Best Fitness Trackers of 2018: Fitbit, Garmin, and More Reviewed — The Ultimate Buyer’s Guide

One-line verdict: 2018 was a landmark year for fitness wearables — whether you’re a casual step-counter or a hardcore endurance athlete, the lineup from Fitbit, Garmin, and their competitors delivered something genuinely useful for every lifestyle and budget.

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Overview

By 2018, the fitness tracker market had matured dramatically. Gone were the days of clunky rubber bands that did little more than count your steps with questionable accuracy. The wearables of 2018 were sophisticated health companions capable of tracking heart rate 24/7, monitoring sleep stages, logging GPS routes, and even offering guided breathing exercises. The question was no longer should you buy a fitness tracker — it was which one was right for you.

This roundup covers the most notable fitness trackers of 2018, with deep dives into the Fitbit Charge 3, Fitbit Versa, Garmin Vivosmart 4, Garmin Forerunner 935, and the Xiaomi Mi Band 3 as a budget wildcard. Whether you’re a weekend warrior, a serious marathon runner, a desk-bound professional trying to move more, or someone just beginning their fitness journey, there was a tracker in 2018 that was built specifically with you in mind.

We wore each of these devices for extended periods — during commutes, gym sessions, long trail runs, international travel, and restless nights — to give you the most grounded, honest assessment possible.

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Design & Build Quality

Fitbit Charge 3

The Charge 3 was Fitbit’s biggest design leap in the Charge line. The aerospace-grade aluminum case replaced the plasticky feel of its predecessors, and the soft, replaceable sport bands came in a satisfying range of colors. The swim-proof rating (50 meters) was a genuine upgrade, and the slimmer profile meant it didn’t snag on jacket sleeves. In the box: the tracker, a proprietary magnetic charging cable, and a small and large band option.

Fitbit Versa

Designed to bridge the gap between tracker and smartwatch, the Versa wore a square face reminiscent of the Apple Watch — but at roughly a third of the price. The aluminum body felt premium, the wristbands were interchangeable and stylish enough for office wear, and the whole package came in at a refreshingly light weight. Its water resistance matched the Charge 3 at 50 meters.

Garmin Vivosmart 4

Garmin’s answer to the slim-band crowd, the Vivosmart 4 had a sleek, almost jewelry-like profile with a subtle AMOLED display tucked into a metal-accented housing. It was the thinnest Garmin tracker to date and genuinely passed as a fashion accessory in a way previous Garmin devices never managed.

Garmin Forerunner 935

This was unambiguously a performance tool. Built with a fiber-reinforced polymer case and a mineral crystal lens, the Forerunner 935 was bulkier than lifestyle trackers but worn like a badge of honor among triathletes and ultra-runners. It came loaded with multiport GPS, altimeter, barometer, and compass sensors, and the box included a charging/data clip and optional HRM-Run heart rate monitor strap.

Xiaomi Mi Band 3

At under $30, the Mi Band 3 was genuinely shocking in terms of build quality. A curved OLED touchscreen, a silicone band that resisted sweat and grime admirably, and a 50-meter water resistance rating made this the value leader of 2018 by a wide margin.

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Key Features & Performance

Heart Rate Monitoring

All five devices featured continuous optical heart rate monitoring, but accuracy varied significantly. The Garmin Forerunner 935, paired with the HRM-Run chest strap, was the gold standard — delivering near-ECG accuracy during high-intensity intervals. The Fitbit Charge 3 and Versa were excellent during steady-state cardio but occasionally stuttered during rapid heart rate changes like HIIT sprints. The Vivosmart 4 introduced Pulse Ox (blood oxygen saturation) sensing — a genuinely forward-thinking feature for a tracker at its price point. The Mi Band 3 delivered acceptable resting HR readings but struggled during intense exercise.

GPS Tracking

Built-in GPS was exclusive to the Garmin Forerunner 935 in this roundup. The Fitbit Versa and Charge 3 relied on connected GPS (borrowing your phone’s signal), which worked well in practice but tethered you to your smartphone. For serious runners tracking elevation gain and precise pace splits, the Forerunner 935 was untouchable.

Sleep Tracking

Sleep tracking was a standout feature across the Fitbit lineup. The Charge 3 and Versa both delivered Sleep Stages data — breaking down REM, light, and deep sleep cycles — and Fitbit’s companion app presented this in genuinely actionable, easy-to-understand graphs. Garmin’s sleep tracking was competent but felt more utilitarian by comparison. The Mi Band 3 offered basic light/deep sleep detection, which was impressive for the price but lacked depth.

Battery Life

This is where the field diverged most starkly. The Garmin Forerunner 935 lasted up to two weeks in smartwatch mode or 24 hours in full GPS mode — exceptional for a performance device. The Vivosmart 4 offered around 7 days. The Fitbit Charge 3 hit approximately 7 days of real-world use. The Fitbit Versa managed 4-5 days. The Mi Band 3 was the outlier champion here: a remarkable 20+ days between charges.

