Trending February 2024 # How To Measure Heart Rate Variability (Hrv) On Apple Watch # Suggested March 2024 # Top 6 Popular

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Things to know before measuring HRV on your Apple Watch in watchOS 9:

HRV is supported by Apple Watch Series 4 and later

The user must be 18 years and older

Measuring your Heart Rate Variability using the Apple Watch can provide crucial insights concerning your heart rate and well-being. HRV is an important indicator of your autonomic nervous system (ANS) – the part of your nervous system that controls functions like breathing, heart rate, and digestion.

By tracking this critical metric, it is possible to detect changes in your body’s stress levels and diagnose changes in health or energy. In this guide, I’ll give insights on tracking your HRV levels from Apple Watch.

Why is Heart Rate Variability important?

Heart Rate Variability (HRV) is a term used to describe the variation in time between each heartbeat. The measurement of HRV has become a popular way to track overall health and wellness, and the Apple Watch is one device that can help you do so.

HRV can also be used as a way to measure progress when it comes to exercise and physical fitness. Training with a heart rate monitor can help athletes track their progress and reach their goals. It can help inform decisions about the intensity and duration of exercise, as well as help identify signs of fatigue and overtraining.

It can also detect changes in the body’s response to stress and physical strain, leading to more accurate diagnosis and treatment of medical conditions.

Overall, HRV is a valuable tool for assessing overall health and fitness, detecting changes in response to stress, and monitoring progress in physical fitness.

How to monitor your heart rate variability on Apple Watch

    Before you start the breathing exercise, make yourself comfortable and relax thoroughly.

    Access the Mindfulness app from your Apple Watch.

    Follow instructions as displayed. You will see options to inhale and exhale.

    The following interface will reveal your heart rate in Beats Per Minute (BPM) correspondingly.

    The timer for this exercise will be set for 1 minute by default. However, you can change it by tapping the three dots icon opposite the breathe logo→ Duration→ Set your timer accordingly.

    Note: All the notifications will be muted on your Apple Watch once the session starts to help you concentrate. If you go out of your way to receive incoming calls or make sudden movements, your session will automatically end, and you’ll have to start the process again.

    How to view HRV readings on iPhone

    If you want a detailed representation of your heartbeat reading, you can get it from your iPhone by adhering to a few simple steps:

      Open the Health app on your iPhone.

      Tap the Browse option located on the bottom-right corner of the screen.

      Select the Heart option under Health Categories.

      Now, you can view detailed infographics of your heart status. The readings are categorized into Days, Weeks, Months, 6 months, and years.

      Following these steps, you can easily record and manage multiple heart readings at the same time without having to worry about losing data from any spontaneous session.

      Factors that affect HRV measurement accuracy

      The relationship between heart rate and respiration is the measurement of heart rate variability authorized to provide valuable insight into many health aspects. However, several factors can affect the accuracy of HRV measurements:

      To ensure accurate readings, it’s best to perform the measurement in a quiet, comfortable room with minimal external noise and an ideal temperature.

      Any movements such as eating, drinking, or smoking before or during the measurement can also affect the accuracy of the HRV measurement.

      It’s best to measure HRV with a continuous recording over several minutes. This will give a better average and provide a more accurate picture of the overall HRV.

      A good HRV is important because it goes hand-in-hand with better overall health. It can be used to measure stress levels and can help with exercise recovery and performance. On the contrary, a low HRV has been associated with an elevated risk of heart disease and other health problems. 


      How to turn on the heart rate monitor on Apple Watch? 

      To enable heart rate measurements in Apple Watch, open the Settings app on your watch, and select Privacy→ Heart Rate. Make sure that Heart Rate is turned on.

      Does Apple Watch accurately measure HRV?

      Yes, the apple watch is capable of accurately measuring HRV using its built-in heart rate sensors and various health monitoring features like zone tracking. Nonetheless, it’s important to note that Apple Watch is not medical equipment and should not be relied on for high-end diagnoses or treatment. Any concerns should be discussed with a medical professional.

      It’s that simple!!! 

      The Apple Watch’s built-in heart rate monitor and the health app on iPhone make it very easy for you to keep account of your heart readings. It is important to remember to take frequent readings and to consult a doctor if you are concerned about your heart health.

