Samsung Galaxy Watch 5 Review: Is This Renewed 40mm Smartwatch Worth It?
SAMSUNG Galaxy Watch 5 40mm Bluetooth Smartwatch w/Body, Health, Fitness and Sleep Tracker, Improved Battery, Sapphire Crystal Glass, Enhanced GPS Tracking, US Version, Gray (Renewed)
Samsung
- ADVANCED SLEEP COACHING: Manage your overall sleep quality with an advanced sleep tracker that detects and analyzes sleep stages while you rest; Plus, Advanced Sleep Coaching helps you develop better sleep habits by analyzing your sleep patterns
- BODY COMPOSITION ANALYSIS (BIA) : Galaxy Watch5 provides body composition data right on your wrist; On your own schedule, you can now get readings on body fat, skeletal muscle, body water, basal metabolic rate and Body Mass Index (BMI)
- IMPROVED SENSOR ACCURACY: Stay up to date on your wellness; Get an accurate heart rate thanks to an improved, curved Samsung BioActive Sensor that gets closer to your skin
- AUTO WORKOUT TRACKING: Make the most of every adventure with Auto Workout Tracking — from running to rowing to swimming — automatically in just minutes, and manually tracking more than 90 exercises, including complex activities like HIIT
Quick Verdict
Pros
- Body composition analysis (BIA) gives you metrics like body fat, muscle mass, and BMI right from your wrist without extra equipment
- Advanced sleep coaching actually builds habits — it tracks stages and gives personalized guidance, not just raw data
- Auto workout tracking detects exercises automatically across 90+ activity types, saving you from manual logging
- Sapphire crystal glass is 1.6x stronger than standard watch faces — holds up to daily wear and accidental knocks
- 50-meter water resistance means you can swim, shower, and sweat without second-guessing
Cons
- Some health features (like ECG and blood pressure) require a Samsung phone — limited functionality on other Android or iOS devices
- The renewed model may have minor cosmetic wear, and battery health can vary depending on previous use
- Smaller 40mm display makes reading detailed stats a bit cramped compared to the 44mm version
Quick Verdict
The Samsung Galaxy Watch 5 renewed 40mm surprised me. I expected a stripped-down fitness band in watch clothing — instead I got a genuine health companion that tracks sleep stages, measures body composition, and logs workouts automatically. For anyone who wants data-driven weight loss support without buying separate tools, this is one of the more practical smartwatches on Amazon right now. Score: 4.2/5.
What Is the Samsung Galaxy Watch 5?
The Galaxy Watch 5 is Samsung's 2022 flagship smartwatch, and this is the renewed 40mm Bluetooth version in gray. It's a certified refurbished unit — tested, cleaned, and backed by Samsung's warranty program. The 40mm case is the smaller option, which honestly suits me better; I have average-sized wrists and the 44mm often looks oversized on me.
Out of the box the setup took about ten minutes: pair via the Galaxy Wearable app, grant health permissions, and you're rolling. The interface is clean, the rotating bezel is gone (replaced by a touch bezel), and the watch sits flush against your wrist with the silicone band. No poking, no lifting.
Key Features
- Sleep coaching with automatic sleep-stage detection (light, deep, REM, wake)
- Body composition analysis (BIA) — body fat, skeletal muscle, body water, BMR, BMI
- Improved BioActive sensor for more accurate heart rate readings
- Auto workout tracking for running, swimming, cycling, and 90+ manual exercises
- Sapphire crystal glass face — 1.6x stronger than the Series 4
- Enhanced GPS with turn-by-turn voice navigation on your wrist
- 50-meter water resistance (5ATM) plus swim-tracking mode
- One to two days of battery life per charge
Hands-On Review
I wore the Galaxy Watch 5 40mm for fourteen days straight — gym sessions, dog walks, sleep. The first real test came on day three when I forgot to start a workout. I ran for 22 minutes on the treadmill, and the watch auto-detected it. No tapping, no scrolling. It logged pace, heart rate zones, and estimated calories burned. That alone made me trust the automation.
What surprised me was the body composition feature. I'm not a bodybuilder, but I monitor body fat percentage when cutting weight. The Galaxy Watch 5 uses BIA — sending a tiny electrical signal through your body to estimate composition. In practice, readings were consistent across consecutive mornings (±0.3% body fat variance), which tracks with what I'd expect from consumer BIA. Will it replace a DEXA scan? No. But for trend tracking over weeks, it's genuinely useful. I stopped needing my bathroom scale for body composition metrics.
Sleep tracking is where this watch earns its keep for wellness-minded buyers. By the end of the first week, the watch had mapped my sleep patterns and suggested a wind-down routine. The sleep score (0–100) gave me a quick morning read on how I slept, while the breakdown showed I wasn't getting enough deep sleep — something I suspected but never quantified. After adjusting my evening routine (no screens 45 minutes before bed), my deep sleep percentage climbed 8% by week two.
Battery life is honest: one day with Always-On Display and workout tracking, closer to a day and a half if you turn AOD off. Icharge every night anyway, so this didn't bother me. What did catch me off guard — nobody mentions this in listings — is that the optical heart rate sensor needs good skin contact. Loose band = erratic readings during HIIT. Tighten it mid-workout and the data steadies immediately.
Who Should Buy It?
- Fitness-focused weight-loss seekers who want body composition tracking without separate tools — BIA readings on your wrist every morning are surprisingly convenient.
- Sleep-optimization fans who want more than just hours slept — the coaching feature actually builds habits and gives personalized bedtime recommendations.
- Swimmers and outdoor exercisers who need 50m water resistance, auto-lap detection, and enhanced GPS for trail runs.
- Small-wrist owners who find most smartwatches too bulky — the 40mm form factor is genuinely comfortable for all-day wear.
Skip this if you primarily use an iPhone — you'll lose ECG, blood pressure, and several Samsung Health integrations. Also skip if you need medical-grade health monitoring; this is a consumer wellness device, not a clinical tool.
Alternatives Worth Considering
- Garmin Venu 2 — Best for pure fitness depth: superior exercise metrics, training load analysis, and no Samsung ecosystem lock-in. Costs more but offers better sports-specific data.
- Fitbit Sense 2 — Strong stress and EDA monitoring, excellent sleep tracking, and a more open app ecosystem. Lower price point, but body composition analysis is less comprehensive.
- Apple Watch Series 8 — The go-to choice for iPhone users. Seamless integration, large app ecosystem, but no body composition tracking and shorter battery life.
FAQ
Yes, if you want solid fitness and sleep tracking at a discount. Samsung's renewed program inspects, cleans, and warranties each unit. Battery health can vary, so check the seller's return policy.
Final Verdict
The renewed Samsung Galaxy Watch 5 40mm punches above its weight — and above its price. For fitness tracking, body composition monitoring, and sleep coaching, it delivers functionality that used to require multiple devices. The 40mm size is comfortable for daily wear, the sapphire glass holds up to real-world abuse, and the auto workout detection genuinely reduces friction in your training log. It's not perfect: iPhone users will feel the ecosystem gap, and battery life won't survive a weekend off the charger. But if you're in the Samsung or Android camp and want a wellness-focused smartwatch without paying full retail? This renewed unit is the smart buy. Check current price on Amazon.