Apple Watch UltravsGarmin Forerunner 165
11d vs 2.1d
battery life
Garmin Forerunner 165 lasts longer
$550
price gap
Garmin Forerunner 165 cheaper
0.2 Hz
HR sampling
Apple Watch Ultra only — Garmin Forerunner 165 undisclosed
24g
lighter
Garmin Forerunner 165
Apple Watch Ultra
Buy/Wait:good
Current model just released
Full details →Garmin Forerunner 165
Buy/Wait:superseded
This model is no longer sold new. It has been replaced by the Garmin Forerunner 170.
Full details →| Apple Watch Ultra | Garmin Forerunner 165 |
|---|
| Pricing |
| Starting price | $799 | $249★ |
| Subscription | ✓ None | ℹ️ Optional — $70/yr |
| Hardware |
| Weight | 63g | 39g★ |
| Water resistance | 100m★ | 5ATM |
| Battery | 2.1 days | 11 days★ |
| Always-on display | ✅★ | ❌ |
| GPS | ✅ | ✅ |
| Cellular | ✅★ | ❌ |
| Platform | iOS only | iOS & Android |
| Tier | Sports GPS | Sports GPS |
| Buy timing |
| Released | Sep 18, 2026 | Mar 5, 2024 |
| Cycle advice | good | superseded |
| Deals advice | neutral | clearance |
| Next model | — | — |
Health Sensors
9 exclusive sensors
Irregular RhythmBackground optical check for irregular heart rhythms
Fall DetectionAuto-calls emergency services after a hard fall
Crash DetectionDetects vehicle crashes and alerts emergency contacts
Sleep ApneaFDA-cleared detection of signs of moderate to severe sleep apnea
ECGDetects irregular heart rhythms (AFib)
Skin TempOvernight changes linked to illness or cycle tracking
Blood PressureDetects hypertension patterns — trend tracking, not clinical mmHg
Depth GaugeMeasures water depth — certified for recreational diving to 40m
Water TempMeasures water temperature during swimming and diving
3 shared
Heart RateContinuous or on-demand pulse tracking
SpO2Blood oxygen saturation, tracked during sleep
HRVHeart rate variability — stress & recovery scores
2 exclusive sensors
Stress TrackingStress estimate from HRV and physiological signals
Body BatteryGarmin's energy reserve — how much fuel left in the tank
Why buy each?
Apple Watch Ultra
50-hour battery + satellite SOSThe Ultra 4 lasts roughly twice as long as the Series 12, with up to 45 hours of GPS workout tracking in Max Extended Workout mode. Satellite Emergency SOS works without cellular or WiFi coverage.
Heart rate every five secondsThe new health sensing system samples heart rate every five seconds all day and HRV every five minutes, feeding a 0–10 readiness score.
3000-nit titanium-cased powerhouseThe 49mm titanium case and 3000-nit display make this watch usable in full direct sunlight and water depths up to 100m (recreational scuba diving to 40m).
Garmin Forerunner 165
AMOLED display at entry-level priceThe FR165 is the first Garmin entry-level running watch with an AMOLED display — dramatically more readable than the LCD it replaces.
Full Garmin running analyticsTraining load, recovery time, Body Battery, HRV status, VO2 max estimation — the same analytics found on watches costing twice as much.
11 days of battery11 days typical use and roughly 19 hours GPS — enough for most training blocks without mid-week charging.
Quick Winner
The right pick depends on what you optimize for.
For the budget
Garmin Forerunner 165 wins
$459 vs $799 over 3 years.
For battery life
Garmin Forerunner 165 wins
11 days vs 2.1 days battery.
For health depth
Apple Watch Ultra wins
12 sensors · 0.2 Hz HR sampling.
For daily comfort
Garmin Forerunner 165 wins
39g.
Bottom Line
- Watch Ultra-only sensors: Irregular Rhythm, Fall Detection, Crash Detection, Sleep Apnea, ECG, Skin Temp, Blood Pressure, Depth Gauge, Water Temp.
- Forerunner 165-only sensors: Stress Tracking, Body Battery.
- Weight. Forerunner 165 is 24g lighter — relevant for all-day comfort and sleep.
- Water resistance. Watch Ultra rates 100m vs 5ATM on Forerunner 165.
- Hardware cost. Forerunner 165 is $550 cheaper upfront ($249 vs $799).
Pick the Apple Watch Ultra if…
Serious athletes, trail runners, triathletes, and outdoor adventurers who need the most durable, most accurate GPS watch Apple makes. Also for iPhone users who simply want the best Apple Watch regardless of sport, and value the extra battery life over the Series 12.
Full details →Pick the Garmin Forerunner 165 if…
Beginner and intermediate runners who want real GPS accuracy and Garmin's analytics depth without the price of the 570 or 970. Also ideal as a first serious GPS watch for anyone moving up from a fitness tracker.
Full details →