Fitbit Ionic Review – Freedom While Training

At a Glance: Quick Ratings

Heart Rate Functions


Fitness / Sport Features


Ease of Use


Battery Life


Where To Get It

A Deep Dive Into Fitbit Ionic

Fitbit have had a turbulent time over the last 6 months of 2021. Competition from Apple, Xiaomi and Garmin has been relentless.

To get through 2021 and regain their fitness band throne in 2021 Fitbit needed to pull something magic from their marketing bag. It looks like they could have done it.

The new Fitbit Ionic could well be the strongest alternative to the Apple Watch V3. The Fitbit Ionic fitness smartwatch has been reviewed by Tristan Haskins aka CardioCritic

  • Who Is It For?

  • Video Review

If you have been considering an Apple Watch, Garmin Vivoactive HR, Polar M600, Moto 360, Samsung Gear or any other sports focused smartwatch then the Ionic could be for you.

The Ionic is seriously focused on monitoring and improving fitness. 24/7 heart rate tracking, cardio fitness level tracking, and built-in GPS – it’s all covered by the Ionic.

Everything has been considered from the crisp graphics amplified by 1000 nits and a scratch-proof Gorilla Glass 3 to personalized coaching plans.

Fitbit had one product missing from their product range. The essential design brief for this missing link would have gone something like this

  • Integrated GPS
  • Wrist Based Heart Rate
  • 3 or 4 day battery life
  • Genuine smartwatch functionality including App support
  • Internal Music store (with Bluetooth connection)

And that’s where the Fitbit Ionic comes in. It comes complete with the integrated GPS and genuine smartwatch functionality courtesy of Fitbit’s development platform no(Fitbit SDK).

A very practical battery life offering 3 or 4 days wear with up to 10 hours of GPS training time (this will impact overall battery life).

For those looking for further freedom from their smartphone while training the Ionic also has the ability to store up to 30o songs on it’s 2.5GB of internal memory, 

Main Features and Functions

Fitbit Coach: This is a key feature of the Ionic – your own personal trainer. Adaptable dynamic workouts that provide onscreen workout advice personalised to your likes and feedback.

Running companion: Your Ionic will automatically track when you run. Run Detect is a clever feature that automatically starts GPS tracking. The timer can also be set to auto-pause when you have to stop for a breather or traffic etc.

Swim mode: This is Fitbit’s first fully swim proof watch being water resistance up to 50 meters. Internal sensors will count your laps and provide real-time feedback on laps, duration and calories burned for pool swims.

GLONASS & GPS: Get better performance tracking with the integrated antenna providing a stronger connection to both GPS and GLONASS satellites

Wrist Based Heart Rate: The Ionic utilizes Fitbit’s enhanced PurePulse® heart rate sensors technology providing greater accuracy during exercises. You’ll also have access to real-time heart rate zones clearing identifying your training intensity. Finally the Ionic provides 24/7 heart rate tracking to help better understand your recovery status (Resting HR remains elevated for several hours / days following intense exercise).

SpO2 Sensor technology: This is  feature CardioCritic are keen to test. Fitbit use a relative SpO2 sensor for estimating blood oxygen levels in a similar way to a pulse oximeter.  This new feature has the potential for tracking / controlling vital health indicators such as sleep apnea and asthma.

Internal Music: Exercising with music is motivational and fun. The Ionic features 2.5GB of internal storage providing enough space for up to 300+ songs.

Make use of  the popular Pandora Plus music streaming service. It is possible to sync your favorite stations or curated workout stations to the Ionic.

Listen  to your favorite music ad-free and offline—all from your wrist, leaving your phone at home. Music is transmitted to any Bluetooth connected headphones or the Fitbit Flyer headphones.

Make Payments: Currently this feature only applies to customers in the US. There is no doubt the list of financial establishments supporting it will grow over the next few months.

The internal NFC chip lets you leave your wallet and phone at home. Swiping your Ionic across a contactless payment terminal will complete the secure and hassle free transaction.

Smart Notifications: With extended smartphone notifications, receive call, text and calendar alerts, as well as notifications from apps on your smartphone like Facebook, Gmail, Instagram, Slack, Snapchat and more.

Extended battery life: Something that really lets down sports based wearables like the Moto 360 and Samsung Gear is their limited batter life, not much more than a day in some cases. The Ionic addresses this failure with a solid 4+ day battery life on a single charge (10 hours with GPS or playing music).

Further tests of the real-world battery life are required. Initial reaction is that 3 days with 1-2 hours GPS training data should be possible …. more to come.

In addition to these new features, Ionic has everything you love about Fitbit – automatically track your steps, calories, floors climbed and sleep stages, see your cardio fitness level (estimated VO2 Max), maintain moments of calm and more. Read more about everything Ionic has to offer here.

Summary of Ionic Features

More Features

Customization & Styles

Fitbit Apps, OS and SDK

Fitbit App

Detailed Activity Review

The Fitbit App only gets better and improves in parallel with the Fitbit fitness trackers. A large portion of the Fitbit Ionic customers will be serious runners.

The Ionic and Fitbit App provide a very detailed summary of each exercise clearly showing GPS route, heart rate data, calories burnt and automatic lap summaries.

The heart rate data includes a breakdown of time spent in each of the 3 x Heart Rate zones (Peak, Cardio and Fat Burn). A useful feature is the breakdown of steps and calories burnt during the exercise and how they contribute towards your daily goal.

Advanced Sleep Tracking

Fitbit go a step further with their sleep tracking than other leading fitness monitors. The Ionic breaks sleep down in to 4 categories. Awake, REM (dreaming), Light and Deep.

The Fitbit APP illustrates the nightly sleep pattern with an easy to understand graph showing periods of time spent in each sleep zone.

Top Alternatives

Next Model DOWN

The Fitbit Blaze is was awarded 4.5/5 Stars when originally reviewed in early 2021. The Blaze is a stylish & sleek fitness band with a clear & bright colour display, wrist based heart rate, connected GPS and comprehensive smartphone connectivity.

Closest Alternative Fitness Trackers

The Ionic is going to be HUGELY popular, there is no doubting that and it looks to be justly deserved success. The best alternatives to this sporty smartwatch are the Garmin Vivoactive HR (and the new Garmin Vivoactive 3), Polar M600 and Apple Watch.

All three of these alternatives include built-in GPS, wrist based heart rate and support of Apps via various platforms (Android Wear, iOs and Garmin IQ Connect) The Polar M600 supports over 100 different sport profiles and also includes built-in music store via Google Music.

  • Garmin Vivoactive HR
  • Polar M600
  • Apple Watch

If you want your activity tracker to include built-in GPS & wrist based heart rate but remain SLEEK & DISCRETE then Garmin could have the answer … they have just released their new Garmin Vivosport fitness tracker.

Replacing the Vivosmart HR+, the Garmin Vivosport features built-in GPS, wrist based heart rate, dedicated running functions (auto-lap, pace alerts etc) a full colour display, VO2 max, Stress tests and much more. CardioCritic have awarded the Garmin Vivosport Best on Test in the Fitness Tracker category and expect it to be one of the best selling fitness trackers of 2021.

  • Garmin Vivosport Best on Test – a sleek, discrete fitness tracker with GPS and wrist based heart rate

Fitbit Ionic Images

Latest Prices

Andrew Wyatt

Andrew Wyatt

Andrew Wyatt has been a tech geek for as long as he can remember. Whether it's laptops, cameras, or projects, he's obsessed with it all. When he's not researching the latest tech products, he likes to go on long hikes with his dogs.

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