Miya Pearson
The Polar A370 is a fitness-tracking wristband that offers continuous heart-rate monitoring, GPS, and a sleep-tracking tool called Polar Sleep Plus. The A370 tracks your sleep if you wear it at night, detecting when you fall asleep and when you wake up. It observes your hand movement to track interruptions and tells you how much time you actually spent asleep. This data is shown in the Flow app and web service after syncing. The A370 also allows you to set your preferred sleep time and rate your sleep, providing feedback on your sleep quality and duration. The sleep-tracking feature offers insights into your sleep patterns and can help you understand the external factors influencing your sleep.
| Characteristics | Values |
|---|---|
| How it works | Detects when you fall asleep and when you wake up, tracking hand movement to observe interruptions |
| Data analysis | Provides deeper analysis in the Polar Flow app and web service |
| Data presentation | Data is shown in the Flow app and web service after syncing; can be viewed in one night and week views |
| Sleep rating | Users can rate their sleep in the app, which is accompanied by feedback based on sleep data, preferred sleep time and sleep rating |
| Sleep tracking tool | Polar Sleep Plus |
| Heart rate tracking | Continuous heart-rate tracking, sampling heart rate every 5 minutes during the day and night |
| Additional features | Supports phone notifications from any app, alarms, and messages encouraging users to move |
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What You'll Learn
Syncing with the Polar Flow app
The Polar A370 is a fitness-tracking wristband that can be synced with the Polar Flow app to track your sleep. The A370 tracks your sleep if you wear it at night, detecting when you fall asleep and when you wake up. It collects data for deeper analysis in the Polar Flow app. To sync the tracker with the app, press and hold the side button on the A370. This is the same button used to pause or end a workout.
The A370 observes your hand movement during the night to track all interruptions over the entire sleep span, telling you how much time you actually spent asleep. This data is shown in the Flow app and web service after syncing. The Flow app and web service show your sleep data for one night and week views. In the Flow web service, you can view your sleep under the Sleep tab in your Diary. You can also include your sleep data in Activity reports under the Progress tab.
In the Polar Flow app and web service, you can set your preferred sleep time to define how long you aim to sleep every night. You can also rate your sleep and receive feedback on how you slept based on your sleep data, your preferred sleep time, and your sleep rating. The in-app sleep-continuity rating tells you how many times you woke during the night, and you can give feedback on each night's sleep. The nightly report also includes your lowest heart rate during sleep.
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Setting a preferred sleep time
The Polar A370 is a simple device to use, with not too many options to configure. The unit's display is turned off unless you raise your wrist or tap the button on the left side. From there, you can swipe and tap the screen to navigate. The default screen is the clock, which shows the current time and your progress towards your step goal.
To change the time, you'll first need to change the time zone on your computer and then sync your A370. If you change the time or time zone on your mobile device and sync the Polar Flow app with the Polar Flow web service and your A370, the time will also change on your watch.
You can also edit your settings any time in the Polar Flow web service and mobile app. To do this, plug your A370 into your computer's USB port, go to flow.polar.com and sign in. Go to Products and Settings, choose your A370, and click to change the handedness. The display orientation on your watch will change on the next synchronization.
The Polar A370 has a new sleep-tracking feature that provides more detail than past Polar devices, including expanding out details on your mobile app. This feature generally does well in terms of sleep tracking and the quality scores it gives.
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Rating your sleep
The Polar A370 is a fitness-tracking wristband that can track your sleep if you wear it at night. It uses a new sleep-tracking tool called Polar Sleep Plus to detect when you fall asleep and when you wake up. It also observes your hand movement to track interruptions and tell you how much time you actually spent asleep.
To rate your sleep, you must first sync your A370 with the Polar Flow app. When you open the Flow app, tap the sleep icon or go to the Sleep tab, where you'll get a pop-up requesting your rating. You can also disable this function if you don't want to rate your sleep in the app in the future.
You can also rate your sleep at flow.polar.com. Under the Sleep tab, you can click Edit and change your rating. Clicking More will show your longer sleep feedback and tips for better sleep.
The A370 also offers a summary of your sleep about 90 minutes after you wake up, and at the end of it, you can rate it with helpful smiley icons. This rating is attached to your sleep card under My Day. You can adjust your preferred sleep time in your Flow Account settings.
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Viewing sleep data
To view your sleep data, you must first sync your A370 device with the Polar Flow app. To do this, press and hold the side button on the A370. Once synced, your sleep data will be available to view in the Flow app and web service.
In the Flow app, tap the sleep icon or go to the Sleep tab. Here, you will be asked to rate your sleep, which you can disable if you do not want to do so. You can also rate your sleep at flow.polar.com, where you can also edit your rating and view longer sleep feedback and tips for better sleep by clicking 'More'.
The Flow web service will show your sleep data for one night and over a week. You can view your sleep under the Sleep tab in your Diary. You can also include your sleep data in Activity reports under the Progress tab.
In the Polar Flow app and web service, you can set your preferred sleep time to define how long you aim to sleep every night. The app will then give you feedback on how you slept based on your sleep data, your preferred sleep time, and your sleep rating.
The A370's sleep-tracking tool, Polar Sleep Plus, offers more detail than past Polar devices, including expanding out details on your mobile app. It tracks your sleep by observing your hand movement during the night to track all interruptions over the entire sleep span, telling you how much time you actually spent asleep. It also provides your lowest heart rate during sleep, which is useful for people with sleep disorders or heart problems.
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Sleep tracking accuracy
The Polar A370 tracks your sleep if you wear it at night. It uses a new sleep-tracking tool called Polar Sleep Plus, which detects when you fall asleep and when you wake up. It observes your hand movement during the night to track all interruptions over the entire sleep span, and tells you how much time you actually spent asleep. The A370 collects this data for deeper analysis in the Polar Flow app and web service.
The Polar Flow app and web service show your sleep data in one-night and week views. In the Flow web service, you can view your sleep under the Sleep tab in your Diary. You can also include your sleep data in Activity reports under the Progress tab. In the Polar Flow app and web service, you can set your preferred sleep time to define how long you aim to sleep every night. You can also rate your sleep and receive feedback on how you slept based on your sleep data, your preferred sleep time, and your sleep rating.
The A370's sleep tracking feature offers far more detail than past Polar devices, including expanding out details on your mobile app. It tracks the times you go to sleep, as well as the quality scores it gives. However, one reviewer noted that the A370 did not capture that they went back to sleep for 2-3 hours after getting back to sleep at 5:30 AM. The reviewer noted that this seemed to be a one-off, as the A370 handled interruptions just fine on other nights.
The A370's continuous heart-rate tracking provides a more comprehensive look at your sleep patterns. It samples your heart rate every 5 minutes during the day and night, and your lowest heart rate during sleep is included in the nightly report. This data point is likely more useful to people with sleep disorders or heart problems.
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Frequently asked questions
The A370 uses a new sleep-tracking tool called Polar Sleep Plus. It tracks your sleep if you wear it at night, observing your hand movement to monitor interruptions and telling you how much time you actually spent asleep.
Press and hold the side button on the A370 to sync the tracker with the Polar Flow app.
When you open the Flow app, tap the sleep icon or go to the Sleep tab. You'll then get a pop-up requesting your rating. You can disable this function if you don't want to rate your sleep.
