Xiaomi Mijia Sports Watch Review: Fitness Tracking Meets Smart Style

Xiaomi Mijia Sports Watch has 50,000+ reviews on JD.com with a 4.3/5 rating at ¥599 ($83). Users love the vibrant 1.43-inch AMOLED always-on display, the dual-band GPS for accurate outdoor tracking, and the impressive 14-day battery life with typical use. The main complaints are the heart rate sensor accuracy during high-intensity workouts, the Zepp app feeling less polished than alternatives, and limited third-party watch face support. Conclusion: ✅ Worth Buying — a well-rounded sports watch under ¥600 with excellent battery life and display quality.

Introduction

Xiaomi’s Mijia brand has expanded from smart home devices into wearables with this dedicated sports watch. Unlike the Xiaomi Watch series which runs a full smartwatch OS, the Mijia Sports Watch focuses on fitness tracking with longer battery life and a more traditional watch aesthetic.

At ¥599 ($83), it competes directly with the Amazfit T-Rex 3 and Huawei Watch Fit 3, offering a balance of features, display quality, and battery life that exceeds most rivals in its price range. The dual-band GPS is a standout feature at this price point, typically found only on ¥1,000+ watches.

Specifications

Feature	Mijia Sports Watch	Xiaomi Watch S4	Amazfit T-Rex 3	Huawei Watch Fit 3
Price (JD)	¥599 ($83)	¥999 ($139)	¥799 ($111)	¥699 ($97)
Display	1.43” AMOLED (466×466)	1.43” AMOLED	1.39” AMOLED	1.64” AMOLED
GPS	Dual-band (L1+L5)	Single-band GPS	Dual-band GPS	Single-band GPS
Heart Rate	PPG (6 LED)	PPG (4 LED)	PPG (6 LED)	PPG (4 LED)
Battery Life	14 days typical	10 days typical	20 days typical	7 days typical
Water Resistance	5 ATM	5 ATM	10 ATM	5 ATM
Sports Modes	150+	100+	150+	100+
Weight	52g (without strap)	48g	66g	26g
OS	Zepp OS	MIUI Watch	Zepp OS	HarmonyOS Lite
NFC	Yes (Chinese payment)	Yes	No	Yes
JD Rating	4.3/5	4.4/5	4.3/5	4.4/5
JD Reviews	50,000+	80,000+	40,000+	100,000+

Design and Build Quality

The Mijia Sports Watch has a clean, minimalist design with a circular 1.43-inch AMOLED display. The 466×466 resolution is sharp and bright, with excellent outdoor visibility even in direct sunlight. The always-on display mode is customizable with various watch faces.

The case is aluminum alloy with a matte finish, paired with a comfortable silicone strap. At 52g, it’s light enough for all-day and sleep wear. The two-button layout (crown + function button) is intuitive — the crown rotates smoothly for scrolling menus.

The 5 ATM water resistance covers swimming and showering but not high-pressure water sports. The glass is hardened mineral glass — not sapphire, so be careful against hard surfaces.

“The display is gorgeous. Coming from a Huawei Band 7, this is night and day. The always-on display is bright enough to read outdoors. The dual-band GPS is surprisingly accurate for a ¥599 watch — it plotted my running route perfectly through a park with tall buildings nearby.” — JD.com verified buyer

Performance

The dual-band GPS (L1+L5) provides excellent tracking accuracy, especially in urban environments with building interference. In testing, GPS lock takes about 15-20 seconds — comparable to higher-priced watches. Route accuracy is within 2-3% of measured distance.

Heart rate tracking is good for steady-state cardio (running, cycling, walking) but shows lag during HIIT and interval training. The 6-LED PPG sensor picks up rate changes but with a 5-10 second delay during rapid transitions. SpO2 and stress tracking work well throughout the day.

Battery life is a highlight. 14 days of typical use includes always-on display, daily 30-minute GPS workouts, heart rate monitoring 24/7, and sleep tracking. Heavy GPS use (5+ hours/week) drops this to about 10 days.

