Fitbit Charge 5 Review: Still Good in 2024? Vs Charge 6

If you’ve been wearing a Fitbit Charge 5 for a few years, you might have noticed the numbers on screen don’t always match what you feel during a tough spin class. That’s not just you—it’s the sensor catching up with you. With the Charge 6 now on shelves, and reviews consistently highlighting a major heart-rate accuracy leap, buyers and upgraders alike face a sharper decision than they did back in 2021. This guide cuts through the specs to help you decide whether the Charge 5 still holds up or whether the grass is genuinely greener with its successor.

Battery Life: Up to 7 days ·
Water Resistance: Up to 50m ·
iOS Compatibility: 15 or higher ·
Android Compatibility: OS 9.0 or higher ·
Heart Rate Tracking: 24/7 with PurePulse

Is the Fitbit Charge 5 still good?

Three years after its 2021 debut, the Fitbit Charge 5 remains a capable fitness tracker—and the numbers reflect that. Its PurePulse heart rate sensor tracks continuously around the clock, and the 50-meter water resistance handles swims without issue. Battery life still stretches to a full week, meaning you won’t be hunting for a charger every other day.

Key features recap

• 24/7 PurePulse heart rate monitoring with high/low heart rate notifications
• ECG app for on-wrist atrial fibrillation assessment (Android Central)
• Active Zone Minutes targeting 150 weekly minutes in heart rate zones
• SpO2, EDA stress sensing, HRV, skin temperature, and breathing rate tracking at night
• AMOLED color display with always-on mode

Current performance in 2024

For everyday activity tracking—steps, sleep, basic workouts—the Charge 5 holds its own. Reviewers at Business Insider still call it a solid choice for users who don’t need the fastest sync or GPS accuracy. The catch is that fitness-focused buyers increasingly compare these trackers against chest straps and smartwatch benchmarks—and there, the Charge 5’s age shows.

What’s the difference between the Fitbit Charge 5 and 6?

The headline difference is accuracy. Fitbit claims the Charge 6’s heart rate sensor is 60% more accurate than the Charge 5—a figure Tom’s Guide verified across multiple workout types. The Charge 6 borrows machine learning algorithms from the Google Pixel Watch to better handle arm-active sports where wrist-based sensors typically struggle.

Design and display

Both trackers share the same AMOLED color display and waterproof build, but the Charge 6 adds a physical side button—a small change that makes navigating menus significantly faster. Charge 5 users swipe-only interaction, so this upgrade feels like relief for anyone who found the touchscreen finicky mid-workout.

The table below breaks down how the two models differ on key design and hardware elements.

The implication: the physical button alone won’t justify the price jump for most users, but it removes one of the Charge 5’s most frequent friction points during exercise.

Health sensors

On paper, the sensor suites look identical: HRM, SpO2, ECG, EDA, skin temperature, ambient light, accelerometer, vibration, and NFC all appear on both models. But firmware and processing differences matter. Android Central notes that both devices detect atrial fibrillation passively, send irregular heart rate notifications, and track HRV at night. The real edge lies in how cleanly the Charge 6 captures data during high-intensity intervals.

Fitness tracking

Sports modes tell the story quickly. The Charge 6 offers over 40 modes versus roughly 20 on the Charge 5—a difference of 20 new workout types including HIIT, CrossFit, skiing, core workouts, and dancing. For gym-goers who mix routines, that expansion is concrete, not cosmetic. Bandletic testing found the Charge 6 heart rate accuracy close to the Polar H10 chest strap even during fast-twitch intervals, while the Charge 5 trailed noticeably.

Is it worth upgrading from Fitbit Charge 5 to 6?

The upgrade math depends on how you use your tracker. Woman&Home specifically recommends the Charge 6 for anyone prioritizing accurate heart rate data during workouts. At roughly $60 more, you’re paying for precision and ecosystem features, not a dramatically different look.

Upgrade pros

• 60% heart rate accuracy improvement validated across multiple reviews
• Heart rate broadcasting to Peloton, NordicTrack, Tonal, Zwift, iFit—none available on Charge 5
• 20 additional workout modes for diverse training routines
• Physical button eliminates touchscreen frustration mid-exercise
• Faster, more reliable syncing with connected apps
• Google Wallet and YouTube Music add everyday convenience

What this means: for athletes and fitness enthusiasts who rely on heart rate data during structured workouts, the Charge 6’s accuracy gains directly translate into better training decisions.

