Qualcomm Snapdragon W5 Gen 2 (4nm, 4x ARM Cortex A53 @1.7GHz, ARM Cortex M55 co-processor)
2GB LPDDR4X SDRAM
32GB eMMC 5.1
1.4" 456x456 Actua 360 AMOLED, domed Corning Gorilla Glass, up to 3000 nits peak brightness, Always-On Display (45mm) / 1.2" 408x408 Actua 360 AMOLED, domed Corning Gorilla Glass, up to 3000 nits peak brightness, Always-On Display (41mm)
455mAh (45mm) / 325mAh (41mm) built-in rechargeable lithium-ion, up to 40 hours normal use (45mm) / up to 30 hours normal use (41mm), up to 48 hours in Battery Saver mode, fast-charge: 50% in 15 min, 80% in 25 min, 100% in 45 min
Qualcomm Snapdragon W5 Gen 1 (4nm, quad-core Cortex-A53, up to 1.7GHz) + BES 2800 co-processor (Dual-Engine Architecture)
2GB LPDDR4X
32GB eMMC
1.5" 466x466 LTPO AMOLED, up to 2200 nits peak brightness, sapphire crystal, Always-On Display
648mAh, up to 5 days in Smart Mode, up to 3 days heavy use, up to 12 days in Power Saver Mode, 10-minute charge for 1-day use (OnePlus Silicon NanoStack Battery)
Qualcomm Snapdragon W5 Gen 2 (4nm, 4x ARM Cortex A53 @1.7GHz, ARM Cortex M55 co-processor)
2GB LPDDR4X SDRAM
32GB eMMC 5.1
1.4" 456x456 Actua 360 AMOLED, domed Corning Gorilla Glass, up to 3000 nits peak brightness, Always-On Display (45mm) / 1.2" 408x408 Actua 360 AMOLED, domed Corning Gorilla Glass, up to 3000 nits peak brightness, Always-On Display (41mm)
455mAh (45mm) / 325mAh (41mm) built-in rechargeable lithium-ion, up to 40 hours normal use (45mm) / up to 30 hours normal use (41mm), up to 48 hours in Battery Saver mode, fast-charge: 50% in 15 min, 80% in 25 min, 100% in 45 min
36.7g (45mm) / 31g (41mm) without band
Bluetooth 6.0, Wi-Fi 6 (802.11 a/b/g/n/ac/ax 2.4GHz + 5GHz)
Wear OS 6.0 with Pixel UI
45 x 45 x 12.3 mm (45mm) / 41 x 41 x 12.3 mm (41mm)
Qualcomm Snapdragon W5 Gen 1 (4nm, quad-core Cortex-A53, up to 1.7GHz) + BES 2800 co-processor (Dual-Engine Architecture)
2GB LPDDR4X
32GB eMMC
1.5" 466x466 LTPO AMOLED, up to 2200 nits peak brightness, sapphire crystal, Always-On Display
648mAh, up to 5 days in Smart Mode, up to 3 days heavy use, up to 12 days in Power Saver Mode, 10-minute charge for 1-day use (OnePlus Silicon NanoStack Battery)
76g (without strap), ~94g (with strap)
Bluetooth 5.2, Wi-Fi 5 (802.11 a/b/g/n/ac 2.4GHz+5GHz)
Wear OS 5 (based on Android 14) with OnePlus Watch software overlay
46.6 x 46.6 x 12.1 mm (without heart rate sensor bump)
1.5" 480x480 Super AMOLED, Always-On Display, Sapphire Crystal, up to 2000 nits peak brightness
Built-in rechargeable lithium-ion, 425mAh (44mm) / 300mAh (40mm), up to 40 hours normal use, up to 65 hours in Power Saving mode, fast-charge capable (WPC-based wireless charging)
33.1g (44mm) / 28.8g (40mm) without band
Bluetooth 5.3, Wi-Fi 5 (802.11 a/b/g/n/ac)
Wear OS 5 with One UI 6 Watch
44.4 x 43.3 x 9.7 mm (44mm) / 40.4 x 39.3 x 9.7 mm (40mm)
Smartwatches have evolved from a luxury accessory into an essential health tracking tool, personal assistant, and connectivity device on the wrists of millions. With the ability to measure heart rate, track sleep, provide GPS for sports, reply to messages, and even make calls, today's smartwatches can replace your phone in many situations.
However, with countless options from the Apple Watch, Samsung Galaxy Watch, Garmin, Fitbit, and Chinese brands like Xiaomi and Huawei, choosing the right smartwatch can be overwhelming. This guide will help you make the right decision.
What to Know Before Buying a Smartwatch
The four most important factors: ecosystem (iOS vs Android), health and fitness features, battery life, and design.
