Last Updated & Fact Checked: March 21, 2026
Are you trying to decide between the Fitbit Surge and the Polar M400?
Product Versus will provide you with all the product details so you can quickly compare the facts to find which product is right for you – the Fitbit Surge or the Polar M400 – and find out exactly what the differences are.
Both the Fitbit Surge and the Polar M400 are quality products, so read on to find out which one is best for your needs!
Fitbit Surge quick facts
Polar M400 quick facts
Fitbit Surge product details
Bestseller No. 1
Fitbit Charge 6 Fitness Tracker with Google apps, Heart Rate on Exercise Equipment, 6-Months Premium Membership Included, GPS, Health Tools and More, Obsidian/Black, One Size (S & L Bands Included)
- Find your way seamlessly during runs or rides with turn-by-turn directions from Google Maps on Fitbit Charge 6[7, 8]; and when you need a snack break on the go, just tap to pay with Google Wallet[8, 9]
Bestseller No. 2
Fitbit Surge Fitness Superwatch, Black, Small (US Version)
- Surge syncs automatically and wirelessly to tablets, computers and 150+ leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology
- Get continuous, automatic, wrist based heart rate and simplified heart rate zones
- Track workouts & view workout summaries; plus all day activities including steps, distance, calories burned, floors climbed and active minutes
- Monitor your sleep automatically and wake with a silent alarm
- US Version
Bestseller No. 3
![Kissmart Charger for Fitbit Surge, Replacement Charging Cable Cord for Fitbit Surge Fitness Superwatch [1m/3.3ft]](https://m.media-amazon.com/images/I/41Q+s2mhy+L.jpg)
Kissmart Charger for Fitbit Surge, Replacement Charging Cable Cord for Fitbit Surge Fitness Superwatch [1m/3.3ft]
- ▶Compatible with: This charger cable compatible with Fitbit Surge smart watch.
- ▶Premium & Speedy: The surge charging cable is made of high quality wire, provides a stable performance and a fast charging, about an hour a full charge.
- ▶Safe Protection: The charger cable built in smart chip, protect your surge from over-current, over-voltage, over-circuit protection, offers a safe environment for charging.
- ▶Convenient and Easy to Use: To get a charging just plug it into USB port on your PC, laptop, notebook, wall charger or car charger. Geting a better experience, we suggest you to use the recommended adapter (5V 1A).
- ▶Package includes: 1 x 3.3ft/100cm Charger for surge (watch is not included). with sincerely after-sales service, if have any question we will deal with it for you within 24 hours.
Polar M400 product details
Bestseller No. 1
kwmobile Strap Compatible with Polar M400 / M430 Strap - Replacement Silicone Watch Band - Black
- COMPATIBLE WITH: Polar M400 / M430 - PLEASE NOTE: "Since the models may differ slightly in construction, we request that you safely remove any plastic parts on the fitness tracker before mounting the bracelet.
- SOFT MATERIAL: TPU silicone strap is flexible, waterproof and durable; protects from scratches, wear and tear
- ADJUSTABLE: Band measures approx. 6.3 - 9.5 inches (16 - 24 cm) and can be adjusted with the buckle
- NEW LOOK: Personalize your activity tracker with these straps or use them as replacement bands
- NOTE: Silicone watch strap does NOT include fitness tracker
Bestseller No. 2
QGHXO Band for Polar M400/M430, Soft Adjustable Silicone Replacement Wrist Watch Band for Polar M400/M430 Watch (Black)
- Changeable wristband compatible with the Polar M400/M430 fitness watch (M400/M430 fitness watch not included)
- Lightweight, seamless design, Fully waterproof for swimming
- Comfortable, soft-touch wristband is made of durable silicone material
- Customize your M400/M430 with vibrantly colored wristbands
- Band Wide: 23MM, Band length: 235MM. Note: This silicone band for Polar M400 GPS Smart Sports Watch and Polar M430 GPS Running Watch Only
Bestseller No. 3
Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women, Red, M-XXL
- WORKS WITH EVERYTHING: Polar HRM works with many smart watches, Polar Beat, apps such as Strava and Nike, and ALL HRM compatible Equipment.
- SUPREME ACCURACY: Widely recognized for its top precision by many sources, Polar H10 is the most accurate heart rate sensor in Polar's history. Polar H10 provides top quality measurement.
- CONNECTIVITY: Bluetooth, ANT plus and 5 kHz provide an excellent variety of connection options. You can use Bluetooth and ANT plus connections simultaneously as well as two Bluetooth connections simultaneously.
- POLAR PRO CHEST STRAP: With improved electrodes, an easy-to-use buckle and silicone dots, the strap is comfortable and interference-free.
- VERSATILITY: Polar H10 is fully waterproof and it has internal memory for multiple hours.