      With regular monitoring of your HRV, you can make sure that your body is functioning at its optimal level. Follow our guide for more such Apple Watch tips and tricks.

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      What Is Respiratory Rate On Apple Watch And How To Use It?

      The WWDC 2023 keynote is done and dusted, and alongside updates like iOS 15 and macOS 12 Monterey, Apple has also unveiled watchOS 8 for the Apple Watch with new portrait watch faces, mindful app updates, and more. One of the most useful features added in watchOS 8 is the new sleeping respiratory rate tracking on Apple Watch. So, if you are itching to know more about it, we have explained what is sleeping respiratory rate on Apple Watch and how to use it in this article.

      Apple Watch Respiratory Rate Tracking

      If you are an Apple Watch user, chances are you have been using Apple Watch for sleep tracking already. And it’s pretty good at it. Moreover, you can track your blood oxygen levels, sleep time, and more when you wake up with Apple Watch. Now, you also get respiratory tracking while you sleep. In this article, we will take a look at what exactly is respiratory tracking, how respiratory tracking is different from SpO2 monitoring, how to use it, and more.

      As always, you can use the table of contents to jump between sections as you like.

      What is Respiratory Rate on Apple Watch?

      Before we go into any of the details about how to use the feature, let’s first get a basic understanding of what respiratory rate tracking on the Apple Watch means. Right now, with watchOS 7, your Apple Watch keeps track of things like your heart rate, blood oxygen level, and time asleep during bedtime.

      With watchOS 8, all compatible Apple Watches will also be able to keep track of your sleeping respiratory rate. Your sleeping respiratory rate is essentially the number of breaths you are taking per minute while asleep. This number is typically higher when your body requires more oxygen, such as while exercising, and lower when you are resting, especially while you are asleep.

      How is Respiratory Rate Different from SpO2?

      At this point, you may be wondering what the difference is between SpO2 values that the Apple Watch Series 6 can track and this new sleeping respiratory rate on Apple Watch. To put it in simple terms, SpO2 is a measurement of concentration, while respiratory rate is a measure of, well, the rate at which you breathe. Here’s what this means.

      SpO2 values shown by your Apple Watch describe the saturation (or concentration) of oxygen in your blood. A higher value is better because that means your blood is more efficiently able to transport oxygen to your muscles and organs. A lower value, especially if it’s too low, is usually a mark of a medical issue, and we recommend that you visit a doctor to understand what may be wrong.

      On the other hand, the respiratory rate shown by your Apple Watch is simply the number of breaths you take per minute. On average, an adult takes somewhere between 12-20 breaths per minute when awake but not exerting themselves. This number goes higher when you are exercising and usually goes lower while you are asleep.

      How to Use Sleeping Respiratory Rate Tracking on Apple Watch?

      Make sure you have sleep tracking enabled on your Apple Watch. If you don’t, you can check out our article on how to enable sleep detection on Apple Watch.

      You will also need to update your iPhone to iOS 15 and update Apple Watch to watchOS 8 to get the feature. By the way, if you are not a developer, you can still update iPhone to iOS 15 without a developer account as well.

      Now, you just need to ensure that you are wearing your Apple Watch to sleep, and it will start tracking your sleep respiratory rate.

      How to Check Sleeping Respiratory Rate?

      So we have started tracking our sleeping respiratory rate, but how to see your data? Well, you can do that in the Health app on your iPhone. Just follow the steps below.

      Open the Health app on your iPhone and tap “Browse” on the bottom navigation bar.

      Tap on “Respiratory” under Health Categories, followed by “Respiratory Rate” to see your sleeping respiratory rate data.

      What are the Benefits of Sleeping Respiratory Rate Tracking?

      Now that we know what is sleeping respiratory rate and how to use it, let’s take a look at what benefits it offers us. After all, there has to be a reason to use the feature, right?

      However, if your sleeping respiratory rate is higher than normal while you are asleep, it could point to unhealthy lungs. On the other hand, sleep apnoea can result in your breathing at night to stop and start abruptly and repeatedly throughout the night. So keeping track of your sleep respiratory rate can help you ensure that your lungs are healthy.