Ecosystem is the deciding factor. The Apple Watch only works with the iPhone — no Android compatibility. The Samsung Galaxy Watch works best with Samsung Galaxy phones but also works with other Android devices. Garmin, Xiaomi, Huawei, and Fitbit are compatible with both iOS and Android but lose some features on iOS. Wear OS (Google) works with Android and has basic support on iOS.
Health features: heart rate monitoring, SpO2, ECG (electrocardiogram), sleep tracking, stress measurement, skin temperature, and the latest — non-invasive blood glucose monitoring. If you care about overall health, the Apple Watch Series 9/10 and Samsung Galaxy Watch 6/7 are the best. If you're an athlete, Garmin is the top choice.
Battery life: Apple Watch needs daily charging (18-36h). Samsung Galaxy Watch lasts 1-2 days. Garmin can last 7-14 days (Fenix up to 28 days). Xiaomi and Huawei last 7-14 days. If you don't want to charge daily, choose Garmin or Huawei.
Full combination of smart and health features. Reply to messages, make calls, rich app ecosystem, comprehensive health tracking. Suitable for most people. Drawback: weak battery (1-2 days).
Sports-Focused Watches (Garmin, Suunto, Polar)
Focused on sports, high GPS accuracy, long battery life, high durability. Suitable for athletes, runners, cyclists, swimmers, climbers. Smart features are more limited (basic message replies, no extensive app installation).
Cheap, lightweight, long battery (14 days+), basic health tracking. Few smart features. Suitable for those who just need step counting and basic sleep tracking.
Design resembles traditional watches, round face, traditional hands combined with smart features (health tracking, notifications). Suitable for those who love classic style and don't like large screens.
Budget Tiers
Tier
Price
Features
Examples
Basic
300K - 1M VND
Fitness tracker, small screen, 14-day battery, steps + heart rate
Xiaomi Mi Band 9, Huawei Band 9, Honor Band 9
Mid-range
1 - 4M VND
Basic smartwatch, AMOLED, GPS, SpO2, 5-7 day battery
Fitness tracking, community, Google Fit integration
Mid-range - Premium
Comparison with Alternatives
Smartwatch vs Analog Watch
Analog watches don't need charging, last forever, and hold fashion and investment value. Smartwatches need charging, become obsolete after 2-3 years, but offer health tracking, notifications, and GPS. If you only need to tell time, an analog watch is sufficient. If you want health tracking and connectivity, a smartwatch is the modern choice.
Apple Watch vs Galaxy Watch vs Garmin
Apple Watch is best for iPhone users — deep integration, beautiful display, rich app ecosystem. Galaxy Watch is best for Samsung/Android users — Wear OS, Google Assistant, Samsung Health. Garmin is best for athletes — long battery, accurate GPS, detailed sports metrics. Each has its strengths — none is universally "best."
Smartwatch vs Fitness Tracker
Fitness trackers (Mi Band, Fitbit Inspire) are 2-5x cheaper, have longer battery life, and are lighter. However, they lack built-in GPS (use phone GPS), have small screens, can't reply to messages, and can't install apps. If you only need step counting and sleep tracking, a fitness tracker is enough.
Common Mistakes When Buying
Buying an Apple Watch while using Android — The Apple Watch doesn't work with Android. You won't be able to connect it at all.
Buying an overpriced smartwatch for basic needs — If you only need step counting and time, a 500K VND Xiaomi Mi Band is enough. Don't buy an Apple Watch Ultra 2 if you don't climb mountains.
Not checking iPhone compatibility — Some Android smartwatches (Xiaomi Watch, Huawei Watch) lose message reply functionality when connected to an iPhone.
Ignoring battery life — The Apple Watch and Samsung Galaxy Watch need daily charging. If you don't want to charge frequently, choose Garmin or Huawei Watch GT.
Buying a smartwatch with unnecessary LTE — LTE requires a separate data plan and drains the battery faster. Only buy it if you really need to run without your phone.
Forgetting about watch face size — A 46mm Apple Watch Ultra is too big for a small wrist. Try it on before buying.
Conclusion
A smartwatch is an important personal device — choose based on the phone you use first. If you use an iPhone, the Apple Watch Series 9/SE (2-5M VND for SE, 10-12M VND for Series 9) is the undisputed choice. If you use Android, the Samsung Galaxy Watch 6 (5-8M VND) or Garmin Venu 3 (7-10M VND) are excellent. With a budget under 2M VND, the Xiaomi Watch S3 or Huawei Watch GT 4 offer a good experience.
Final advice: don't buy a smartwatch just because it looks good. Determine what you need it for — health tracking, sports, or connectivity — and choose the right product for that need. The right smartwatch will be your daily companion for 3-5 years.