Smartwatch Features

The Fitbit Versa was the clear leader for smartwatch functionality — offering on-device apps, Fitbit Pay (NFC payments), music storage for offline playback, and responsive notification mirroring. The Charge 3 handled notifications admirably for a band-form device. Garmin’s Connect IQ platform on the Forerunner 935 offered customizable apps and watch faces, though the ecosystem felt more niche than Fitbit’s.

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Real-World Use Experience

Commuting: The Fitbit Versa shone here — notifications from texts and calendar events appeared quickly and were readable even in sunlight. The quick-reply feature on Android was a genuine quality-of-life addition during packed subway rides.

Travel: The Garmin Forerunner 935’s multi-day battery made it ideal for long-haul trips without hunting for charging outlets. The Fitbit Charge 3’s slim profile and swim-proofing made it equally appealing for travelers who wanted one device for the beach and the business meeting.

Work: The Vivosmart 4 won the office award. It looked like a piece of minimalist jewelry, the Move IQ auto-detection quietly logged walks to the coffee machine, and the discrete AMOLED display didn’t scream “I’m wearing a fitness tracker” in a client meeting.

Exercise: For casual gym-goers, the Fitbit Charge 3 and Versa were perfectly calibrated — automatic workout detection, clear rep counting for select exercises, and post-workout summaries that actually motivated continued effort. For runners and cyclists demanding data density, the Forerunner 935 was a different category of device entirely: VO2 max estimates, Training Effect scores, recovery advisor, and advanced running dynamics set it apart.

Sleep: Testing the Fitbit Charge 3 over six weeks revealed genuinely eye-opening patterns — identifying that late-evening screen time correlated with reduced deep sleep percentages. That kind of longitudinal insight was the trackers’ most underrated value proposition in 2018.

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Pros

• Fitbit’s ecosystem and app remain the most beginner-friendly in the industry — the dashboard is intuitive, motivating, and social
• Garmin Forerunner 935 delivered professional-grade athletic performance data at a fraction of dedicated sports computer prices
• Fitbit Versa offered genuine smartwatch utility — Fitbit Pay, music storage, and app support — for well under $200
• Vivosmart 4’s Pulse Ox feature was a preview of health monitoring features that would become mainstream in years to come
• The Mi Band 3 made fitness tracking accessible to virtually everyone with a sub-$30 price and 20-day battery
• Swim-proof ratings across nearly the entire lineup eliminated the anxiety of wearing tech near water
• Across the board, automatic exercise detection improved dramatically in 2018, reducing the need for manual workout logging

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Cons

• Connected GPS dependency (Fitbit Versa, Charge 3) was a meaningful limitation for runners who left their phone at home
• Fitbit’s proprietary charging cables were easily lost and not universally compatible — a persistent frustration in the ecosystem
• The Garmin Forerunner 935’s price point (~$449 at launch) placed it out of reach for casual users who didn’t need its full feature set
• Heart rate accuracy during high-intensity intervals remained inconsistent across wrist-based optical sensors industry-wide
• Third-party app ecosystems, while improving, still lagged significantly behind Apple Watch and Android Wear competitors

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Who Should Buy / Who Should Skip

Buy if:

• You’re starting a fitness journey and want an accessible, encouraging companion → Fitbit Charge 3
• You want a smartwatch-fitness tracker hybrid without the Apple tax → Fitbit Versa
• You’re a triathlete, runner, or cyclist who demands precise performance metrics → Garmin Forerunner 935
• You want stylish discretion with cutting-edge health sensing → Garmin Vivosmart 4
• Your budget is tight but you still want reliable tracking → Xiaomi Mi Band 3

Skip if:

• You require standalone LTE connectivity for calls and streaming
• You’re deeply embedded in the Apple ecosystem (Apple Watch remains superior there)
• You need a medical-grade device for clinical health monitoring

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Verdict

Category	Fitbit Charge 3	Fitbit Versa	Garmin Vivosmart 4	Garmin FR935	Mi Band 3
Design	4.5	4.7	4.6	3.8	4.0
Heart Rate Accuracy	4.2	4.2	4.3	4.8	3.5
GPS Performance	3.5	3.5	3.0	5.0	2.5
Battery Life	4.3	4.0	4.4	4.9	5.0
Smart Features	4.0	4.5	3.8	4.0	3.0
Value for Money	4.4	4.2	4.3	3.8	5.0
Overall	4.2	4.4	4.1	4.6	3.8

2018 proved that fitness trackers had genuinely earned a permanent place in the health and wellness conversation. The Fitbit Versa earns our top recommendation for most people — it struck the most balanced combination of smartwatch utility, health tracking depth, stylish design, and approachable price. Serious athletes should look no further than the Garmin Forerunner 935, which remained the most capable performance wearable available at any price. And if your budget is the deciding factor, the Xiaomi Mi Band 3 delivered results that embarrassed devices costing five times as much. No matter your goals, your lifestyle, or your budget, 2018’s fitness tracker lineup had you covered — and these devices hold up remarkably well even today as a reference point for how far the category has come.