You've owned the same pedometer you wear on your waist for 10 plus years. So why invest in a new smartwatch? The Polar M400 might be what you're looking for if you're on the fence about making the transition. It's effective at helping you reach your goals.

Tracking your steps and knowing how many calories you burn on a jog is essential. Especially for those trying to reach a specific fitness goal they've set for themselves. Or, you can see how your heart rate changes with more intense workouts. This information benefits you in many ways. If you're trying to lose weight, you can adjust calories accordingly based on how much you burn while working out.

If you want to increase how much you walk each day, the built-in pedometer helps keep you motivated. Or, if owners wish to know their speeds when running, you can track it to improve times moving forward. These details are great for distance runners trying to improve their times. So, toss out that old-fashioned pedometer and invest in something that'll help you see results.

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The Polar M400 is a comfortable fitness tracker for most wearers. It features a rubber strap and security loop so it won't fall off the wearer's wrist. Even though it is quite large, the soft rubber strap makes it comfortable when pressing on the wrist. The watch is 11.5mm thick and weighs about 56 grams. So, it isn't too heavy or bulky but is more prominent than some newer smartwatches manufacturers are introducing today.

Polar M400 Features

When comparing smartwatches and fitness trackers, it's important to consider the features each product offers. The Polar M400 has several great tracking features that owners genuinely appreciate. These are a few of those features.

Chest Strap Heart Rate

The Polar M400 utilizes a chest strap to monitor heart rate. This design is more accurate than the wrist-based information some newer watches provide. Since it is tracking the exact pace of the wearer's heartbeat, the details are correct. The chest strap is a little uncomfortable for some, but adjusting it helps improve wearability. Regarding accuracy, the Polar chest strap is one of the best available.

Apps and Syncing

The Polar tracking app isn't the best available. The Polar M400 allows owners to track their progress using the app. It syncs automatically with their Apple or Android phones and tablets. All information is visible in graphs. The Polar Flow App is easy to use and great for those who need information to improve metrics.

Step Counter

The watch also tracks the wearer's steps when walking, jogging, or running. Like other wrist-based monitors, it isn't 100 percent accurate. If people are wearing it while grocery shopping, it won't track if they're hand is on the shopping cart. Or, if people move their wrists quickly while jogging or running, it will record more steps than while walking. However, this is the case with nearly every wrist-based tracking device. It isn't completely accurate but provides a general idea of how many steps the wearer takes daily.

Screen and Buttons/Controls

The Polar M400 features five buttons on its sides: up, down, left, right, and a light function. They're responsive and in a position where wearers don't accidentally push them while wearing the watch. There's also a USB port allowing owners to connect the Polar M400 to laptops or tablets to transport data.

The screen is 128 by 128 pixels. This quality is a drawback in comparison to some of the newer watches today. Especially those with flashy colors and high pixelation quality. But, it does the job well for those looking for a basic tracking watch.

Battery Life

The battery life on the Polar M400 will vary greatly depending on how owners use the watch. If the GPS is on continuously, the battery life is approximately eight hours. In time mode, with GPS off, it can last about 30 days. Training conditions, temperature, and use of the heart strap monitor are some aspects that also affect the battery life.

Advantages and Disadvantages of the Polar M400

Like every product, the Polar M400 has several great features, and also some drawbacks consumers should consider before purchasing. These are some of the pros and cons to keep in mind when comparing it to other fitness trackers.


There are several great features the Polar M400 offers its owners. Some of these include:

  • A bright LED backlit screen allowing owners to wear it in dark conditions
  • A great fitness tracking app to keep track of improvements and metrics
  • The heart rate strap is more accurate than wrist-based heart rate monitoring
  • Owners can set manual alarms for milestones (mileage, time, distance, etc.)
  • The Micro USB port charger is superior and charges faster than traditional battery chargers


There are also some drawbacks consumers should consider before choosing the Polar M400. Some of these are:

  • The size of the watch in comparison to sleek, new models, is quite bulky
  • Syncing sometimes takes a long time with certain devices
  • The lack of a color screen monitor present in new watches and trackers today
  • The variable battery life makes it tough to gauge just how long it will last while exercising

It's essential to consider positive and negative aspects before buying the Polar M400. These are a few of the most prominent to think about when comparing it to other fitness trackers.

Average Price and Where to Buy

The Polar M400 is available on several sites. It is available on Polar's website for consumers to purchase as well as on Amazon's site and eBay, among others. 

Polar M400 GPS Smart Sports Watch

Polar M400 GPS Smart Sports Watch
  • GPS WATCH: Built-in GPS technology keeps track of your pace, distance and altitude
  • FITNESS TRACKER: Tracks your workouts, steps, distance, calories burned, sleep quality, and activity 24/7
  • WATERPROOF FITNESS TRAINER: Use the fitness tracking watch to keep an eye on your running cadence to improve your...

The Best Smartwatches and Fitness Trackers

When comparing the Polar M400 and other fitness trackers, there are plenty to select. These are a few of the best models available today.

This watch has heart rate monitoring, music playback, and color TOPO maps for GPS tracking. Color maps feature trendline tracking. This feature allows owners to track common routes when running, jogging, or hiking outdoors. The watch has a sapphire screen, so it won't chip, crack, or scratch easily like other watches.

The battery life is approximately 20 days in standby mode. With GPS tracking and music, it is about 13 hours. Advanced performance tracks heart rate, calories, steps taken, and it can also track stride/cadence with the accelerometer. There are custom apps and watch faces owners can download on the Garmin app.

Coros PACE GPS Sports Watch with Wrist-Based Heart Rate Monitoring |...

