Last Updated & Fact Checked: March 21, 2026
Are you trying to decide between the Fitbit Flex and the Fitbit Flex 2?
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 Flex or the Fitbit Flex 2 – and find out exactly what the differences are.
Both the Fitbit Flex and the Fitbit Flex 2 are quality products, so read on to find out which one is best for your needs!
Fitbit Flex quick facts
Fitbit Flex 2 quick facts
Fitbit Flex product details
Bestseller No. 1
Fitbit Flex Wireless Activity + Sleep Wristband, Slate, Small/Large
- One syncs automatically and wirelessly to tablets, computers and 150 plus leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology. Syncing to computers requires Internet connection and USB port. Syncing to mobile devices requires Bluetooth and Internet connection. Syncing range: 20 feet. Call notifications via Bluetooth 4.0
- Water Resistance: Charge has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking Charge off before showering because, as with any wearable device, it’s best for your skin if the band stays dry and clean
- Warning: Do not use if you have a pacemaker or other internal, or implanted medical device. Not intended for use by children under 13. Always consult your physician. Slippery when wet
- We recommend charging your device every few days to ensure you are always tracking. Charge time: One to two hours. Battery life: up to 7 - 10 days. Battery type: Lithium-polymer
- Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices
Bestseller No. 2
Fitbit Inspire 3 Health &-Fitness-Tracker with Stress Management, Workout Intensity, Sleep Tracking, 24/7 Heart Rate and more, Midnight Zen/Black One Size (S & L Bands Included)
- Inspire 3 is the tracker that helps you find your energy, do what you love and feel your best. All you have to do is wear it.Operating temperature: 0° to 40°C
- Move more: Daily Readiness Score(1), Active Zone Minutes, all-day activity tracking and 24/7 heart rate, 20+ exercise modes, automatic exercise tracking and reminders to move
- Stress less: always-on wellness tracking, daily Stress Management Score, mindfulness sessions, relax breathing sessions, irregular heart rhythm notifications(2), SpO2(3), menstrual health tracking, resting heart rate and high/low heart rate notifications
- Sleep better: automatic sleep tracking, personalized Sleep Profile(1), daily detailed Sleep Score, smart wake vibrating alarm, sleep mode
- Comfortably connected day and night: calls, texts & smartphone app notifications(4), color touchscreen with customizable clock faces, super lightweight and water resistant to 50 meters, up to 10 day battery life(5)
Bestseller No. 3
Greeninsync Accessory Band for Flex 2 Fitbit, Replacement for Flex 2 Adjustable Sports Fitness Wristband Strap W/Metal Clasp and Fastener for Flex 2 Smart Watch Small Women Girl(3Pack)
- Unique design，anti-swing and special groove design inside the flex 2 fitness wristband with extra clear silicon fastener ring, double secure to prevent the end of the flex 2 wristband from sliding out
- 3 colors available, black, navy and gray. Personalize your flex 2 Soft wristband to fit your mood and outfits in daily life with this brand new color choices
- The flex 2 adjustable band is made of a flexible, durable material.
- Two sizes available, small size fits for 5.1"-7.0" wrist. Large size fits for 6.1"-8.5" wrist. Please choose the right size while placing replacement bands for flex 2
- Classic and Elegant bands will be one of most excellent gift for yourself, your family and friends
Fitbit Flex 2 product details
Bestseller No. 1
Fitbit Flex 2, Black (US Version), 1 Count
- Track steps, distance, calories burned and active minutes. LED display lights up to show progress toward your daily goal
- Ultra-thin, removable tracker hides in bands, pendants and bangles
- Swim proof for tracking, swimming, life proof for wear in the ocean, shower, pool and beyond
- SmartTrack automatically recognizes select workouts and records them to your Fitbit app
- Get call and text notifications on your wrist with unique vibration patterns and color-coded LED lights
Bestseller No. 2
EXMRAT Charger Cable for Fitbit Flex 2, USB Charger Charging Cable for Fitbit Flex 2 (2Pack, 30cm/1ft)
- Replacement Charger Cable For Fitbit Flex 2 (with Reset Button ), Not compatible with Fitbit Flex.
- Cable length : 30cm/1ft. Easy plug and charge..
- High Quality - Over Voltage Protection, Over Current Protection.
