Fenix 9 vs Apple Watch Ultra 4
Verified 2026-10-04
A factual specification comparison between the Fenix 9 and the Apple Watch Ultra 4.
Image: Garmin Ltd.
Garmin · SmartwatchFenix 9
- Status
- Released · 2026-08-28
- Verification
- Verified
- Last checked
- Checked 2026-10-04
Image: Apple Inc.
Apple · SmartwatchApple Watch Ultra 4
- Status
- Released · 2026-09-19
- Announced
- Announced 2026-09-09
- Verification
- Verified
- Last checked
- Checked 2026-10-03
Key differences
SpecificationFenix 9Apple Watch Ultra 4
Design & Build
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Water resistance (differs) | Dive-rated to 40 meters | 100m water resistance (ISO standard 22810:2010), IP6X dust resistance (IEC 60529), EN13319 recreational scuba diving to 40m, tested to MIL-STD-810H |
| Case dimensions (differs) | Available in 43mm, 47mm, and 51mm case sizes | 49mm height x 44mm width x 12mm depth; fits 130-210mm wrists |
| Build materials (differs) | Titanium case | Titanium case (Grade 5) |
Display
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Display (differs) | AMOLED display, scratch-resistant sapphire lens | Always-On Retina display, wide-angle OLED, LTPO3 (1Hz minimum refresh), flat sapphire crystal |
Battery & Charging
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Battery life (differs) | Up to 29 days (51mm, smartwatch mode) | Up to 50 hours normal use; up to 84 hours in Low Power Mode; up to 18 hours workout tracking; up to 25 hours Extended Workout; up to 45 hours Max Extended Workout |
Connectivity
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Positioning (differs) | Multi-band GNSS | Precision dual-frequency GPS (GPS, Galileo, QZSS, BeiDou), second-generation Ultra Wideband chip |
Software
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Operating system at launch (differs) | Garmin OS | watchOS 27 |
Security & Sensors
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Health sensors (differs) | ECG, 24/7 health and wellness tracking, LED flashlight | Second-generation electrical heart sensor, Always-on optical heart sensor, Blood oxygen sensor, Temperature sensor, Depth gauge, Water temperature sensor, Compass, Always-on altimeter, High-g accelerometer, High dynamic range gyroscope, Ambient light sensor |
These are specifications where both devices have a confirmed value and the values differ. A difference is not a judgement that either device is better.
Full specifications
differs · Not disclosed: not published by the manufacturer · —: not recorded
SpecificationFenix 9Apple Watch Ultra 4
Design & Build
3 differences
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Water resistance (differs) | Dive-rated to 40 meters | 100m water resistance (ISO standard 22810:2010), IP6X dust resistance (IEC 60529), EN13319 recreational scuba diving to 40m, tested to MIL-STD-810H |
| Colors | Not recorded | Natural, Black |
| Weight | Not recorded | Natural: 63.0 g, Black: 63.1 g |
| Case dimensions (differs) | Available in 43mm, 47mm, and 51mm case sizes | 49mm height x 44mm width x 12mm depth; fits 130-210mm wrists |
| Build materials (differs) | Titanium case | Titanium case (Grade 5) |
Display
1 difference
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Display (differs) | AMOLED display, scratch-resistant sapphire lens | Always-On Retina display, wide-angle OLED, LTPO3 (1Hz minimum refresh), flat sapphire crystal |
| Peak brightness (nits) | Not recorded | 3000 |
| Resolution | Not recorded | 422x514 px (326 ppi) |
Performance
No differences
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Chipset model name | Not recorded | S11 |
| Chipset | Not disclosed | Apple S11: 64-bit dual-core processor, 4-core Neural Engine |
Memory & Storage
No differences
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Storage (GB) | 64 · same on both | |
Battery & Charging
1 difference
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Charging time | Not recorded | Up to 80% charge in about 45 minutes (fast-charge capable) |
| Battery life (differs) | Up to 29 days (51mm, smartwatch mode) | Up to 50 hours normal use; up to 84 hours in Low Power Mode; up to 18 hours workout tracking; up to 25 hours Extended Workout; up to 45 hours Max Extended Workout |
Connectivity
1 difference
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Wi-Fi | Not recorded | Wi-Fi 4 (802.11n), 2.4GHz and 5GHz |
| Bluetooth | Not recorded | Bluetooth 5.3 |
| Contactless payments | Not recorded | Apple Pay |
| Cellular connectivity | Not recorded | 5G RedCap and LTE (cellular model, Model A3579) |
| Positioning (differs) | Multi-band GNSS | Precision dual-frequency GPS (GPS, Galileo, QZSS, BeiDou), second-generation Ultra Wideband chip |
Software
1 difference
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Operating system at launch (differs) | Garmin OS | watchOS 27 |
| Phone compatibility | Not recorded | iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 27 or later |
Security & Sensors
1 difference
| Specification | Fenix 9 | Apple Watch Ultra 4 |
|---|---|---|
| Health sensors (differs) | ECG, 24/7 health and wellness tracking, LED flashlight | Second-generation electrical heart sensor, Always-on optical heart sensor, Blood oxygen sensor, Temperature sensor, Depth gauge, Water temperature sensor, Compass, Always-on altimeter, High-g accelerometer, High dynamic range gyroscope, Ambient light sensor |
Terms used on this page (6)
- ppi
- Pixels per inch: how densely pixels are packed on the screen.
- Nits
- A unit of screen brightness (candela per square metre). Typical, HDR and outdoor peak figures are measured under different conditions.
- Refresh rate (Hz)
- How many times per second the display can redraw the image.
- IP rating
- Ingress protection under IEC 60529: the first digit rates dust protection, the second water protection, each under the manufacturer's stated test conditions.
- OLED
- A display whose pixels emit their own light, so black areas can be fully dark; LCDs use a separate backlight.
- MIL-STD-810H
- A US military test standard. Manufacturers choose which of its tests to run, so it does not imply a specific level of durability.
Sources & verification
Apple Watch Ultra 4
Verified 2026-10-03- Apple Inc.Manufacturer specificationsTier 1
- Apple Inc.ManufacturerTier 1
Tier 1 sources are the manufacturer's own product pages, technical specification sheets, or support documentation. Tier 2 sources are reputable independent technical references, used only for facts that couldn't be confirmed from official documentation.