Fitbit is no doubt one of the biggest names as far as the smartwatch and fitness industry is concerned. The brand has successfully carved out a niche for themselves with many of their devices like Versa 3, Sense, Versa 2, Inspire HR, Charge 3, and 4 being very popular among fitness enthusiasts. For those who don’t want the extra features that come with the full-fledged Fitbit smartwatches, their smartband is a decent alternative, and in that regard, the Inspire 2 and Charge 4 which are some of the latest from Fitbit comes to mind. These two have a lot of features in common, although Charge 4 is a more comprehensive fitness tracker, it comes with inbuilt GPS, altimeter, Spo2 measurements, and the ability to control your Spotify playlist on your phone. So which is right for you? Read further to compare the specs and features.
Fitbit Inspire 2 vs Charge 4 Full Specs Compared
|Fitbit Inspire 2||Fitbit Charge 4|
|Device name||Fitbit Inspire 2||Fitbit Charge 4|
|Device type||Fitness Smartband||Sport/Fitness smartwatch|
|Predessesor||Fitbit Inspire||Fitbit Charge 3|
|Successor||Fitbit Inspire 3||Fitbit Charge 5|
|Released date||September, 2020||March, 2020|
|Display type||Monochrome OLED||OLED (monochrome)|
|Display size||~ 1.4 inch||1.57 inch|
|Display resolution||126 x 36 px||100 x 160 pixels|
|Pixel density||93.6 PPI||120.2 PPI|
|Customizable watch face||Yes||Yes|
|Dimension||37.3 x 16.7 x 12.7 mm||35.8 x 22.7 x 12.5 mm|
|Casing material||Plastic Resin||Resin|
|Strap size||140 - 180 mm (small)|
180 - 220 mm (large)
|140 - 180 mm (small)|
180 - 220 mm (large)
|Screen protection||Corning Gorilla Glass||Hardened Glass|
|Water resistant/Protection||Yes, 5ATM||Yes, 5ATM|
|Swim-proof||Yes, recommended||Yes, recommended|
|Memory card slot||No||No|
|Bluetooth||Bluetooth v4.0 LE||Bluetooth v4.0 LE|
|Payment system||No||Fitbit Pay|
|GPS||No, (connected GPS)||Yes|
|Text response||No||Yes (Android only)|
|Heart rate monitoring||Yes||Yes|
|Menstrual cycle tracking||Yes||Yes|
|Under-water heart rate tracking||No||No|
|On-screen workout modes||No||No|
|Preloaded sport modes||Yes, 20||Yes, 20+|
|Operating system (OS)||Fitbit OS||Fitbit OS|
|Type of battery||Non-removable lithium polymer||Non-removable lithium polymer|
|Battery life||Mixed usage: up to 10 days||Standby: 10 day+|
Mixed usage: 7 days
Continuous GPS Tracking: 5 Hrs
|Charging type||USB based charging dock||Charging Dock|
|Charging time||About 1-30 mins||About 1-2 hours|
|Battery saver mode||No||No|
|Compatibility||Android 8.0+, IOS 14.0+ |
Check supported devices
Check your device compatibility
|Companion app||Fitbit App||Fitbit App|
|Fitbit Inspire 2||Fitbit Charge 4|
|Straps||Strap (small and large)|
|Quick start guide||Quick start guide|
|NOTE: We can't guarantee that all the information on this table are 100% correct. Read full disclaimer. Please, report an error.|
|Official Site||Official Site|
Fitbit Inspire vs Inspire HR vs Inspire 2 Features Compared
|Features||Inspire 2||Charge 4|
|Display||Greyscale OLED||Monochrome OLED|
Just glance to see what you need during workouts or when your hands are full. (will require frequent charging)
Automatically sync to most popular iOS and Android devices to show your stats, trends and progress on your Fitbit dashboard.
|Amazon Alexa Voice Assistant|
Check the weather, set timers, control your smart home devices, and more, powered by Amazon Alexa. Amazon Alexa not available in all countries
|Google Voice Assistant|
Check the weather, set timers, control your smart home devices, and more, powered by Google Voice.
Store and play 300+ songs on your smartwatch—plus download your favorite Pandora stations or Deezer playlists. Paid subscriptions required. Pandora is US only.