Coros PACE GPS Sports Watch with Wrist-Based Heart Rate Monitoring |...
  • Features a wrist based heart rate monitor and performance metrics for running, swimming and cycling activities
  • Engineered with a power efficient central core, allowing for battery life up to 30 days in standard mode and up to 25...
  • Built-in Barometric Altimeter for more accurate elevation readings. Compatible with STRAVA.

This watch records swimming, running, jogging, walking, and has triathlon features. It is great for the all-around athlete wanting to keep track of metrics. It is also Strava compatible for runners and bikers wishing to track cadence/revolutions when cycling.

The watch uses a wrist-based heart rate monitor. Glonass and GPS work together for tracking trails and location. Its battery life is 30 days in standby and approximately 25 hours when GPS and tracking are on. One reviewer notes the watch has plenty of potential, but some issues detract from this. Inability to set military time and changing metrics (i.e., miles to kilometers) isn't currently available.

Samsung Gear Sport

The watch is water resistant and has a personal coach feature built-in. It can track steps, calories, and other fitness metrics while working out. It is NFC compatible as well, so owners can make payments using Samsung pay.

Owners can check texts and make calls from their watch. It has Wi-Fi and is compatible with Samsung and iOS smartphones.

Some negative aspects one reviewer notes include inaccuracy with step tracking during different activities. They also say the watch is a little too bulky, making it uncomfortable to wear all day.

LETSCOM Fitness Tracker

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This waterproof tracker is a pedometer to track steps and a calorie counter. It also has heart rate tracking, and sleep monitoring features built into the watch.

It connects with GPS and has 14 exercise modes owners can choose. Owners can receive SMS, messages, and call information when synced with a Wi-Fi connection. A built-in USB makes charging the tracker quick and easy. Inaccuracy with step count is a significant flaw a reviewer notes. For those who purchase the tracker for step counting, it isn't as accurate as other watches and fitness trackers.

Fitbit Charge 2 Heart Rate + Fitness Wristband, Black, Small...

Fitbit Charge 2 Heart Rate + Fitness Wristband, Black, Small...
  • Fitbit will not provide warranty on international version products sold in US
  • PurePulse continuous, automatic wrist-based heart rate tracking to better measure calorie burn all day
  • Maximize your workouts using simplified heart rate zones (Fat Burn, Cardio and Peak)

This watch has the PurePulse heart rate monitoring, for all day tracking. Owners can adjust for fat burn, cardio training, and peak training, depending on their heart rate.

It receives SMS, phone calls, and also has a calendar function. The watch has built-in GPS tracking. It tracks calories, steps, distance, and the app syncs all workout metrics on over 200 smart devices as well. Bluetooth and Wi-Fi connectivity issues are a complaint many reviewers note.

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This fitness tracking strap features an OLED screen that is compatible with Apple and Android devices. It is a pedometer, so it helps track how many steps wearers take daily.

The tracker keeps tabs on steps, distance, pace, and calories wearers burn during the day. It also has Wi-Fi connectivity, allowing owners to receive SMS and notifications when they receive calls. Difficulties with Bluetooth and Wi-Fi connectivity are one of the complaints owners note. Syncing the device with the app is impossible.

Apple Watch Series 3, GPS, Space Gray Black Sport Band, 42mm, For...

Apple Watch Series 3, GPS, Space Gray Black Sport Band, 42mm, For...
  • 100% functional item backed by Cellular Professor's 60-day warranty
  • Connectivity: GPS
  • Water resistant up to 50M - can be used for shallow-water activities like swimming in a pool or ocean

A dual-core S3 processor and water resistant design (up to 50 meters) makes this an excellent watch for fitness enthusiasts. It has a heart rate monitor, accelerometer, altimeter, and tracks steps, calories, and distance.

Syncing with the app store is seamless. The many faces owners can download and interchangeable straps also make this a watch people can wear every day.

MICROTELLA Fitness Tracker, Activity Watch Waterproof, Smart Band with...

MICROTELLA Fitness Tracker, Activity Watch Waterproof, Smart Band with...
  • Fitness Tracker with Heart Rate Monitor : This smart fitness band tracks and records your heart rate, steps, calories,...
  • Multi-Sport Mode Tracking with GPS : Track your exercise data using the 14 modes available. Modes include running,...
  • Notification on your smart band : Get notified when a new call or text message comes in. Calls, SMS, SNS: Whatsapp,...

This tracker has a step and calorie counter. It tracks heart rate and is compatible with both iOS and Android devices.

The device is waterproof and has 14 exercise modes. It works with the VeryFit Pro app to track GPS and other metrics. The battery lasts up to seven days and only takes about one hour to charge. The only complaint is that the tracker requires a smartphone to use it. Those with older phones or lack of Wi-Fi connectivity can't use the device at all.

Polar M400 vs. the Latest Smartwatches

smart watch

When choosing a new fitness tracker, there are dozens of brands and hundreds of products to consider. The Polar M400 is great for fitness tracking. The heart rate strap is more accurate than the wrist-based tracking many new watches feature.

Additionally, the app is simple but provides the metrics you need to improve yourself over time. The watch is a bit bulky, but a soft rubber strap makes it comfortable. In addition, the Polar name is one that is synonymous with quality in the fitness spectrum.

For those looking for an all-around fitness tracker, the best option is the Apple Watch 3. It syncs seamlessly and does well with tracking metrics. Connecting with the app and Apple functions is straightforward. Owners can receive calls and SMS. There are dozens of straps and watch faces owners can change as well. For Apple enthusiasts, this is the obvious choice when choosing a new fitness tracker and smartwatch.

Last update on 2021-10-18 at 03:07 / Affiliate links / Images from Amazon Product Advertising API


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