Garmin Fenix 5X vs. Garmin Forerunner 45

Fenix 5X
Forerunner 45
 GarminFenix 5XBuy NowGarminForerunner 45Buy Now

Basic Info

Suggested Price$699$199

Activity & Fitness

Cycling (Bicycling)


DurationUp to 12 days7 days


Windows Phone




Resolution240 x240208 x 208
Size1.2 inches1.04 inches


Audio Speaker


Barometer or Altimeter
Ultraviolet Sensor
Water Resistance10 ATM5 ATM




Operating SystemBuilt-in

Comparing Forerunner 45 and Fenix 5X

Garmin, a well-established brand in the GPS technology market, offers a wide range of smartwatches and fitness trackers tailored to meet the needs of different users. Among their popular products are the Garmin Fenix 5X and the Garmin Forerunner 45. Both devices boast a variety of features and advanced functionalities to aid those who seek to track and monitor their fitness goals effectively.

Choosing the right watch greatly depends on individual preferences and requirements. Therefore, it is essential to compare these devices in terms of design, build quality, features, user interface, and price. Garmin, as a brand, has built its reputation on delivering high-quality, reliable, and innovative products in the field of wearable technology. In this article, we will delve deep into the specifications, offerings, and differences between the Garmin Fenix 5X and Garmin Forerunner 45 to help you make an informed decision based on your unique requirements.

Design and Build

Garmin Fenix 5X

The Garmin Fenix 5X boasts a rugged design suited for adventurers and outdoor enthusiasts. Crafted with premium materials, this smartwatch features a stainless steel or diamond-like carbon (DLC) coated titanium bezel, sapphire glass, and a comfortable silicon band. With a 1.2-inch color display and a screen resolution of 240x240 pixels, the watch is easy to read in challenging outdoor conditions. The device is also water-resistant up to 10 ATM, ensuring durability and performance under various environments.

Garmin Forerunner 45

In contrast, the Garmin Forerunner 45 presents a lightweight and streamlined design suitable for runners and everyday users. This fitness tracker features a plastic bezel and a durable glass lens, with a 1.04-inch color display and a screen resolution of 208x208 pixels. The watch is water-resistant up to 5 ATM, offering reliable performance in various conditions. The Forerunner 45 is perfect for those who prefer a simple, unobtrusive design without sacrificing essential smartwatch and fitness features.

Comparison of design and build quality

The main differences between the Garmin Fenix 5X and the Garmin Forerunner 45 lie in their design and build materials. The Fenix 5X is more rugged and robust, with a larger screen and higher water resistance, ideal for outdoor enthusiasts and adventurers. On the other hand, the Forerunner 45 offers a sleek, lightweight design suited for runners and everyday users who prioritize comfort and simplicity without sacrificing functionality.

Features and Functionality

Garmin Fenix 5X

The Garmin Fenix 5X operates on a built-in operating system and includes a wide range of features such as GPS, GLONASS, and Galileo satellite support, advanced sports profiles, and activity tracking. The device is equipped with various sensors, including a heart rate monitor, barometric altimeter, compass, gyroscope, and thermometer. Moreover, the Fenix 5X provides up to 12 days of battery life in smartwatch mode and up to 35 hours in GPS mode.

Garmin Forerunner 45

Similarly, the Garmin Forerunner 45 runs on a built-in operating system and features GPS tracking, heart rate monitoring, and sport profiles for running, cycling, and swimming, among other activities. The device includes an accelerometer and a barometric altimeter but does not offer an oxygen tracking feature like the Fenix 5X. The Forerunner 45 has a battery life of up to 7 days in smartwatch mode and 13 hours in GPS mode.

Comparison of features and performance

Both the Garmin Fenix 5X and the Forerunner 45 offer comprehensive fitness tracking and sports profiles. However, the Fenix 5X has a slight edge in terms of features like oxygen tracking and longer battery life. Additionally, the Fenix 5X caters to a broader range of outdoor activities, making it more suitable for adventure seekers. Meanwhile, the Forerunner 45 focuses on essential fitness tracking features and maintains a simpler design, making it ideal for those who prioritize ease of use and affordability.

