Apple Watch Ultra vs Garmin Fenix 8 – Check Which One Is Best & Why?

Garmin Fenix 8 & Apple Watch Ultra share many similarities, but there are also important differences, such as quality, performance, features, design, and connectivity. If you want the best one between them, I Would recommend the Garmin Fenix 8 rather than the Apple Watch Ultra

Why Do I Recommend The Garmin Fenix 8?

  • The Garmin Fenix 8 features multi-band GNSS with GPS, GLONASS, Galileo, and BeiDou support for superior satellite accuracy in remote and mountainous regions, whereas the Apple Watch Ultra supports only dual-frequency GPS (L1 and L5).
  • Garmin Fenix 8 has solar charging capability through its Power Glass lens to extend battery life during outdoor use, while the Apple Watch Ultra relies solely on wired charging.
  • It includes offline topographic, road, and ski maps for full navigation without a smartphone connection, whereas the Apple Watch Ultra requires an iPhone for detailed map functionality.
  • The Garmin Fenix 8 comes with up to 28 days of smartwatch battery life for long expeditions without frequent charging, while the Apple Watch Ultra provides only up to 36 hours of usage per charge.
  • Garmin Fenix 8 supports ANT+ connectivity to link with professional sensors like heart rate straps and power meters, whereas the Apple Watch Ultra uses Bluetooth only.
  • It features a built-in LED flashlight for nighttime activities and safety visibility, while the Apple Watch Ultra lacks a dedicated flashlight and relies on the display for illumination.
  • The Garmin Fenix 8 includes a Body Battery metric to track daily energy and recovery for better training management, whereas the Apple Watch Ultra does not include an equivalent energy-level indicator.
  • Garmin Fenix 8 provides a Training Readiness score that combines HRV, recovery, and sleep data to guide workout intensity, while the Apple Watch Ultra presents fitness data separately without a unified readiness measure.

Maybe the Apple Watch Ultra can make you comfortable because it’s a little bit cheaper than the Garmin Fenix 8. But you have to compromise all the above-mentioned features. Now the Decision is Yours. I hope it was helpful to choose the right one.

Side-by-Side Comparison

FeatureGarmin Fenix 8Apple Watch Ultra
Display technologyAMOLED / Solar MIP optionsLTPO OLED Retina
Case sizes43 / 47 / 51 mm49 mm
Battery life (smartwatch mode)Up to ~21–29 daysUp to 36 hours
Battery life (GPS tracking)Up to ~54–84 hoursUp to 17 hours
Solar chargingAvailable on Solar modelsNot available
Dive roleFull dive computerDepth gauge + dive app
Dive algorithm supportBühlmann ZHL-16cNo decompression algorithm
Buttons / controls5 physical buttons + touchDigital Crown + side + Action + touch
LED flashlightBuilt-in top LEDNo hardware LED
GNSS / navigation hardwareMulti-band GPS + GLONASS/Galileo/BeiDouPrecision dual-frequency GPS
Offline mapsFull topo / road / ski offline mapsNo full offline topo maps
Accessory connectivityBluetooth + ANT+Bluetooth (no ANT+)
Voice featuresOn-watch voice control + voice notesSiri voice assistant + dictation
Training readiness metricTraining Readiness scoreNo Training Readiness score
Energy / fatigue metricBody BatteryNo Body Battery
App ecosystemGarmin Connect IQ storewatchOS App Store
Platform integrationGarmin Connect platformApple Health + Fitness
PriceCheck Garmin 8 PriceCheck Apple Ultra Price

What Common Both Can Do?

  • GPS Tracking: Both watches include advanced GPS systems that allow users to accurately track outdoor routes, runs, and hikes. This ensures reliable navigation and distance measurement even in remote or challenging environments.
  • Heart Rate Monitoring: Each device provides continuous heart rate tracking to help users monitor their exertion levels, training intensity, and overall cardiovascular health during workouts and daily activities.
  • Blood Oxygen (SpO2) Sensor: Both models include SpO2 monitoring to measure oxygen saturation in the blood, an important health metric for altitude training and general wellness tracking.
  • Sleep Tracking: Each watch tracks sleep duration and quality, giving users insight into sleep patterns and recovery. This helps optimize rest and performance readiness.
  • Temperature Sensing: Both devices include temperature sensors that detect skin or ambient temperature changes, useful for wellness tracking and environmental adaptation during outdoor use.
  • Barometric Altimeter: The Fenix 8 and Ultra use barometric sensors to measure elevation gain and loss. This is particularly useful for hikers, climbers, and endurance athletes tracking vertical performance.
  • Compass: Each model has a built-in compass for accurate directional navigation, ensuring reliable orientation when exploring unfamiliar terrain without relying on a phone.
  • Accelerometer: Both watches include accelerometers that detect movement and track activity levels, essential for step counting, motion detection, and fall detection features.
  • Gyroscope: Each device uses a gyroscope to detect rotation and orientation changes, improving accuracy for motion tracking and workout recognition.
  • Always-On Display: Both watches feature always-on display modes that keep essential information visible at all times, enhancing usability during workouts and outdoor activities.
  • Water Resistance (10 ATM): Each device is rated for 10 ATM water resistance, allowing safe use while swimming, snorkeling, or during heavy rain without damage concerns.
  • Touchscreen: Both models have responsive touchscreens, allowing intuitive control and easy navigation through menus, maps, and apps.
  • Bluetooth Connectivity: Each watch supports Bluetooth for syncing data, streaming music, and pairing with smartphones or wireless accessories like earbuds and sensors.
  • Wi-Fi Connectivity: Both include Wi-Fi connectivity for syncing data, downloading updates, and accessing connected services without needing a phone nearby.
  • Music Storage: Each watch allows onboard music storage and offline playback, giving users the ability to listen during workouts without carrying a phone.
  • Workout Tracking: Both devices feature extensive workout tracking modes for multiple activities, including running, cycling, swimming, and strength training.
  • Stress Tracking: Each watch measures stress levels based on heart rate variability, helping users recognize and manage periods of high strain or fatigue.
  • Smart Notifications: Both models display notifications for calls, texts, and apps directly on the wrist, improving connectivity and convenience on the go.
  • Contactless Payments: Garmin Fenix 8 supports Garmin Pay and Apple Watch Ultra supports Apple Pay, allowing quick and secure payments without physical cards.
  • Titanium Build Option: Each device is available in a durable titanium case variant that enhances strength and reduces weight for outdoor and rugged use.

