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Which is better between Fitbit Ionic vs Charge 4? I think Ionic is a better smartwatch, but Charge 4 is a better choice if you need a cheaper fitness companion

The Charge 4 is the latest fitness tracking device from Fitbit, it succeeds the Charge 3, and now comes with inbuilt GPS, NFC and music control as well as being a complete fitness tracker. Sams can be said about the Ionic released in 2017, but still one of the best sellers on the market. In this post, I compare the Ionic vs Charge 4 to find the differences and to help you decide which is a better bargain.

Meanwhile compare the specs of the Charge 4 vs Ionic to see the differences, further down, you’ll see the similar features as well as the differences.

Fitbit Ionic vs Charge 4: Specifications

  Fitbit Ionic Fitbit Charge 4
fitbit ionic specs


Device name Fitbit Ionic Fitbit Charge 4
Device type Sport/Fitness smartwatch Sport/Fitness smartwatch
Predecessor Fitbit Charge 3
Successor N/A
Date Released August, 2017 March, 2020
Gender Unisex Unisex



Display size 1.42 inch 1.57 inch
Display type LCD OLED (monochrome)
Display resolution 348 x 250 pixel __
Pixel density 306 ppi --
Display always-on Yes No
Input type Touchscreen
3 buttons


Shape Rectangular/curved Rectangular/curved
Casing material Aerospace-grade aluminium Resin
Strap material Elastomer Elastomer
Bezel Material Aluminum Resin
Weight 30g 27 g
Color(s) Charcoal/smoke grey
Blue/burnt orange
Storm blue/black
Dimension 38 x 45 x 12 mm 35.8 x 22.7 x 12.5 mm
Strap size 140 - 180 mm (small)
180 - 220 mm (large)
140 - 180 mm (small)
180 - 220 mm (large)
Screen protection Corning Gorilla glass 3 Hardened glass
Durability test
Waterproof rating Yes, 5ATM Yes, 5ATM


Time/Date Yes Yes
Alarm Yes Yes
Stopwatch Yes Yes


RAM -- --
Internal storage 4GB (2.5GB available) __
Memory card slot No __


Audio mp3/mp4 No
Microphone No No
Loudspeaker No No
Camera No No
Music streaming Yes No


Bluetooth Bluetooth v4.0 LE Bluetooth v4.0 LE
NFC Yes Yes
Wi-Fi Yes 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 Yes
Sleep tracking Yes Yes
Heart rate monitoring Yes Yes
VO2 Max. Yes Yes
Stress Yes Yes
Swim tracking No Yes
Menstrual cycle tracking Yes Yes
Blood pressure No No
ECG Tracking No No
Blood oxygen No Yes
Preloaded sport modes Yes Yes, 20+


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


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


Interchangeable straps Yes Yes
Custom watch face Yes Yes
Voice Assistant No No
Compatibility Android, IOS

Check supported devices
Android 7.0+
iOS 12.2+
Check your device compatibility
Payment system Fitbit Pay Fitbit Pay
Companion app Fitbit App Fitbit App


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


Fitbit Ionic Fitbit Charge 4
Strap (small and large) Strap (small and large)
Magnetic charging dock Charger
Quick start guide Quick start guide

Fitbit Charge 4/Ionic Similar Features

The list below shows all the features similar to both the Ionic and Charge 4.

  1. Inbuilt GPS
  2. Inbuilt GPS lets you see your real-time pace and distance without a phone, then get a map of your route in the Fitbit app.

  3. Personalised Reminders
  4. Stay on track toward your goals with personalized reminders that remind you to stay active, get hydrated, stick to a sleep schedule, and more.

  5. Automatic Exercise Recognition
  6. Automatically record select exercises like running, biking, and more & see detailed workout information in the Fitbit app.

  7. 20+ Preloaded Sport Modes
  8. Choose from 20+ exercise modes like run, bike, swim, yoga, and more, set a goal, and get real-time stats during your workouts.

  9. Personalised Insights
  10. Get insights based on your personal stats and specific guidance on how to improve.

  11. Swimproof
  12. Water-resistant up to 50M, so you can wear your tracker or smartwatch in the shower, pool, and beyond.

  13. Sedentary Reminders
  14. See how long you’ve been active throughout the day and get reminders to fit in a few extra steps when you’ve been sitting a bit too long.

  15. Workout Intensity Map
  16. After outdoor exercise, check your workout intensity map in the Fitbit app to see your heart rate zones throughout your route.

  17. Heart Rate Zones
  18. Use your personalized fat burn, cardio, and peak heart rate zones to optimize your effort during workouts.