      Keeping track of sleeping respiratory rate on Apple Watch in watchOS 8 can help ensure your lungs are healthy

      Plus, since our breathing slows down to deeper breaths at highly regular intervals during deep sleep, and speeds up to shallow, less regular breaths during REM cycles, sleeping respiratory rate tracking can help you identify how much REM sleep and deep sleep you’re getting as well.

      Use Respiratory Rate Tracking on Apple Watch

      How To Increase The Text Size On Your Apple Watch

      Apple’s smartwatch comes in two sizes for an increased chance of it fitting on your wrist. However, when it comes to the screen’s readability, there aren’t any differences between the 40mm and 44mm variants that are currently available. Therefore, if you want to increase the text size on your Apple Watch, you need to turn to its software customization.

      At the moment (if your smartwatch and your smartphone run the latest software version), you have two methods to increase the text size on your Apple Watch. We cover both of those methods, which are equally quick and straightforward, below. 

      Increase the Text Size on an Apple Watch Using an iPhone

      The Watch app on your iPhone manages pretty much every single aspect of your smartwatch. Therefore, it doesn’t come as a surprise that you can use it to adjust the text size as well. Here’s how that is done.

      1. Open the Watch app on your smartphone. Make sure to select the “My Watch” tab and ensure that the correct Apple Watch is set. (You should see your watch’s name at the top).

      2. Then, scroll down until you see the “Display & Brightness” group of settings. Tap to enter this group of settings.

      3. At this moment, you should see a couple of sliders. Pay attention to the one next to “Text Size.” This is where you can increase or decrease the text size on your Apple Watch with six levels available. By default, the text size on your Apple Watch will be on the fourth level, which gives you space to make things bigger. Adjust the slider as you see fit.

      4. Just below the “Text Size” slider, you will see the option to make the text on your Apple Watch bold. We have to note that enabling this slider has a dramatic effect, making it very useful if you’re having a hard time navigating your smartwatch. 

      That’s it! There’s no need to save or apply any of your changes, as the Watch app will do that for you. Exit the Watch app on your iPhone, and you should see your changes reflected on your Apple Watch.

      Increase the Text Size via the Watch Itself

      Aside from doing so using your iPhone, you can make the changes directly on your Apple Watch. Go through the following steps.

      1. Press the “Digital Crown” on your Apple Watch to access its main menu. You should see an array of icons leading to individual apps. Tap on “Settings.”

      2. Use your finger or the Digital Crown to scroll down until you see “Display & Brightness.” Tap on this group of customizations to reveal what hides behind.

      3. Scroll just a bit down and tap on “Text Size.” You will see a green bar that allows you to choose from six different levels of text size.

      4. Feel free to use the “Digital Crown” or the “Aa” virtual buttons to change your Apple Watch’s text size. Once you’re happy with your selection, tap on the arrow button in the top-left corner to go back one step in the Settings app.

      5. We also recommend checking whether making the text bolder could make a difference. (It usually does.) You can find this option just below the “Text Size” button. It comes as a simple ON/OFF switch, and you can preview the results immediately.

      That’s it! You are now free to exit the Settings app (done by pressing the Digital Crown) and return to your main watch face. Feel free to take a look around your Apple Watch and see whether you need to readjust its text size a bit more.


      Now that you’ve learned how to increase the text size on your Apple Watch, if you’d like to learn a couple more things, here are you some recommendations. First, check out our beginner’s guide to navigating your Apple Watch. Then, follow it with how to change your move, exercise, and stand goals on your smartwatch. 

      Isaac Norman

      Isaac is a freelance writer with over a decade of experience covering the latest technological innovations. Mainly focused on Apple-related software and hardware systems, his aspiration is to explore all the ways today’s digital world intertwines with our everyday life.

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      How To Set Up Emergency Medical Id On Iphone And Apple Watch

      Everyone should know how to set up the emergency Medical ID on iPhone as it can potentially save your life. This feature stores essential health information about you that first responders and others can use during emergencies such as an accident.

      It includes your emergency contacts and can be viewed even when your phone is locked. Further, it can be linked to your Apple Watch too. Here’s everything you need to know to create and share your Medical ID on your iPhone and Apple Watch. Let’s start with the basics.

      What is Medical ID on iPhone? 

