10 Best Smart Watches Under 100 2025 in the United States

The Garmin Venu 3S is an attractive option for those seeking a feature-packed smartwatch under $100. Its 1.2-inch AMOLED touchscreen display is bright and vibrant, making it easy to read in various lighting conditions. One of its standout features is the impressive battery life, lasting up to 10 days in smartwatch mode, which is quite beneficial for those who prefer not to charge their device frequently. Fitness enthusiasts will appreciate the comprehensive fitness tracking capabilities, including over 30 built-in sports apps, heart rate monitoring, stress tracking, and sleep coaching with personalized insights and tips.

The Body Battery energy monitoring feature is an added bonus, helping users understand their energy levels throughout the day based on various factors like sleep and workouts. The watch is compatible with both Android and iOS devices, allowing a wide range of users to connect their smartphones. It also offers convenient smart features such as receiving notifications, making and taking phone calls, and using a voice assistant. The Garmin Venu 3S is water-resistant, making it suitable for activities like swimming.

On the design front, it has a stylish soft gold stainless steel bezel and a comfortable silicone band, ensuring a good fit throughout the day. However, some might find the 41mm case size a bit small, depending on their wrist size. Additionally, while it has many advanced features, the user interface may take a little time to get used to, especially for those new to smartwatches. The Garmin Venu 3S offers a balanced mix of style, functionality, and affordability, making it a solid choice for budget-conscious buyers who don’t want to compromise on features.

The Amazfit T-Rex 3 stands out in the under-$100 smartwatch category with its rugged design and extensive features. The 1.5-inch AMOLED display offers exceptional brightness (up to 2,000 nits), ensuring readability in all lighting conditions. It includes a night mode and glove mode for added convenience. With a battery life of up to 27 days under typical use, it excels in longevity. The watch supports over 170 fitness and sport modes, making it suitable for a variety of physical activities, along with AI-generated training plans that provide real-time performance updates.

Compatibility with both Android and iPhone is covered, and the built-in dual-band GPS paired with free downloadable maps and satellite system support ensures accurate tracking of outdoor adventures. It is also water-resistant up to 328 feet, perfect for swimming or freediving up to 147 feet. The rugged design, with a military-grade body and stainless steel bezel, can withstand extreme temperatures, adding durability.

However, the large and rugged build may not appeal to those seeking a sleeker, more stylish smartwatch. Additionally, while voice control and notifications functions are robust, they may require some getting used to for seamless use. The absence of a USB Type-C cable in the box may be a minor inconvenience. Despite these minor drawbacks, the Amazfit T-Rex 3 is a comprehensive and reliable option for fitness enthusiasts and adventure seekers looking for an affordable, feature-rich smartwatch.

The Sanorum Smart Watch offers a lot for its price, making it a strong contender in the smart watches under $100 category. The 1.83-inch color touch screen is bright and customizable, with over 500 watch faces and adjustable brightness levels. It comes with three interchangeable bands, adding versatility and comfort to its design. The fitness tracking capabilities are robust, with over 120 sport modes and 24/7 health monitoring, including heart rate, SpO2, and sleep tracking. This makes it a great choice for fitness enthusiasts who want to keep track of various activities and health metrics. The watch is water-resistant up to 5ATM, so you can wear it while swimming or in the shower without worry. Battery life is another strong point, offering up to 10 days on a single charge, which is excellent for daily use and outdoor activities.

Compatibility with both iPhone and Android ensures it can pair with most smartphones, though it does not support PCs, iPads, or tablets. Bluetooth calling and notifications keep you connected, but note that you cannot send messages from the watch. Additional features like a voice assistant, flashlight, music and camera controls, and female health tracking provide added convenience. However, some users might find the lack of built-in GPS a drawback, as it relies on your smartphone's GPS for location tracking.

The watch's build quality and customer service are well-regarded. If you're looking for a feature-rich, affordable smart watch with extensive fitness tracking and good battery life, the Sanorum Smart Watch is a solid choice, especially if built-in GPS is not a priority for you.