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In this post, I’ll be comparing Fitbit Charge 4 vs Inspire HR. This is an interesting comparison simply because both smartbands have so many features in common with Charge 4 priced higher as a result of having more features than Inspire HR. As you may know, Charge 4 is the successor to Charge 3 and it did come with some new features like inbuilt GPS, Spotify music control, the new Active minutes, and NFC that supports Fitbit Pay. Compare the differences between these two to help decide which is right for you.

Fitbit Charge 4 vs Inspire HR Specifications Compared

  Fitbit Charge 4 Fitbit Inspire HR


Device name Fitbit Charge 4 Fitbit Inspire HR
Device type Sport/Fitness smartwatch Fitness Smartband
Predecessor Fitbit Charge 3 N/A
Successor N/A N/A
Date Released March, 2020 March, 2019
Gender Unisex Unisex



Display size 1.57 inch ~ 1.4 inch
Display type OLED (monochrome) grayscale OLED
Display resolution __ __
Pixel density -- --
Display always-on No No
Input type Touchscreen Touchscreen


Shape Rectangular/curved Rectangular/curved
Casing material Resin Aluminum
Strap material Elastomer Silicone
Bezel Material Resin __
Weight 27 g __
Color(s) Rosewood
Storm blue/black
Dimension 35.8 x 22.7 x 12.5 mm __
Strap size 140 - 180 mm (small)
180 - 220 mm (large)
Screen protection Hardened glass __
Durability test
Waterproof rating Yes, 5ATM Yes, 5ATM


Time/Date Yes Yes
Alarm Yes Yes
Stopwatch Yes Yes


RAM -- --
Internal storage __ __
Memory card slot __ __


Audio No No
Microphone No No
Loudspeaker No No
Camera No No
Music streaming No No


Bluetooth Bluetooth v4.0 LE Bluetooth v4.0 LE
NFC Yes No
Wi-Fi No No
Bluetooth calling No No


Calls alert Yes Yes
SMS alert Yes Yes
Email alert Yes Yes
Reminder Yes Yes


Network Technology No No


Steps Yes Yes
Distance Yes Yes
Calories Yes Yes
Floors climbed Yes No
Sleep tracking Yes Yes
Heart rate monitoring Yes Yes
VO2 Max. Yes Yes
Stress Yes Yes
Swim tracking Yes Yes
Menstrual cycle tracking Yes Yes
Blood pressure No No
ECG Tracking No No
Blood oxygen Yes No
Preloaded sport modes Yes, 20+ Yes, 15+


Operating system Fitbit OS Fitbit OS
CPU -- --
GPU -- --
Chipset -- --


GPS Yes No, (connected GPS)
Accelerometer Yes Yes
Gyroscope __ No
Heart rate sensor Yes Yes
Barometer Yes No
Compass No No
Pulse Ox. Yes No
Altimeter __ __
Thermometer No No
Ambient light No No


Interchangeable straps Yes Yes
Custom watch face Yes Yes
Voice Assistant No No
Compatibility Android 7.0+
iOS 12.2+
Check your device compatibility
Android, IOS

Check supported devices
Payment system Fitbit Pay No
Companion app Fitbit App Fitbit App


Battery type Non-removable lithium polymer Non-removable lithium polymer
Battery capacity _ _
Est. battery life Standby: 10 day+
Mixed usage: 7 days
Continuous GPS Tracking: 5 Hrs
Mixed usage: up to 5 days
Charging mode Charging Dock USB based charging dock
Charging duration About 1-2 hours About 1-2 hours


Fitbit Charge 4 Fitbit Inspire HR
Strap (small and large) Straps
Charger Magnetic charging dock
Quick start guide Quick start guide
  1. Design
  2. Both Inspire HR and Charge 4 spot a decent design that is lightweight, sleek, and comfortable to wear. Greyscale OLED powers the display on both devices which can be easily read. The body of both devices is also made with the plastic material while the straps are made from elastomer. Each of these two is also rated 5ATM which means waterproof up to 50 meters. Thus, it’s safe to wear any of these two to the shower or pool. In other words, I can say the design of both devices look good.

  3. Fitness Tracking
  4. Fitness tracking is where both devices differ even though similarities are more. Both Charge 4 and Inspire HR will track your steps, distance, sleep in three stages: (REM, deep and light), continuous heart rate, stress management through guided breathing session, menstrual cycle tracking with 20 preloaded sport modes.

    The difference though is the presence of inbuilt GPS in Charge 4 which Inspire HR lacks. Thus, with Charge 4, you can track outdoor activities without your phone, but you’ll need to carry your phone along if you’re to map your run with Inspire HR. You can then see a map of your run from the Fitbit App.

    Another feature present in Charge 4 is Active minutes which allows you to set a target heart rate and the device will alert you when the preset target is reached. The Charge 4 will also count floors climbed, a feature Inspire HR lacks.

    The bottom line, Charge 4 is a more comprehensive fitness tracker.

  5. Battery Life
  6. Fitbit Charge 4 has a longer battery life than Inspire HR. Users claimed that Charge 4 lasted an average of 5-6 days as against 4 days of Inspire HR. Please note that the actual battery life will vary by users.

  7. Smart Features

There are also some smart features present on Charge 4 which Inspire HR lacks. Although, each of these two will alert you when you receive a notification on your phone, but Charge 4 features the sleep mode that allows you mute notification while sleeping and do not disturb mode that allows you to mute notification during the day. Charge 4 also comes NFC that enables Fitbit Pay, a feature that allows you to make a payment from the device.

Which Should You Buy?

The bottom line, Charge 4 is better than Inspire HR. It has more fitness tracking and smart features and as a result, you’ll have to pay more for it.

However, Inspire HR is still a great choice. The only difference is that you’ll have to carry your phone along when tracking outdoor activities, it can’t count floors you climb and there’s no NFC, yet I think it’s still a wise investment for the price.


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