      Your Medical ID on the iPhone or Apple Watch stores medical details about you that can be useful in emergencies. The details include:  

      Name, date of birth, and Apple ID photo

      Medical conditions, such as diabetes, hypertension, or asthma

      Medications you are currently on

      Medical notes such as if you have a pacemaker in your heart

      Allergies and reactions

      Blood type

      Organ donor status

      Height and weight

      Primary language

      Emergency contacts and their phone numbers

      How to create an emergency Medical ID on iPhone

      Open the Health app and stay on the Summary tab. 

      If you have previously set up a Medical ID and want to update it, tap Edit in the upper-right corner.

      Enter the relevant information like your date of birth, allergies, blood type, etc.  

      To make your Medical ID available from your iPhone Lock screen, toggle on Show When Locked. This can enable others to see it during an emergency. 

      Note: If you’re in the United States, you can also turn on Share During Emergency Call. This will share your Medical ID with emergency responders through Emergency SOS.

      How to set up Medical ID on an Apple Watch

      After setting up your Medical ID on your iPhone, it’s essential to add it to your Apple Watch if you use one. Many first responders are trained to look for medical bracelets when attending to patients in an emergency.

      This means your Apple Watch is more likely to be checked in an emergency than your iPhone. So, follow these steps to add your Medical ID to Apple Watch. 

      Open the Watch app on your iPhone

      Go to My Watch → Health → Medical ID.

      Make sure all the details are accurate and enable the option to Show When Locked.

      Along with your Medical ID, it’s vital to set up emergency contacts on your iPhone. They will be notified when using the Emergency SOS on your iPhone or Apple Watch. Here’s how to add or edit your emergency contacts: 

      Open iPhone’s Health app and go to the Summary tab. 

      Tap your profile photo at the top-right and select Medical ID.

      Tap Add Emergency Contact. 

      To delete an emergency contact, tap the red minus symbol.

      You can access medical ID from the lock screen of an iPhone or Apple Watch, provided that the Show When Locked feature was enabled when setting it up. Let’s see how to view it.

      How to view someone’s Medical ID

      On iPhone

      When iPhone is locked:

      At the bottom left, tap Emergency → Medical ID.

      If the iPhone is unlocked:

      Open the Health app → tap the profile picture → tap Medical ID.

      If you need to call emergency services, hold down the Side button with either Volume button, then slide across on the Emergency SOS option. Or repeatedly press the Side button or the Sleep/Wake button five times.

      This activates Emergency SOS and will call the emergency services in your country.

      When you complete the call, the iPhone will send a message to emergency contacts and show the Medical ID.

      On Apple Watch 

      Long-press the Side button, then slide over the Medical ID option.

      To call emergency services, long-press the Side button, and slide across the Emergency SOS option.

      This will make a call to the emergency services in your country. If your Apple Watch does not have a cellular plan, it must be close to a paired iPhone for this function to work.

      After the emergency call, the Apple Watch will alert each emergency contact and displays the Medical ID.

      FAQ related to emergency Medical ID

      Read more:

      Author Profile


      Mehak has a master’s degree in communication and over ten years of writing experience. Her passion for technology and Apple products led her to iGeeksBlog, where she specializes in writing product roundups and app recommendations for fellow Apple users. When not typing away on her MacBook Pro, she loves being lost in a book or out exploring the world.

      How To Find The Serial Number And Imei On Your Apple Watch

      If you need to contact Apple Support, check your warranty, or are interested in purchasing a used Apple Watch, you may need to grab the serial number or IMEI.

      Depending on the model, you can see these identifiers in the Settings, on your iPhone, and on the Apple Watch case. So, whether your smartwatch is up and running or missing in action, here’s how to find the serial number and IMEI on Apple Watch (Amazon, Best Buy).

      Table of Contents

      About the IMEI Number

      While all Apple Watch models have a serial number, not all have an IMEI. The IMEI (International Mobile Equipment Identity) is only available on Apple Watch GPS + Cellular models.

      If you’re unsure which model you have, you can identify your Apple Watch using the model number and Apple’s Support site.

      Open the Settings on Apple Watch

      If your Apple Watch is working and you’re able to open its apps, this is the handiest place to find the serial number and IMEI.