Common Features

FeatureGarmin Fenix 8Apple Watch Ultra
GPS TrackingYesYes
Heart Rate MonitoringYesYes
Blood Oxygen (SpO2) SensorYesYes
Sleep TrackingYesYes
Temperature SensingYesYes
Barometric AltimeterYesYes
CompassYesYes
AccelerometerYesYes
GyroscopeYesYes
Always-On DisplayYesYes
Water Resistance (10 ATM)YesYes
TouchscreenYesYes
Bluetooth ConnectivityYesYes
Wi-Fi ConnectivityYesYes
Music StorageYesYes
Workout TrackingYesYes
Stress TrackingYesYes
Smart NotificationsYesYes
Contactless PaymentsYesYes
Titanium Build OptionYesYes
Price Check Garmin 8 Price
Check Apple Ultra Price

FAQ

Is the Garmin Fenix 8 compatible with iPhones and Android devices?
Yes, the Garmin Fenix 8 is compatible with both iOS and Android devices through the Garmin Connect app, allowing full synchronization of fitness data, notifications, and updates.

Can the Apple Watch Ultra and Garmin Fenix 8 be used for diving?
Both watches can be used for diving, but the Garmin Fenix 8 functions as a more comprehensive dive computer with depth, gas, and decompression tracking, while the Apple Watch Ultra supports recreational diving up to 40 meters with its Oceanic+ app.

Do both watches include GPS navigation?
Yes, both the Fenix 8 and the Apple Watch Ultra include advanced GPS navigation systems, providing accurate location tracking and route guidance for outdoor activities like hiking and cycling.

Which watch has better battery life?
The Garmin Fenix 8 has significantly longer battery life, lasting up to several weeks depending on mode and solar charging, while the Apple Watch Ultra typically lasts about 36 hours per charge.

Can I download music directly to both watches?
Yes, both devices allow music storage and playback without a phone. The Fenix 8 supports offline Spotify and Amazon Music playlists, while the Apple Watch Ultra integrates Apple Music for seamless use.

Are both watches suitable for swimming?
Yes, both models are water-resistant to 10 ATM, making them suitable for swimming, snorkeling, and other water activities without risk of damage.

Do both watches support heart rate monitoring?
Yes, both include optical heart rate sensors for continuous monitoring during workouts and rest, providing insights into fitness performance and overall health.

Can I receive calls and messages on both devices?
Both can show calls and messages, but only the Apple Watch Ultra supports full call answering and texting directly from the wrist using its built-in LTE and microphone.

Do both watches have SpO2 sensors for blood oxygen monitoring?
Yes, the Garmin Fenix 8 and Apple Watch Ultra include SpO2 sensors that measure blood oxygen levels, which are useful for tracking acclimatization and sleep quality.

Which watch supports solar charging?
Only the Garmin Fenix 8 Solar editions include solar charging capability through Power Glass technology, extending usage time in sunlight. The Apple Watch Ultra does not support solar power.

Do both watches include offline maps?
The Garmin Fenix 8 includes preloaded topographic and ski maps with offline access, while the Apple Watch Ultra requires a paired iPhone for full map features and does not support standalone offline maps.

Can both track stress and recovery levels?
Yes, both watches can monitor stress using heart rate variability. The Fenix 8 adds a Body Battery feature to visualize energy and recovery, while the Apple Watch Ultra provides recovery insights through the Health app.

Do both support contactless payments?
Yes, both support NFC-based payments. The Garmin Fenix 8 uses Garmin Pay, and the Apple Watch Ultra uses Apple Pay, allowing secure transactions directly from the wrist.

Are both suitable for rugged outdoor use?
Yes, both are designed for durability with titanium construction and water resistance. The Fenix 8 focuses on extreme endurance and terrain tracking, while the Apple Watch Ultra emphasizes rugged design with smart connectivity.

Do both watches include temperature and altimeter sensors?
Yes, both have temperature sensors for environmental and skin readings, as well as barometric altimeters to measure elevation changes during hiking, running, or climbing activities.