10 Best Fitness Tracker For Iphones 2025 in the United States

The Apple Watch Ultra 2 is a robust fitness tracker tailored for iPhone users. With its rugged titanium case and bright Always-On Retina display, it withstands tough conditions and provides clear visibility. The watch features highly accurate dual-frequency GPS, making it perfect for runners, cyclists, and hikers who need precise tracking. Its water resistance up to 100 meters and advanced swim tracking capabilities also make it suitable for swimmers and divers.

The extensive battery life—up to 36 hours of normal use, extendable to 72 hours in Low Power Mode—ensures it can last through prolonged activities without frequent recharging. Heart rate monitoring, sleep tracking, and health notifications, including ECG and irregular heart rhythm alerts, provide comprehensive health insights. Cellular connectivity allows for phone-free calls and messages, as well as music streaming.

The Apple Watch Ultra 2 also offers detailed workout metrics and customizable training plans, enhancing its value for serious athletes. Its premium price and complex feature set might be overkill for casual users or those seeking a simpler fitness tracker. It is best suited for outdoor enthusiasts and sports enthusiasts who require durable design and advanced functionalities.

The Garmin vívoactive 5 is a solid fitness tracker, particularly compatible with iPhones and Android devices. It boasts an impressive battery life of up to 11 days in smartwatch mode, which means less frequent charging and more time tracking your activities. The bright and colorful AMOLED display makes the data easy to read and engaging. The device offers comprehensive health monitoring, including wrist-based heart rate, Body Battery energy monitoring, sleep tracking with personalized coaching, and stress tracking.

Additionally, it features advanced training options and more than 30 built-in sports apps, covering a wide range of activities including running, swimming, and even wheelchair-specific workouts. The built-in GPS is a great feature for outdoor activities, providing accurate location tracking without needing to carry your phone. Water resistance ensures you can use it while swimming or in the shower without worry. For music lovers, the ability to download playlists and listen phone-free is a convenient feature.

However, some weaknesses include a relatively small screen size at 1.2 inches, which might be less appealing for users who prefer larger displays. Additionally, while it offers extensive functionalities, the vast array of features might be overwhelming for users who prefer simpler, more straightforward devices. Finally, the need to manage another app (Garmin Connect) might be seen as a minor inconvenience for some users. Despite these minor drawbacks, the vívoactive 5 is a strong contender in the fitness tracker market, especially for users looking for a detailed health monitor with robust sports tracking capabilities.

The Apple Watch Series 9 (GPS, 41mm) is an excellent fitness tracker for iPhone users who want a feature-rich and stylish smartwatch. It works seamlessly with iPhones (XS or later), offering smooth integration with apps and services like Apple Pay and Fitness+. The watch features a bright Always-On Retina display which is easy to see during workouts or daily wear. Battery life generally lasts about a day, so you’ll likely need to charge it overnight, which is typical for smartwatches with many features.

For fitness and health tracking, it covers all the essentials: accurate heart rate monitoring, built-in GPS for tracking outdoor activities, and detailed sleep tracking that shows different sleep stages. It also includes advanced health features like ECG and temperature sensing, which can provide deeper insights into your wellbeing beyond just basic step counting. The device is swimproof with 50m water resistance and dust resistant, making it durable enough for various environments. Safety features like Fall Detection and Crash Detection add extra peace of mind, especially if you’re active or spend time outdoors.

You’ll also stay connected with notifications, calls, texts, music control, and Siri voice control right on your wrist, so you don’t have to pull out your phone constantly. The watch is customizable with different bands and faces to match your style, and the lightweight aluminum case is comfortable for everyday wear. While it packs many advanced features, the battery life might feel short if you use GPS and health sensors heavily throughout the day. As a premium Apple product, it’s priced higher than basic fitness trackers. If you’re an iPhone user looking for a versatile, highly capable fitness tracker that doubles as a stylish smartwatch with deep health insights, the Apple Watch Series 9 is a strong choice. For those seeking simpler tracking or longer battery life, other options might be more suitable.