      Open the


      app on your Apple Watch. You can do this by pressing the Digital Crown and locating









      This screen provides you with the details of your Watch including the serial number, IMEI if applicable, and the model number.

      Open the Watch App on iPhone

      Maybe you don’t have your Apple Watch with you or you’re unable to use it or open apps. In this case, you can see its serial number and IMEI on your paired iPhone.

      Open the

      Apple Watch

      app on your iPhone.

      Select the

      My Watch

      tab at the bottom.







      Similar to the screen in Settings on your Apple Watch, you’ll see the serial number, IMEI if applicable, the model number, Wi-Fi address, and other details.

      Tip: You can copy the serial number from this spot too. Simply tap, hold, and select Copy.

      Look on the Apple Watch Case

      You can see the serial number for your Apple Watch on its case. The location differs depending on the model and the case does not include the IMEI.

      For the Apple Watch 1st generation, you’ll see the serial number engraved on the back of the case.

      For Apple Watch Series 1 or later, Apple Watch Hermès, Apple Watch Nike, and Apple Watch SE, the serial number is in the band slot.

      Remove the band from your Watch by holding the button on the back of the case and sliding the band outward. Look inside the band slot and you’ll see the serial number. (As you can see in the screenshot below from Apple’s website, it’s quite tiny. Consider using your iPhone magnifier to see it.)

      Other Spots With the Apple Watch Serial Number

      While the above locations are the quickest and easiest ones for finding your Apple Watch serial number, you do have a few other options. If you’re signed into iCloud using the same Apple ID as your other devices, you can look it up on your iCloud account.

      On iPhone or iPad, open the Settings and select your Apple ID. Move down to the devices area at the bottom of the screen and select your Apple Watch. You’ll see the serial number along with the model and watchOS version.

      On Mac, open System Preferences and select Apple ID. Choose your Apple Watch on the left and you’ll see its serial number and watchOS version on the right.

      On the web, sign into the Apple ID website. Choose Devices on the left and select your Apple Watch on the right. You’ll see a pop-up window with its serial number at the top and the bottom with additional details similar to that on your other Apple devices.

      With a couple of spots to find the IMEI on Apple Watch and several locations for the serial number, you can find these numbers easily when you need them.

      How To Automatically Change Your Apple Watch Face Based On Time Or Location

      Automatically changing watch faces is one of the many Apple Watch hacks few people know about. The process is pretty straightforward and involves using the Shortcuts app to create watch face automation.

      We’ll show you how to change Apple Watch (Amazon, Best Buy) faces based on time schedules and location activities.

      Table of Contents

      Note: Apple Watch automation in Shortcuts works with iPhones, and Apple watches running at least iOS 14 and watchOS 7, respectively.

      Change Apple Watch Face Based on Time

      Open the Shortcuts app on your iPhone and follow the steps below:

      Head to the Automation tab and select Create Personal Automation.

      Select Time of Day on the “New Automation” screen.

      Set the preferred time you want your Apple Watch’s screen changed. You can choose Sunrise, Sunset, or set a specific time of the day.

      To set a specific time, tap the preset time, and select the hour, minute, and time convention—AM or PM. Tap anywhere outside the time box to proceed.

      Next, select a “Repeat” schedule—Daily, Weekly, or Monthly—and tap Next in the top-right corner.

      For a “Weekly” schedule, choose the days you want the watch face automation repeated. If you prefer a “Monthly” schedule, select a day in the month when you want to repeat the automation.

      Tap the Add Action button.

      Go to the Apps tab, tap Watch, and select Set Watch Face.

      Alternatively, type watch face in the search bar and tap Set Watch Face.

      The next step is to select a watch face category. Tap Face in the “Set active watch face to” section.

      Select a watch face category to proceed. Or, tap Ask Each Time to manually choose your preferred watch face at the scheduled time.

      Refer to this Apple Watch User Guide document to learn more about watch faces and their features.

      Tap Next to continue.

      Toggle off Ask Before Running, select Don’t Ask on the prompt, and tap Done to save the automation.

      That’ll redirect you to the Automation dashboard. To edit the automation, tap on it and select the condition you want to modify. Tap Done in the top-right corner to save the changes.

      Toggle off Enable This Automation to suspend Shortcuts from automatically changing your watch face.