  19. Advanced Sleep Tools
  20. Unlock a Sleep Score breakdown and personalized tools to help you sleep better.

  21. Guided Programs
  22. Follow customized, step-by-step programs that help you build healthier habits in key areas.

  23. Health and Fitness Tracking
  24. Track activity, weight, sleep, and nutrition and see your progress in the app.

  25. Cardio Fitness Score
  26. Get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score.

  27. Comprehensive Sleep Tracking for Light, Deep and REM Stages
  28. See your time spent in light, deep, and REM sleep stages and get sleep insights to help you improve.

  29. Female Health Tracking
  30. Know your body on a deeper level using your tracker or smartwatch with the Fitbit app to follow your cycle, record symptoms, and more.

  31. Guilded Breathing Sessions Help You Manage Stress
  32. Find moments of calm throughout your day with personalized breathing sessions based on your heart rate.

  33. All Day Heart Rate Tracking
  34. Use 24/7 heart rate to better track calorie burn, see your resting heart rate trends, and get real-time guidance to optimize your workouts.

  35. All Day Activity Tracking
  36. Track steps, distance, calories burned, active minutes, hourly activity, and stationary time.

  37. Sleep Score
  38. Based on your heart rate, time asleep, and restlessness, this personalized score helps you better understand your sleep quality each night.

  39. Sleep Tracking
  40. Understand your rest with automatic sleep tracking and silent alarms on your wrist & bedtime reminders and helpful tips in the app.

  41. Resting Heart Rate
  42. Wear your tracker or smartwatch all day and night to record your resting heart rate and track heart rate over time.

  43. All Day Calorie Burn
  44. Better understand the total number of calories you burn—all day and during workouts—to manage your weight and stay on track toward your goals.

  45. Syncs Wirelessly With Compatible Devices
  46. Automatically sync to most popular iOS and Android devices to show your stats, trends, and progress on your Fitbit dashboard.

  47. Make Payments Directly From Watch
  48. Use your credit and debit cards to make secure purchases anywhere that accepts tap-and-pay. See participating banks.

  49. Smartphone Notifications
  50. See call, text, or calendar notifications on screen & get push notifications from smartphone apps. Available when your phone is nearby.

  51. Connect and Control Music on Spotify
  52. Control your music, “like” songs, and browse recent playlists and podcasts all from your wrist. Works with phones nearby; Spotify Premium subscription required. Not available in all countries.

  53. App Dashboard
  54. Set goals, track progress, and get a more complete picture of your health and fitness—all on your dashboard in the Fitbit app.

  55. Sleep Mode
  56. Use the sleep mode to mute smartphone notifications and stop your screen from turning on at night.

  57. Do Not Disturb Mode
  58. Use do not disturb mode when you want to mute call, text, calendar, and app notifications during the day.

  59. On-Wrist Stats

Check your stats on your Fitbit tracker or smartwatch—and get the nudge you need to reach your goals.

Fitbit Ionic vs Charge 4: Differences

Fitbit Ionic

Fitbit Charge 4


Colored LCD upto 1000nits

Monochrome LCD
Store and Play Music

Yes, up to 300 tracks


Control Music on Spotify



Connect with Wireless Headphone
Listen to your favorite tunes without the wires.



Active Zone Minutes
Feel a buzz when you reach your target heart rate zones during exercise and celebrate when you earn extra minutes outside of workouts.



Real-Time Pace and Distance Using Phone GPS
See your real-time pace and distance by connecting to your phone's GPS, then get a map of your route in the Fitbit app.



On-Screen Workout
Get personalized on-screen workouts that play on your wrist, coach you through each move and adapt based on your feedback.



Real-time Pace and Distance


Inbuilt GPS

Battery life

5 days

7 days+

Editor's Rating

Which Should You Buy?

First of all, it’s important to state that from the design, features, and otherwise, the Ionic is a more comprehensive smartwatch (if I can also call the Charge 4 a smartwatch, though looks more like a smartband). The Ionic is of a higher quality which you can see from the design. While it has a more durable aluminum case and Corning Gorilla Glass 3, Charge 4 case is made of resin. Similarly, it also has a brighter and more colorful LCD display compared to the monochrome LCD of Charge 4. In other words, I think it’s right to say that the Ionic is a better smartwatch with more features like music storage and up to 5 days long battery life

Charge 4, on the other hand, is way cheaper, yet has lots of fitness tracking features in addition to the newly added Active Zone Minutes that allow you set target heart rate and has up to 7 days long battery life that allows you go longer from a single charge. I conclude by saying that, Charge 4 is better choice for you if you need a cheaper fitness companion.

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