New products & alternatives to the Fitbit Surge and the Polar M400
New
Smart Watch for Men Fitness Tracker: Waterproof Military Digital Mens Watches Running Make Answer Call Smartwatch Android Phone iPhone Samsung Compatible Sleep SpO2 Heart Rate Monitor Step Pedometer
- Military Standard Quality: Military smart watches for men is manufactured according to military standards, pedometer watch for men have strong resistance to scratches, drops and polishing, and have passed the tests of temperature, high altitude and low air pressure, dust, salt spray and liquid contamination, easily adapts to different harsh working environments.The ios android smart watch is equipped with a 2.06" AMOLED color screen, delivering superior image quality and touch sensitivity.
- Monitor Health in Real Time: Heart rate monitor watch uses high-performance optical sensors to monitor dynamic heart rate in real time 24/7.Fitness watches for men can also accurately track your personal sleep and detect blood oxygen saturation and stress levels to adjust your physical condition in a timely manner. The app even offers a detailed sleep quality analysis report (light/deep/awake sleep stage), helping you adjust your lifestyle towards a healthier lifestyle.
- 100+ Sports Modes: With more than 100+ sports modes, this fitness tracker supports running, cycling, climbing,walking,yoga, skiing, football, and more.Digital watch men tracks your daily data such as steps, time, distance, and calories, and connects to the GPS on your phone to record all your training routes and fitness using the app to further motivate yourself to complete your exercise plan. Sports watch is an IP68 waterproof device that can meet your daily needs.
- Smart watch with text and call: ios android smart watches for women men is equipped with a clear speaker,step counter watch can directly use ladies watch to answer make calls/read messages/play music/store contacts.You can get notifications of calls, SMS and SNS messages, Whatsapp, text, facebook etc.ios android smart watch can support most android and iOS phone(andriod 5.0 and above iOS 9.0 and above).Such as compatible with iPhone, Samsung, HUAWEI,etc
- Activity trackers and smartwatches wih multifunction: This smart watch for iphone compatible has many functions, such as alarm, weather forecast, stopwatch,sleep mode clock, timer, calendar, music control, remote camera,flashlight，breathing training, sedentary reminder, find watch, find phone, screen brightness adjustment etc. Smart watch for android phones comes with 2 watch straps of different colors
New
Health Fitness Tracker with 24/7 Heart Rate, Smart Watch with Blood Pressure and Blood Oxygen Monitor, Bulit-in 120+ Sport Mode, Sleep Tracking Waterproof Activity Tracker for Women Men (Silver)
- Upgraded double magnetic strap offers a stronger, more secure fit than single magnetic designs. Less likely to loosen or detach.
- 1.47'' COLOR DISPLAY: The sleek 1.47" HD color display with a curved design provides an enhanced visual and touch experience, making navigation effortless and enjoyable. Customize the watch face function to allow you to design your own display style.
- ALL-DAY HEALTH MONITORING: Keep a close eye on your heart rate and blood pressure around the clock with the Sunorshop fitness tracker, enabling proactive wellness management. Track oxygen levels to boost your vitality and engage in guided breathing exercises. Dive into comprehensive sleep analysis for optimal rest. Achieve a healthier life directly through your watch. (for reference only, not for medical use)
- ELEVATE YOUR WORKOUTS: Track daily activities including steps taken, calories burned, and distance walked. Explore over bulit-in 120 sport modes to fit your daily exercise needs at various intensities and build a personalized workout by integrating your favorite sports into your smart watch.
- MULTIFUNCTIONAL ASSISTANT: Benefit from the Sunorshop smartwatch's practical notification functions, bringing convenience right to your fingertips. Receive instant notifications for incoming calls and texts directly on your wrist while on the go. Weather updates, music control, menstrual cycle reminders, alarm clock, shutter control, stopwatch, hydration alerts, sedentary reminders, and so on.
New
Amazfit Bip 6 Smart Watch 46mm, 14 Day Battery, 1.97" AMOLED Display, GPS & Free Maps, AI, Bluetooth Call & Text, Health, Fitness & Sleep Tracker, 140+ Workout Modes, 5 ATM Water-Resistance, Black
- Stylish Design, Vibrant Display: The lightweight aluminum build blends effortless style with workout durability, while the vivid 1.97" AMOLED display keeps your data easy to read, even under bright sunlight.
- All-in-One Activity Tracking: The Amazfit Bip 6 fitness tracker watch offers 140+ workout modes including HYROX Race and Strength Training, plus personalized AI coaching and 50m water resistance.
- Up to 14 Days Battery Life: The Amazfit Bip 6 smart watch powers through your training and recovery for up to two weeks at a time - no nightly charging needed.
- Accurate GPS Tracking & Navigation: Stay on course with free downloadable maps and turn-by-turn directions. Support from 5 satellite systems ensures precise tracking of every move and fast GPS connection.