      To delete the automation, return to the “Automations” dashboard, swipe the watch face automation to the left, and tap Delete.

      The Shortcuts app will display a notification when the automation runs at the set schedule. Check your Apple Watch face to confirm if it works.

      If you want to change your watch’s face multiple times in a day, week, or month, you’ll need to create multiple automations. Say you want different watch faces at 10 AM and 6 PM every day; create automation for each period.

      Change Apple Watch Face Based on Location

      Having different watch faces based on different periods of the day is fun. However, changing your Apple Watch face based on your activities around a location is way more interesting.

      The Shortcuts app lets you configure your watch to use a new face when you arrive or leave an area. Follow the steps below to set up location-based automation for your Apple Watch face.

      Open Shortcuts, select Automations at the bottom of the screen and tap the plus icon in the top-right corner.

      Tap the Create Personal Automation button.

      Select Arrive if you want to change your Apple Watch face when you reach a preferred location. Otherwise, select Leave to change your watch face when you depart a place/location.

      Tap Choose in the “Location” row.

      Tap Allow While Using App to grant the Shortcuts app access to your location.

      Select a recent location from the list or enter an address in the search bar. Tap Current Location to set your present region as the preferred location. Tap Done in the top-right corner to continue.

      Select Any Time to use a different watch face any time you arrive (or leave) at the location. Otherwise, select Time Range to choose a period when the change occurs. Tap Next to proceed.

      Say you set a 5 PM – 9 PM time range; your watch face will only change when you arrive or leave the location within those hours.

      Tap Add Action to proceed.

      Head to the “Apps” tab, select Watch, and tap Set Watch Face.

      Better yet, type watch face in the search bar, and select Set Watch Face.

       Tap Face in the “Set active watch face to” section, choose a watch face category, and tap Next.

       Review the location-based automation and tap Done.

      Note: Unlike time-based automation, your watch face won’t change automatically when you arrive or leave a location. Instead, Shortcuts will display a pop-up asking you to confirm the watch face change manually.

      Watch Face Not Changing Automatically? Try These N Fixes

      Your watch may fail to automatically change its wallpaper if it’s outdated or disconnected from your iPhone. Bugs in your iPhone’s operating system can also cause the problem. If your watch face doesn’t change according to the time or location automation, these troubleshooting tricks should resolve the issue:

      Disable Airplane Mode on Your Apple Watch

      Airplane mode disconnects your Apple Watch from your iPhone. Swipe up from the bottom of your watch face and check the top-right corner of the Control Center.

      If a red crossed-out phone icon is in the top-right corner, your Apple Watch isn’t connected to your iPhone. Disabling airplane mode should fix this problem.

      Scroll down to the Control Center, tap the orange airplane icon, and wait for the iPhone icon to turn green.

      Additionally, make sure Wi-Fi and Bluetooth are toggled off in the “Airplane Mode Behavior” section.

      One more thing: make sure your iPhone and Apple Watch’s Bluetooth are turned on. Open your watch’s Settings app, tap Bluetooth, scroll to the bottom of the page, and toggle on Bluetooth.

      Refer to our tutorial on reconnecting Apple Watch to iPhone if the problem persists.

      Check Location Services Permission

      You need to grant “Shortcuts” and “Apple Watch Faces” access to your location to use location-based automation. Failure to do so will prevent the app from tracking your arrival or departure from an area.

      Return to the Location Services menu and configure the same location access for the Shortcuts app.

      Select Shortcuts, select While Using the App, and toggle on Precise Location.

      Restart Your Devices

      Rebooting your Apple Watch or iPhone can fix temporary glitches preventing your watch face from changing automatically.

      If you’re charging your Apple Watch, take it off its charger. Press and hold the watch’s side button and drag the Power Off slider to the right.

      Wait for 30 seconds for your watch to shut down completely. Afterward, press and hold the side button again to restart the watch. Release the button when you see the Apple logo on the screen. If the problem persists, reboot your iPhone and check again.

      Update Your Devices

      Software bugs in your iPhone or Apple Watch’s operating system can prevent both devices from synchronizing information correctly. Open your Apple Watch and iPhone settings menu and install any available software update for both devices.

      Automation is Fun

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