| Fitbit Charge | Polar Grit X | |
|---|---|---|
| Pricing | ||
| Starting price | $120★ | $749 |
| Subscription | ℹ️ Optional — $79/yr | ✓ None |
| Hardware | ||
| Weight | 15g★ | 57g |
| Water resistance | 50m | 100m★ |
| Battery | 7 days | 40 days★ |
| Always-on display | ❌ | ❌ |
| GPS | ✅ | ✅ |
| Cellular | ❌ | ❌ |
| Platform | iOS & Android | iOS & Android |
| Tier | Fitness Tracker | Sports GPS |
| Buy timing | ||
| Released | Sep 28, 2023 | Apr 11, 2024 |
| Cycle advice | bad | bad |
| Deals advice | great★ | good |
| Next model | Fitbit Charge 7 (Expected 2026) | — |
Full ECG, electrodermal activity stress sensing, SpO2, and continuous heart rate in a tracker thinner than most smartwatches.
Google Maps navigation, Google Wallet NFC payments, and YouTube Music controls — more useful on-device apps than any previous Charge.
7 days of typical use, dropping to around 30 minutes per GPS workout session before needing a charge.
Five times the battery of the Vantage V3 — enough for week-long mountain stages or ultramarathons without charging access.
Automatically segments your run by uphill and downhill sections, calculating pace and power for each — essential for mountain race training.
Running power without a chest strap or foot pod — Polar's key differentiator versus Garmin at this price tier.
The right pick depends on what you optimize for.
$357 vs $749 over 3 years · no required subscription.
40 days vs 7 days battery.
6 sensors.
15g · no required subscription.
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 →Trail runners, hikers, and outdoor athletes who want Polar's analytics with significantly longer battery life than the Vantage V3. The titanium case and sapphire glass make it suitable for technical terrain where watch durability matters.
Full details →