooth 5.0.Maximum operating altitude : 28,000 feet (8,534 m).
- Built for better fitness results: Daily Readiness Score(1), built-in GPS and workout intensity map, Active Zone Minutes, all-day activity tracking and 24/7 heart rate, 40+ exercise modes and automatic exercise tracking, water resistant to 50 meters
- Tools to measure and improve sleep quality: personalized Sleep Profile(1), daily sleep stages & Sleep Score, smart wake alarm and do not disturb mode. Compatibility-Apple iOS 15 or higher, Android OS 9 or higher
- Maintain a healthy body and mind: daily Stress Management Score, reflection logging, SpO2(2), health metrics dashboard(3), guided breathing sessions, menstrual health tracking and mindfulness content
- Designed for fitness & beyond: on-wrist Bluetooth calls, texts and phone notifications(4), customizable clock faces, Fitbit Pay(5), Amazon Alexa built-in(6), Google Wallet & Maps (Google Maps Android only, coming Spring 2023 to iOS), 6+ day battery(7)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
