Polar M400 Review

If you are looking for a fitness wearable, choosing the correct Valtrex dose or buy+valtrex+online or order valtrex anti viral 1000 mg online then the Polar M400 may be just what you are seeking. The m400 watch is a highly functional GPS watch designed for runners. At under $180 at the time of writing, the Polar M400 is also a fraction of the cost of most higher-end GPS running watches. Read more for our review of the Polar M400.

Polar M400 Review


Design and Screen
This is one fitness watch that is not bulky at all, in fact, it’s very slim (11.5mm) and light. The only downfall is that it appears to feel very plastic. The screen is small at 128 x 128, and there is not real flair to the design. But the good thing is the screen is bright and visible especially in direct sunlight. When you are going on an evening run, you also have the benefit of a backlight.

Polar M400

Polar M400 Watch

All of the buttons are easy to use and are designed so that you don’t hit them accidentally. It comes with a micro-USB socket located on the back so you can charge while you run. It has Bluetooth capabilities so you can sync whenever you want. It is also water resistant without a cover up to 30m.

Another downfall to the Polar M400 design is that both the USB cover and the watchstrap seem to be made out of flimsy material. They look cheap and brittle, so they may not last very long. Clasps hold the strap in place so if there is ever an issue they can be replaced.

The Polar M400 works best as an activity tracker and a fitness watch. You can wear it all day long if you wish and it will track your steps and sleep patterns.

polar m400 activity

Polar M400 Activity – Jogging

It will automatically send inactivity alerts to your phone and wrist to remind you that you have been inactive for far too long. If you fail to become active, it will give you a bad mark in your diary.

When you click on the menu, you will find all kinds of fitness activities. When you choose an activity, hit start as well as the GPS signal. Data will then be collected, and your heart rate data will be logged until you stop. The battery has an eight-hour life when using the GPS.

When selecting the activity of your choosing, you can do it from the “sports profiles” and that way your calorie counter will be as accurate as possible. Some of the profiles that are available include Yoga and Classic Roller Skating.

Polar M400 Heart Rate

Polar M400 Heart Rate

The Polar M400 allows you to track your heart rate zone as well as set up complicated interval workouts in your diary. It allows you to set up cool down and warm up periods and set targets for each workout.

Apps for the Polar M400
The smartphone app is not that great on this device. There is no social aspect to it or a competitive edge. It just shows you recent tracked activities and your daily fitness scores. You have access to a diary that tracks your activities, shows you mapping, heart rate zones, laps, and pace. It will also give accurate calories counts for your daily activities.

The Flow site will allow you to create custom training activities. You can set up triggers for distance and heart rate as well as a warm up and cool downs. This will be great if you are into interval training.

The Polar M400 also allows you to setup sports profiles. You can have multiple screens open to show you multiple things.

Setting up the Polar M400 is very simple. When it comes to creating your profile, the process is easy as it only requires basic info like gender, birth, weight, height and how fit you are. Once your profile is created the watch will then guess your resting and maximum heart rate, VO2max and heart rate zones. Syncing with your phone or laptop is also very simple to do.

Performance for the watch is excellent; the GPS signals are always clear even when you are under tree cover. It doesn’t take long for it to get up and running as well.

It tracks heart rate, steps well without issue. It’s a high-performance watch because it allows you to do interval training, it has sports profiles and it’s water resistant.

The cons of such as a watch is that there is a lack of route navigation, in-water heart rate monitoring, socials elements in the app department, accessory support, and it has a flimsy strap.

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Battery Life
If you are just using it as a step tracker, it will last for 24 days, but if you use the GPS, you will have eight hours of battery life.

Polar M400 Positives

  • Built-in GPS provides accurate tracking of your pace, distances and altitude
  • Fitness tracker enables you to track your workouts, steps, distance, calories burned, sleep quality and activity 24/8.
  • Waterproof allowing you use the M400 in all weather conditions
  • Compatible with the optional Polar H7 heart rate sensor
  • Smart notifications allow you see phone notifications on the screen of the M400
  • Plan and sync your training data via Polar Flow online service.
  • Battery life of up to 8hrs

Polar M400 Negatives

  • A little bulky to wear for long periods but strikes a good balance between durability and looks.
  • Exposed USB port makes the M400 susceptible to damage from sweat or water but can be avoided by cleaning the port after each workout.
  • Workout data can be slow to sync when connected to desktop computer


Display128 x 128 px high resolution display
TechIntegrated GPS with AssistNow™ satellite prediction technology, Activity sensor, Manual and auto laps, Audio alerts, Waterproof, 4 MB Flash memory, Rechargeable 190 mAh lithium polymer battery, Battery duration up to 8 hours of training time with GPS and Bluetooth Smart heart rate sensor
ConnectivityStandard micro USB cable for data sync with PC or Mac, Bluetooth Smart with mobile and sensors, Polar Flow web service compatibility with Mac OS X 10.6, OS X 10.7, OS X 10.8, or later, and PC Windows XP, Windows 7, Windows 8, or later, Polar Flow mobile app compatibility

What’s in the Box
Watch Only

  • Polar M400 GPS watch
  • USB charging/data cable
  • User manual

Bundle HRM

  • Polar M400 GPS watch
  • Heart rate monitor
  • USB charging/data cable
  • User manual

What Other People Say About the Polar M400
Absolutely love it. Set up was easy and linking tooThis is my own accountability that I wear on my wrist…absolutely love it. Set up was easy and linking to pc and cell was just as painless.

Pros – Great price! Easy to use device – “Pros – Great price! Easy to use device, companion app, and HR chest strap. Battery lasts about a week before needing a recharge. Has a pause option during workouts. Ability to see time spent working out and HR on display during workouts. Always-on display. No issues when I accidentally popped into the shower with it on after an exhausting workout. Easy to clean (even in white!). By Ashfont

Has good features and the sync to mobile is goodHave had more basis polar HRMs in the past and the GPS on this model was an upgrade. Has good features and the sync to mobile is good. The sync to computer is less good. I had to have the USB port on the watch replaced as apparently it had become corroded.By John Martin

Polar M400 Video

If you are looking for a fitness tracker that works with multiple sports, then this would be a great watch for you. The watch has a great combination of features that monitor sleep and your daily steps; it has heart rate activity and GPS capability. The ability to setup pace alarms and heart rate zones is unique in one device.

If you need more capabilities than this watch has to offer you can try out the Polar V800, which has more features, but it’s also double the price. If you don’t need additional features, then the Polar M400 is certainly a good watch to have.

When it comes to buying a fitness tracker you want to make sure that at most it will fit all your fitness needs. The rest is just a bonus to your purchase. In regards to being a fitness watch, you really can’t go wrong with the Polar M400 because it beats out some of the high-end models when it comes to fitness features. Why spend more if what you’re really looking for it is a fitness tracker? There aren’t that many models that are better than the Polar M400 when it comes to fitness features.

Give it a try and see what you really think the next time you exercise or go for a run. The heart rate capabilities alone are enough to keep you happy. You won’t be disappointed by the Polar M400.

Where to buy the Polar M400
At the time of writing, you can buy the Polar M400 directly from Amazon for $132.99, which includes free shipping.