Fitbit ChargevsApple Watch Ultra
7d vs 1.75d
battery life
Fitbit Charge lasts longer
$679
price gap
Fitbit Charge cheaper
6
more health sensors
Apple Watch Ultra
Fitbit Charge
Buy/Wait:bad
Late in cycle — a new model is likely coming
Full details →Apple Watch Ultra
Buy/Wait:bad
Late in cycle — a new model is likely coming
Full details →| Fitbit Charge | Apple Watch Ultra |
|---|
| Pricing |
| Starting price | $120★ | $799 |
| Subscription | ℹ️ Optional — $79/yr | ✓ None |
| Hardware |
| Weight | 15g★ | 62g |
| Water resistance | 50m | 100m★ |
| Battery | 7 days★ | 1.75 days |
| Always-on display | ❌ | ✅★ |
| GPS | ✅ | ✅ |
| Cellular | ❌ | ✅★ |
| Platform | iOS & Android | iOS only |
| Tier | Fitness Tracker | Sports GPS |
| Buy timing |
| Released | Sep 28, 2023 | Sep 19, 2025 |
| Cycle advice | bad | bad |
| Deals advice | great★ | good |
| Next model | Fitbit Charge 7 (Expected 2026) | Apple Watch Ultra 4 (Expected fall 2026) |
Health Sensors
1 exclusive sensor
EDA / StressSkin conductance sensor measuring stress responses
5 shared
ECGDetects irregular heart rhythms (AFib)
SpO2Blood oxygen saturation, tracked during sleep
Heart RateContinuous or on-demand pulse tracking
HRVHeart rate variability — stress & recovery scores
Skin TempOvernight changes linked to illness or cycle tracking
7 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
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
Why buy each?
Fitbit Charge
ECG and EDA stress in a slim bandFull ECG, electrodermal activity stress sensing, SpO2, and continuous heart rate in a tracker thinner than most smartwatches.
Google apps integrationGoogle Maps navigation, Google Wallet NFC payments, and YouTube Music controls — more useful on-device apps than any previous Charge.
7-day battery with GPS7 days of typical use, dropping to around 30 minutes per GPS workout session before needing a charge.
Apple Watch Ultra
42-hour battery + satellite SOSThe Ultra 3 nearly doubles the Series 11 battery life, and satellite emergency SOS works even without cellular or WiFi coverage.
Dual-frequency L1+L5 GPSMore precise GPS tracking in urban canyons and dense forests — critical for trail running, mountaineering, and triathlon.
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 (EN13319 certified for diving).
Quick Winner
The right pick depends on what you optimize for.
For the budget
Fitbit Charge wins
$357 vs $799 over 3 years.
For battery life
Fitbit Charge wins
7 days vs 1.75 days battery.
For health depth
Apple Watch Ultra wins
12 sensors.
For daily comfort
Fitbit Charge wins
15g.
Bottom Line
- Charge-only sensors: EDA / Stress.
- Watch Ultra-only sensors: Irregular Rhythm, Fall Detection, Crash Detection, Sleep Apnea, Blood Pressure, Depth Gauge, Water Temp.
- Weight. Charge is 47g lighter — relevant for all-day comfort and sleep.
- Water resistance. Watch Ultra rates 100m vs 50m on Charge.
- Hardware cost. Charge is $679 cheaper upfront ($120 vs $799).
Pick the Fitbit Charge if…
Anyone who wants serious health and fitness tracking without the bulk or cost of a full smartwatch. Works with both Android and iPhone, making it the most accessible Fitbit tracker in the lineup.
Full details →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 11.
Full details →