- Compact and Lightweight Design - Convenient for travelers and business users
- Package included: 2 x Fitbit Flex 2 charger ( watch was not included )
Bestseller No. 3
Greeninsync Compatible with Fitbit Bands for Flex 2, Adjustable Soft Silicone Sports with Fastener Clasp Fitness Replacement Wristband Strap for Fitbit Flex 2 Smart Watch Large(3Pack)
- Unique design，anti-swing and special groove design inside the flex 2 replacemet strap with extra clear silicon fastener ring, double secure to prevent the end of the flex 2 wristband from sliding out
- 3 colors available, black, navy and gray. Personalize your flex 2 classic band to fit your mood and outfits in daily life with this brand new color choices
- The flex 2 adjustable band is made of a flexible, durable material.
- Two sizes available, small size fits for 5.1"-7.0" wrist. Large size fits for 6.1"-8.5" wrist. Please choose the right size while placing flex 2 watch band
- Classic and Elegant bands will be one of most excellent gift for yourself, your family and friends
New products & alternatives to the Fitbit Flex and the Fitbit Flex 2
New
Smart Bracelet for Men Women, Health Activity Fitness Trackers, 24H Sleep Tracker, 24/7 Continuous Heart Rate/Blood Pressure/HRV/Stress Monitor, 170+ Sports Modes Smart Wristband with Free APP 2 Bands
- 【24/7 Continuous Health Tracking】Experience 24/7 continuous health tracking with SOUYIE fitness tracker. Advanced sensors and AI algorithms continuously monitor real-time heart rate, blood pressure, blood oxygen, heart rate variability, and stress levels day and night. Get comprehensive health insights through detailed trends and analysis reports on the companion app to understand your health status, prevent risks, and improve your health level—all on your wrist. (Note: The measurement results are for reference only and should not be used for any medical purposes or as a basis for diagnosis)
- 【All-Day Activity Tracking & 170+ Sports Modes】Maximize every workout with 170+ sports modes and 24/7 activity tracking. SOUYIE fitness tracker accurately monitors steps, distance, and calories burned all day to accelerate your goal achievement. Train smarter in 170+ activities including running, yoga, basketball, and skipping—plus 3 dedicated GPS modes (walking/running/cycling) for real-time route mapping. View real-time workout tracks on the app to analyze performance and optimize progress.
- 【Day and Night Sleep Tracking】Experience 24/7 sleep tracking with our newly upgraded health watch. Monitor your nighttime sleep and daytime naps for a comprehensive rest analysis. Get professional insights into your sleep stages (light, deep, REM), sleep duration, and awake time. Understand your unique sleeping patterns with detailed reports. Optimize your sleep, enhance recovery, and wake up refreshed—make smarter adjustments for truly restful nights.
- 【Instant Vibration Reminder】Stay seamlessly connected with intelligent vibration reminders. SOUYIE smart bracelet provides call, SMS, and app notification reminders (Whatsapp/Skype/Facebook) via Bluetooth sync. Gentle, private vibrations ensure only you feel alerts—no disruptive sounds. Never miss important messages in meetings, workouts, or quiet moments. Maintain focus without phone-checking while avoiding social awkwardness.
- 【18.4g Lightweight Body & Double Straps】Redefine lightness and comfort with the SOUYIE 18.4g smart bracelet. The stylish metal case is durable and exudes an elegant sheen, and comes with two straps (silicone and nylon) for a versatile look. The minimalist screenless design and ergonomically curved body bring an excellent all-day comfort experience whether you are exercising, sleeping or working.
New
Fitbit Inspire 3 Health & Fitness Tracker Bundle - with Stress Management, Workout Intensity, Sleep Tracking, 24/7 Heart + 2 Silicone Bands, 2 Screen Protectors, Cleaning Cloth & Fast Charger
- INSPIRED FITNESS: The Fitbit Inspire 3 is an all in one 24/7 fitness tracker. Track active minutes, fitness exercises, steps, distance, calories, skin temperature, sleep cycles and more. Help optimize your fitness and performance with this easy to use tracker.
- PREMIUM BUNDLE: The Fitbit Inspire 3 watch bundle includes - 1 Fitbit Inspire 3, 2 silicone replacement bands (small and large), 2 screen protectors, a cleaning cloth and fast charger. Unisex design is great for men and women of all ages and activity levels.
- WATER RESISTANT: Enjoy swim proof water resistant use up to 50 meters. Perfect for swimming and tracking laps in the pool or running and dancing in the rain. Full color touchscreen works when dry and when wet.
- STYLISH DESIGN: You'll love the stylish sleek look of the Fitbit Inspire 3. It looks great with all outfits and the low profile design won't get in the way while you work out, run, walk, swim or hike. The Fitbit Inspire 3 bands can be swapped out to mix and match different colors and band lengths.