- 24/7 Health Monitoring: The Amazfit Bip 6 smartwatch provides precise, real-time monitoring of heart rate, sleep, blood-oxygen and stress, empowering you with actionable insights to optimize your health and fitness.
New
FITVII FINO 2 Slim Fitness Tracker, Smart Watch with Blood Oxygen, Sleep Monitor, 24/7 Heart Rate & Blood Pressure, IP68 Waterproof Health Activity Trackers with Calories Step Counter for Women Men
- Comprehensive Health Indicators Monitoring: This slim smart fitness tracking watch provides sleep, blood oxygen, 24-hour heart rate and 24-hour blood pressure monitoring. You can conveniently view these real-time health indicators from your wrist anytime, anywhere, and view recent data records in the APP. FITVII Fitness Tracker provides you a more accurate monitoring information to help you explore a healthier lifestyle.
- Intelligent Sleep Monitoring & Analysis: Monitor your falling asleep and waking up time (light and deep sleep) through graphs and charts to better record your sleep quality. You can view daily, weekly and monthly sleep data in the app, helping you better adjust your habits to improve sleep quality. You can also set a silent alarm to wake you up by buzzing without disturbing others.
- Multiple Sports Modes & Activity Tracker: This fitness tracker watch has multiple sports modes such as running, basketball, walking,climbing,cycling,yoga, and elliptical. As an activity pedometer, it can record calories burned, steps, distance, and speed in real-time and accurately. You can also set exercise goals through the app to encourage a healthy life. Whether you go to an indoor gym or run outdoors, this fitness watch fits perfectly into your daily life and lets you enjoy your workout to the fullest!
- Real-Time Notifications For Incoming Calls & Messages: Incoming calls, text messages, and app messages (including Facebook, X, WhatsApp, Ins, Messenger, etc.) can be received and read on your wrist. When an incoming call comes in, you can view the caller's name or phone number on your watch to decide if you need to answer the call on the phone.
- Your Reliable Life Assistant: Blood pressure monitoring for Women and Men adds a healthy lifestyle to your life, through the [FitCloudPro] App you can easily realize sedentary reminders, water reminders, menstrual cycle reminders, weather push, remote photo taking, find your phone, and set the alarm clock, making it a thoughtful assistant in your life.
New
Smart Watch for Women, Smartwatch for iPhone & Android Bluetooth (Answer/Call) Built-in Alexa, 1.91" HD Fitness Tracker with 105+ Sport Modes, IP68 Waterproof, Sleep/Heart Rate/SpO2/Stress Monitor
- 【BUILT-IN ALEXA & BLUETOOTH CALLING】This brand-new smart watch features an integrated Amazon Alexa voice assistant and supports Bluetooth calling. You can interact with the watch to check messages, play music, set reminders and manage your schedule, get weather and traffic updates, and more. It significantly reduces the need to rely on your phone(Sending SMS is not supported).
- 【PERSONALIZED DIAL & INNOVATIVE ROTATABLE CROWN】The IDW20 sports smartwatch features a 1.91-inch HD LCD touchscreen with high touch sensitivity and exceptional display quality. The app offers over 100 different watch face styles, along with customizable options to showcase your personality. The innovative rotating crown function allows you to easily switch between watch interfaces, significantly enhancing the convenience of using the watch!
- 【24/7 HEALTH MONITORING & ACTIVE ALERTS】This smartwatch for women men provides round-the-clock tracking of your steps, distance, and calories burned. Equipped with advanced high-precision sensors, it accurately monitors your heart rate, blood oxygen levels, sleep quality and stress in real time. The smart watch will actively alert you with a vibration if any of your metrics deviate from the norm during daily activities. It also provides reminders for drinking water, alarms, reaching fitness goals, and women's health notifications. Your health is in good hands with this smartwatch!
- 【ACTIVITY TRACKER & IP68 WATERPROOF】This fitness tracker supports over 100 popular sports modes, providing accurate and scientific data for a wide range of indoor and outdoor activities including running, cycling, swimming, baseball, basketball, fitness, yoga, strength training, and free workouts. With an IP68 waterproof rating, you can confidently use it while swimming, sweating, or washing your hands. It's the perfect companion for all fitness enthusiasts!
- 【SMART NOTIFICATIONS & VERSATILITY】Get real-time notifications for social media messages, emails, and texts directly on your wrist, ensuring you never miss important information even when your phone is out of reach. This smart wristwatch also includes practical daily features such as time display, weather forecast, music control, camera control, alarm settings, and phone finder. It’s an excellent companion for everyday life!
Our conclusion on the Fitbit Surge vs Polar M400
Both the Fitbit Surge and the Polar M400 are high quality products and we are sure you will be happy with either one. In the end it comes down to your budget and the value for money you are looking for.
Either way, the Fitbit Surge and the Polar M400 are both excellent products that will more than do their job!