User Interface and User Experience

Garmin Fenix 5X

The Garmin Fenix 5X offers a user-friendly interface that allows for easy navigation through its menus and features. Users can customize the watch face, widgets, and data fields to their preferences. Additionally, the watch is compatible with Android, iOS, and Windows Phone devices, enabling seamless integration with various smartphone platforms for data syncing and smart notifications.

Garmin Forerunner 45

The Garmin Forerunner 45 also features an intuitive user interface, with easy access to information and customization options. The device is compatible with Android and iOS smartphones but does not support Windows Phone devices. Similar to the Fenix 5X, the Forerunner 45 allows users to sync their data with the Garmin Connect app for a more comprehensive fitness tracking experience.

Comparison of user interface and user experience

The Garmin Fenix 5X and Forerunner 45 offer similar user experiences in terms of navigation, customization, and smartphone compatibility. However, the Fenix 5X has a slight advantage in terms of compatibility with Windows Phone devices. Both watches provide a seamless experience through the Garmin Connect app, making it easy for users to track their progress and tailor their devices to meet their personal preferences.

Price and Value

Garmin Fenix 5X

With a price tag of $699, the Garmin Fenix 5X offers a premium build and a comprehensive set of features for outdoor enthusiasts and serious athletes. Its durability, advanced functionality, and customization options justify the higher price point for those who seek a reliable, high-performance fitness tracker and smartwatch.

Garmin Forerunner 45

The Garmin Forerunner 45, priced at $199, is a more affordable option for those who require essential fitness tracking features without the need for advanced outdoor capabilities. The device offers excellent value for money, with its streamlined design, user-friendly interface, and seamless smartphone integration.

Comparison of price and value

The Garmin Fenix 5X and Forerunner 45 cater to different segments of the market, with the Fenix 5X offering a more advanced, rugged design and features for outdoor enthusiasts, while the Forerunner 45 is a cost-effective solution for those who need essential fitness tracking functionality. Ultimately, the choice between these devices depends on individual preferences, requirements, and budget.


In summary, the Garmin Fenix 5X and Forerunner 45 are both excellent choices for fitness enthusiasts with different priorities and requirements. The Fenix 5X offers a rugged design, advanced features, and superior durability, making it ideal for outdoor adventurers and serious athletes. On the other hand, the Forerunner 45 provides essential fitness tracking capabilities in a streamlined, lightweight design, perfect for runners and everyday users. With either device, users can benefit from Garmin’s reliable performance, accurate tracking, and seamless integration with smartphone platforms.

Frequently Asked Questions

Which watch is better for battery life, the Garmin Fenix 5X or the Forerunner 45?

The Garmin Fenix 5X offers up to 12 days of battery life in smartwatch mode, while the Forerunner 45 has a battery life of up to 7 days. In GPS mode, the Fenix 5X lasts up to 35 hours, whereas the Forerunner 45 lasts up to 13 hours.

Do both the Garmin Fenix 5X and Forerunner 45 have GPS tracking?

Yes, both the Garmin Fenix 5X and Forerunner 45 come equipped with GPS tracking capabilities for accurate tracking of distance, speed, and other metrics during various activities.

Are the Garmin Fenix 5X and Forerunner 45 water-resistant?

Yes, both devices offer water resistance. The Garmin Fenix 5X has a water resistance rating of 10 ATM, while the Forerunner 45 has a rating of 5 ATM.

Can I receive phone notifications on the Garmin Fenix 5X and Forerunner 45?

Yes, both watches support smartphone integration, allowing users to receive smart notifications for texts, calls, and emails when paired with a compatible Android or iOS device.

Is the Garmin Fenix 5X suitable for swimming?

Yes, the Garmin Fenix 5X offers a swim tracking feature, along with a water resistance rating of 10 ATM, making it suitable for swimming and other water-based activities.

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