Samsung Galaxy Fit3 Review: Long Battery Life, Samsung Health

The Samsung Galaxy Fit3 (SM-R390) is a slim fitness band with a 1.6-inch AMOLED touchscreen, heart rate monitoring, SpO2, and Samsung Health integration. It's smaller and lighter than a smartwatch while covering the core health and activity tracking features most people actually use daily. Battery life of up to 13 days means you're charging it roughly twice a month.

I've worn fitness bands alongside full smartwatches for several years. The Fit3 sits in a niche that full watches don't cover: it's light enough to sleep in comfortably and doesn't distract you with notifications the way a watch face does.

Display and Design

The 1.6-inch AMOLED display is large for a band. It's bright enough to read in direct sunlight at maximum brightness. Samsung added swipe navigation on all sides, which makes navigating menus and checking stats comfortable with one hand.

The band comes in three colors: graphite, pink gold, and silver. The silicone strap feels comfortable for extended wear. Strap swaps are possible but you'll need to source third-party replacement bands since Samsung doesn't market a variety of official options.

Health and Fitness Tracking

Sleep tracking is the Fit3's strongest feature. It detects sleep stages automatically and logs the data in Samsung Health, where you can view trends over weeks and months. The sleep coaching feature compares your patterns to recommended benchmarks and suggests adjustments. This level of sleep analysis used to be exclusive to medical-grade wearables.

Heart rate monitoring runs continuously or in interval mode to preserve battery. Accuracy is within 3-4 bpm of a chest strap under light to moderate activity. At peak exercise intensity, some optical PPG sensors drift - the Fit3 shows similar behavior to competitors at this price point.

GPS tracking relies on your phone's GPS, which means you need to carry your phone for route mapping on runs. Stand-alone GPS is only available on the Galaxy Watch series.

Samsung Health Integration

All data syncs to Samsung Health, which provides long-term trend analysis, sleep scoring, and energy score calculations. If you're in the Samsung ecosystem with a Galaxy phone, the integration is seamless. Samsung Health also syncs to Google Fit and some third-party apps through API connections.

SmartThings integration allows some automation triggers based on health data - for example, dimming lights when the Fit3 detects you're entering sleep mode. That feature requires a compatible SmartThings setup and is more useful than it sounds for people who automate their bedroom environment.

Who Should Buy It

The Galaxy Fit3 suits Samsung Android users who want fitness and sleep tracking without the bulk of a full smartwatch. At around $49, it undercuts Galaxy Watch pricing significantly. If you want ECG, NFC payments, or third-party app support, step up to a Galaxy Watch. For straightforward activity and sleep tracking with long battery life, the Fit3 is a strong choice in its category.