- WORKS WITH YOUR PHONE: 10 day battery life keeps you connected longer than ever. Enjoy Smart Wake alarm, call, text and app notifications, find my phone, do not disturb and sleep modes. Even make purchases with Fitbit Pay. Works with Apple iOS 15 or higher and Android OS 9 or higher.
New
BSLIZHEN Fitness Tracker with 24/7 Blood Oxygen Heart Rate and Sleep Monitor,IP68 Waterproof,1.10''AMOLED Touch Color Screen,Step Counter Health Activity Trackers for Women Men (Black)
- 【24/7 Fitness Tracker】The fitness watch can measure your heart rate and blood oxygen in real time for 24 hours. Accurately tracks sleep status including: deep sleep/light sleep/awake and generate specific reports for your review. The smart watch adds a function for women to record their menstrual cycle to help them pay more attention to their health. In addition, drink reminder, sedentary reminder functions will help you develop good life habits.
- 【1.1" Color AMOLED Touch Screen】The fitness tracker shows a sleek curved design and features a 1.1" color AMOLED touch screen, enhancing your visual and operating experience. Choose from our extensive collection of over 70 cloud-based watch faces to personalize your device according to your preferences, mood, or outfit. Also, you can customize your favorite photos in the album as a unique dial to show your unique style and theme every day.
- 【All-day Activity Tracking 】The fitness tracker can automatically track your steps, distance and calories burned. Accurately record activities throughout the day and provide professional analysis to improve your sports and daily habits.
- 【Call and Message Notifications 】The watch can receive notifications of social software messages from mobile phones, including SMS, QQ, WeChat, WhatsApp, Facebook and Twitter, etc. You can also receive incoming call notifications and reject calls. so you never miss an important call or message.
- 【Long Battery Life 】The fitness watch uses magnetic fast charging to provide a better battery life experience. It takes 1-2 hours to fully charge and can be used up to 7 days of regular use and 15 days standby. Compatible mobile phone system: Android 5.0 (included) and iOS 9.0 (included) or above.
New
Fitness Tracker with 24/7 Heart Rate, Blood Oxygen, Sleep Tracker, 1.47''Waterproof Fitness Watch, Activity Tracker with Step Tracker for Women Men
- All-Day Activity Monitoring：The fitness tracker delivers round-the-clock activity tracking, encompassing daily step count, calories burned, exercise distance, and duration. This functionality empowers you to reach your fitness objectives with greater efficiency. Detailed analytics are accessible via the "Da fit" mobile application
- 24/7 Monitoring for Heart Rate, Body Temperature & Sleep: Equipped with the cutting-edge VC30F true blood oxygen and heart rate integrated circuit (IC), this fitness tracker delivers more precise dynamic heart rate monitoring. It features enhanced real-time body detection capabilities, minimizing false readings effectively
- 1.47-Inch Touchscreen Display: Boasting a 1.47-inch color touchscreen with an ultra-slim bezel design, the tracker offers an expanded screen-to-body ratio and sharper image clarity. Its robust stainless steel frame complements the skin-friendly fitness straps seamlessly, while the extensive selection of vibrant watch faces is guaranteed to catch the eye
- Smart Functions: The is packed with various intelligent features, including call and message reminders, remote photography, drink water reminders, sedentary reminders, female health tracking, family health management, alarm clock, stopwatch, and a find device function
- 100+ Sports Modes: Featuring over 100 sports modes, the watch provides data support for a wide array of physical activities, assisting you in monitoring your exercise performance and tracking your progress
New
Fitbit Inspire 2 Health & Fitness Tracker with 24/7 Heart Rate, Black (Renewed)
- Get call, text, calendar and smartphone app notifications right on your wrist. Notifications and app alerts are available on-device when your phone is nearby
- Earn active zone minutes as you progress toward your weekly 150 minutes of heart-pumping activity and use 20+ exercise modes to track goals like distance, calories burned and more
- Track all-day activity: your steps, distance, hourly activity and calories burned
- Use 24/7 heart rate to track resting heart rate better measure calorie burn
- Enjoy 10 days of battery life for daily progress without constant charging varies with use and other factors
Our conclusion on the Fitbit Flex vs Fitbit Flex 2
Both the Fitbit Flex and the Fitbit Flex 2 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 Flex and the Fitbit Flex 2 are both excellent products that will more than do their job!