When to stick with Charge 5

• Battery life matches the Charge 6 at up to 7 days—no endurance trade-off
• Core features—ECG, AFib detection, sleep stages, Active Zone Minutes—identical
• Fitbit Pay still works for contactless purchases in supported regions
• If you’re on a tight budget and your workouts stay moderate

What this means: for casual users whose training stays within moderate intensity, the Charge 5 delivers nearly everything the Charge 6 offers—at a significantly lower price.

Does a Fitbit measure atrial fibrillation?

Both the Charge 5 and Charge 6 include ECG sensors capable of assessing heart rhythm for atrial fibrillation on the wrist. Android Central confirms passive AFib detection on both models—this isn’t a Charge 6 exclusive feature. You can run an ECG reading on demand and receive notifications if an irregular rhythm is detected while you sleep.

AFib detection capabilities

The “30-second rule” in atrial fibrillation refers to how long an irregular rhythm must persist before a Fitbit flags it. Both trackers monitor continuously rather than waiting for a manual ECG tap, which means they catch episodic irregularity even if you’re not thinking about your heart. The distinction is important: Fitbit provides screening data, not a clinical diagnosis. Any reading that concerns you should go to a physician.

30-second rule explanation

Medically, AFib episodes lasting under 30 seconds often resolve on their own and may not require intervention. Fitbit’s detection system looks for sustained patterns rather than momentary spikes—which is why the algorithm matters as much as the sensor. Business Insider notes that the Charge 6’s improved processing may make its AFib flagging more consistent during high-heart-rate workouts, though both devices share the same underlying sensor technology.

Do cardiologists recommend Fitbit?

Cardiologists and fitness professionals increasingly acknowledge wrist-based heart rate monitoring as a useful screening layer—not a replacement for clinical tools. Business Insider notes that the Charge 6 rivals Apple and Garmin for accuracy in heart rate, sleep, and step tracking, which raises its profile among practitioners who want data their patients can actually act on.

Heart health tracking validation

The 24/7 heart rate monitoring, HRV tracking, and nighttime breathing rate data give physicians a longitudinal view that a single clinic visit can’t provide. For patients with known AFib risk factors—age, hypertension, family history—having a device that logs every irregular event for review has genuine clinical value. The key caveat remains data interpretation: a cardiologist reading your Fitbit export sees patterns, not diagnoses.

Smartwatch for heart issues

If you have existing heart conditions, the question isn’t whether to wear a tracker—it’s which one gives your doctor the cleanest data. For that use case, the Charge 6’s improved accuracy during workouts matters: erratic readings from the Charge 5 during intense intervals could create artifacts that confuse algorithmic AFib detection. Better signal quality means fewer false flags and more trustworthy logs to share with your care team.

Fitbit Charge 5 vs Charge 6: Specs compared

Eight key areas where these trackers diverge paint a clear picture for anyone deciding between them.

The pattern: the Charge 6’s improvements concentrate in three areas—heart rate precision, ecosystem connectivity, and navigation speed—with everything else remaining functionally identical to the Charge 5.

“Fitbit also said they made the heart rate sensor 60% more accurate on the Charge 6, saying it is better than any heart rate sensor on any of its previous fitness trackers.”

— Fitbit (Tom’s Guide product review)

“The Charge 6 is impressively accurate in measuring heart rate, sleep stages, and step counts, rivaling more expensive wearables from Apple and Garmin.”

— Business Insider (Best Fitbit review)

“In fact, this model has the most accurate heart rate tracking across Fitbit’s lineup, especially during fast-paced interval training.”

— Business Insider (Best Fitbit review)

For buyers weighing the Charge 5 against its successor, the decision framework is straightforward: if precision during workouts and ecosystem integration matter, the Charge 6 justifies the premium. If your needs center on daily activity tracking, sleep monitoring, and casual fitness with a longer battery window between charges, the Charge 5 remains a sensible purchase at a lower price point. Cardiologists reviewing patient data will appreciate the Charge 6’s cleaner signal during high-intensity sessions, while routine users with no history of heart rhythm concerns will find everything they need in either device.