“Bought specifically for marathon training. The dual-band GPS tracks accurately even on tree-covered trails — my previous Amazfit would lose signal. Heart rate is consistent with my chest strap during easy runs but diverges during intervals. 14-day battery is real — I charge every two weeks like clockwork.” — JD.com verified buyer

User Reviews by Theme

Display Quality

“The AMOLED screen is beautiful. Bright, colorful, and sharp. The always-on display is well-implemented — dim but readable. Way better than my friend’s Huawei Watch Fit 3 which has that long pill shape. Circular watch faces look natural.” — JD.com verified buyer

💡 Summary: Display is a highlight. 1.43” AMOLED at this price point is excellent. Always-on mode is battery-efficient.

GPS Accuracy

“Dual-band GPS is the reason I bought this. My running routes match exactly with my phone’s GPS. Previous single-band watches would skip and jump around. Great for runners and cyclists who care about accurate distance.” — JD.com verified buyer

💡 Summary: Dual-band GPS delivers premium-level accuracy. Noticeable improvement over single-band competitors.

Heart Rate Accuracy

“Heart rate is fine for steady running and daily tracking. During HIIT and burpees it lags significantly — showing 130 when I’m at 160. The SpO2 is surprisingly accurate though. If you need precise HR during intervals, use a chest strap.” — JD.com verified buyer

💡 Summary: Steady-state HR tracking is good. Interval/HIIT accuracy has noticeable delay.

App Experience

“The Zepp app (formerly Amazfit) has improved but still feels cluttered. Data presentation could be cleaner. The workout data export is limited compared to Garmin Connect. App notifications work well with both Android and iOS.” — JD.com verified buyer

💡 Summary: Zepp app is functional but lags behind top-tier fitness platforms in polish.

Purchase Recommendations

✅ Worth Buying (¥599)

Best for runners, cyclists, and fitness enthusiasts who need accurate GPS tracking without spending ¥1,000+. The combination of dual-band GPS, excellent display, and 14-day battery is unbeatable at this price.

💰 Premium Pick

For ¥799, the Amazfit T-Rex 3 offers rugged build, longer 20-day battery, and similar Zepp OS experience. Best for outdoor adventurers and those needing extra durability.

⚠️ Budget Warning

At ¥169, the Xiaomi Band 9 Pro offers basic GPS and fitness tracking at a much lower price. Good for casual users who don’t need the Sports Watch’s display and GPS precision.

Pros & Cons

✅ Pros	❌ Cons
Stunning 1.43” AMOLED display	Heart rate lags during HIIT/interval training
Dual-band GPS — excellent accuracy	Limited third-party watch face support
14-day battery life with AOD	Zepp app UI could be cleaner
Lightweight (52g) and comfortable	No music storage or on-watch music control
5 ATM water resistance	No built-in speaker or microphone
Excellent value at ¥599	No sapphire glass protection

FAQ

Q: Xiaomi Mijia Sports Watch vs Xiaomi Watch S4 — which is better? A: The Sports Watch has better battery life (14 vs 10 days) and dual-band GPS. The Watch S4 runs MIUI Watch with more smart features (app store, calling, Bluetooth music). Choose Sports Watch for fitness focus; Watch S4 for smartwatch features.

Q: Can the Mijia Sports Watch play music? A: No, it can control phone music playback but has no onboard music storage or Bluetooth audio output. For music-free runs, you’ll need your phone.

Q: Does the watch support third-party watch faces? A: Yes, limited third-party support through the Zepp app store. The selection is smaller than Wear OS or Apple Watch. About 50+ free and 20+ paid faces available.

Q: How accurate is the sleep tracking? A: Sleep tracking is good for duration and basic phase detection (deep/light/REM). Accuracy is comparable to Xiaomi Band 9 and Amazfit watches. Naps under 20 minutes may not be detected.

Q: Does the Mijia Sports Watch work with iPhone? A: Yes, it pairs via the Zepp app on iOS. Notification support is good. Watch faces and settings sync fine. Some features (like NFC payment) are China-region only.