Use your credit and debit cards to make secure purchases anywhere that accepts tap-and-pay.See participating banks
See call, text, or calendar notifications on screen & get push notifications from smartphone apps.
|Connect With Wireless Headphones|
Listen to your favorite tunes without the wires.
|Connect and Control Music on Spotify|
Control your music, songs, and browse recent playlists and podcasts all from your wrist. Works with phone nearby; Spotify Premium subscription required. Not available in all countries.
Use the sleep mode to mute smartphone notifications and stop your screen from turning on at night.
|Do Not Disturb Mode|
Use do not disturb mode when you want to mute call, text, calendar, and app notifications during the day.
|Access Apps On Watch|
Access your favorite apps for fitness, sports, news, travel, transit, and more with a simple tap.
|Loudspeaker and Microphone|
Has a loudspeaker that allows you to play music aloud and as well make and receive calls via Bluetooth connection to the phone.
|Real-Time Using Built In GPS|
See your real-time pace and distance without a phone, then get a map of your route in the Fitbit app.
|Real-Time 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.
|Workout Intensity Map|
After outdoor exercise, check your workout intensity map in the Fitbit app to see your heart rate zones throughout your route.
|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.
Calculates active minutes through metabolic equivalents (METs). This metric, which factors in your body mass, is used to estimate exercise intensity.
Stay on track toward your goals with personalized reminders that remind you to stay active, get hydrated, stick to a sleep schedule and more.
|SmartTrack Exercise Recognition|
Automatically record select exercises like running, biking and more & see detailed workout information in the Fitbit app.
|20 Preset Workout Modes|
Choose from 20+ exercise modes like run, bike, swim, yoga and more, set a goal, and get real-time stats during your workouts.
Water-resistant up to 50M, so you can wear your tracker or smartwatch in the shower, pool, and beyond.
|Onscreen Workout Coach|
Get personalized on-screen workouts that play on your wrist, coach you through each move and adapt based on your feedback.
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.
|See Your Heart Rate Zones|
Use your personalized fat burn, cardio, and peak heart rate zones to optimize your effort during workouts.
|EDA Scan App|
The on-wrist EDA Scan app detects electrodermal activity—which may indicate your body’s response to stress—and reveals a graph in the Fitbit app to illuminate it.
Monitors your heart rate and can help you detect irregular heart rhythms which can lead to AFib is left untreated
|Cardio Fitness Score (VO2 Max.)|
Get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score.
|Complete Sleep Tracking|
See your time spent in light, deep and REM sleep stages and get sleep insights to help you improve. https://www.fitbit.com/us/technology
|Female Health Tracking|
Know your body on a deeper level using your tracker or smartwatch with the Fitbit app to follow your cycle, record symptoms and more.
|Guided Breathing Session|
Find moments of calm throughout your day with personalized breathing sessions based on your heart rate.
Allows you to see how well your blood utilizes oxygen.
|24/7 Heart Rate Tracking|
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.
|Resting Heart Rate|
Wear your tracker or smartwatch all day and night to record your resting heart rate and track heart rate over time.
|24/7 Activity Tracking|
Track steps, distance, calories burned, active minutes, hourly activity, and stationary time.
Counts floors climbed
Based on your heart rate, time asleep and restlessness, this personalized score helps you better understand your sleep quality each night.
Understand your rest with automatic sleep tracking and silent alarms on your wrist & bedtime reminders and helpful tips in the app.
|All Day Calorie Burn|
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.
|Battery Life||10 days||7 days|
So, which is righht for you?
Fitbit Charge 4 is obviously a better fitness tracking device. It has a larger display that allows you to see more at a glance, it has inbuilt GPS that means you can track your outdoor activities without having to carry your phone along. It also features an altimeter that enables it to count floors climbed, and there is SpO2 tracking that allows you to see your blood oxygen level when you sleep and wake up with the Charge 4. You can also control the Spotify playlist on your phone with Charge 4 – all of which Inspire 2 lacks.
However, Inspire 2 is still a decent fitness tracker. It’s a cheaper alternative, yet equipped to track your heart rate, sleep, steps, all-day calorie burn, and more. It also features preloaded sport modes and Active Zone Minutes which was introduced with Charge 4. Active Zone Minutes can be very helpful in helping you maintain a fitness goal. Moreover, Inspire 2 has a longer battery life than Charge 4, and with connected GPS to your phone, it allows you to track outdoor activities.
So, in conclusion, if you want more activity-tracking features, then Charge 4 is a better choice. Otherwise, Inspire 2 is a decent alternative if you’re tight on budget.