OnePlus began U.S. sales of the OnePlus Watch 3 43mm and OnePlus Buds 4 on July 8, 2025, at launch prices of $299.99 and $129.99, respectively. Those are launch details—not confirmation that every color, retailer, or region still has stock in 2026. Check the live store listing and checkout before buying.
Launch date, prices, and where to check availability
OnePlus announced the North American launch for July 8, 2025. The 43mm Watch 3 is the smaller version of the Watch 3, while Buds 4 are standard-line earbuds below the Buds Pro 3. OnePlus’s launch announcement listed these regional prices:
| Product | United States | Canada | United Kingdom | Europe | India |
|---|---|---|---|---|---|
| OnePlus Watch 3 43mm | $299.99 | CA$399.99 | £279 | €279 | not stated (OnePlus launch announcement) |
| OnePlus Buds 4 | $129.99 | CA$169.99 | £99 | €99 | ₹5,999 |
These are launch prices, not verified current prices. Taxes, promotions, retailer pricing, and stock vary by market and over time.
United States
OnePlus maintains a U.S. Watch 3 43mm product page with a purchase path. For Buds 4, check the OnePlus U.S. audio store; launch coverage reported direct OnePlus sales from July 8, 2025, with broader Best Buy and Amazon availability planned for August 2025. OnePlus also lists U.S. retail locations. A live product page does not guarantee a particular color or retailer has stock.
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#1 Best Overall
- 24/7 Health Tracking: Watch 3 Pro can monitor heart rate, blood oxygen (SpO₂), stress levels in real time with an advanced 4-channel sensor for improved accuracy during activity and rest. This health tracker smartwatch can offer advanced sleep tracking helps analyze naps, recovery, and sleep quality for better daily wellness insights.
- 130+ Sports Modes: The sports smartwatch supports 130+ exercise modes with GOMORE-powered performance analysis, 7-type motion recognition, and precision activity tracking to help monitor workouts, training load, recovery, and daily movement more accurately. Active Score (MET-based fitness tracking), precision step counting, and smart health guidance help support a healthier lifestyle.
- Smart Everyday Convenience: Stay connected with the bluetooth smartwatch featuring dual high-performance MEMS microphones, a built-in speaker, and AI-based noise reduction trained on over 100,000 voice samples for clearer calls. Make and receive calls directly from your wrist, sync up to 30 contacts for quick access, control music playback, and send quick replies while working, commuting, cooking, or exercising without constantly checking your phone.
- 13-Day Battery Life: Enjoy up to 13 days of battery life on the smartwatch with just 2.5 hours charging time for daily use. Designed for work, workouts, travel, and busy schedules, CMF Watch 3 Pro delivers reliable power for music playback, quick replies, calls, and everyday activity tracking without frequent charging interruptions.
- AMOLED Display & Smart Lifestyle Sync: Featuring a vibrant AMOLED display, this smartwatch for Android and iPhone delivers clear visibility for health data, messages, and workouts indoors or outdoors. Seamlessly sync with Apple Health, Google Fit, and Strava to manage fitness tracking, wellness insights, and daily activity data in one connected ecosystem.
Canada, the U.K., Europe, and India
The launch announcement listed regional prices above. OnePlus has a U.K. Buds 4 product page. Check the store serving your country for current availability, shipping, warranty, and final price; the launch announcement does not establish present inventory in each market.
OnePlus Watch 3 43mm: a smaller Wear OS option
The 43mm version is intended for people who want a less bulky watch than the standard Watch 3. Its stainless-steel case measures approximately 43.2 × 43.2 × 11mm, excluding the PPG hardware, and weighs about 37.8g without the strap. The display is a 1.32-inch AMOLED panel with 466 × 466 resolution. Full specifications are on OnePlus’s U.S. specification page.
Hardware and battery claims
The watch uses a Snapdragon W5 Gen 1 platform alongside a BES2800BP secondary MCU, with 2GB RAM and 32GB storage. Its battery is rated at 345mAh, with 354mAh typical capacity. OnePlus claims up to 60 hours in Smart Mode, up to 36 hours under heavy use, and up to seven days in power-saving mode. These are manufacturer estimates for different usage modes, not a single guaranteed runtime. OnePlus also says ten minutes of charging can provide up to 24 hours of normal use and that a full charge takes about an hour.
Rank #2
- DUAL-BAND GPS & OFFLINE MAPS: Navigate confidently with dual-band positioning and six satellite systems. Use offline maps, turn-by-turn navigation, and automatic rerouting to stay on track without your phone.
- 21-DAY BATTERY: Get up to 21 days of battery life on a single charge, and never worry about forgetting your charger on trips. Enjoy long battery life performance from work, to workouts, to weekend trips.
- AMOLED SCREEN & BUILT-IN FLASHLIGHT: A large 1.5" AMOLED screen protected by sapphire glass is easy to read in bright daylight or night. Stay safe and visible in low-light conditions with the built-in white or tactical red flashlight.
- NO SUBSCRIPTION APP: Health, recovery, and workout data is free to access in the included Zepp App. Track calories and protein goals.
- APP CONNECTIONS & HYROX TRAINING: Use fitness apps like Strava, TrainingPeaks, Intervals.ICU to share workouts. Improve HYROX training with built-in HYROX training plans and Virtual Pace simulations.
Software and phone compatibility
The Watch 3 43mm runs Wear OS 5 and requires an Android phone running Android 9.0 or later with compatible Google Mobile Services version 23.45.23 or later, plus the OHealth app from Google Play. It does not support iPhones or Android Go devices. The cited product information does not establish a cellular version, so do not assume the watch can replace a phone connection when away from your handset.
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Health features and water resistance
OnePlus lists heart-rate, blood-oxygen, sleep, cycle, and wellness tracking. The company says the watch is not a medical device; treat readings as informational estimates, not diagnosis or medical monitoring. It carries 5ATM and IP68 ratings, but OnePlus’s guidance excludes hot showers, saunas, hot springs, deep diving, and diving. Saltwater or liquid damage may not be covered by warranty, so the ratings should not be read as waterproofing.
43mm versus the larger Watch 3
The main reason to choose 43mm is fit: its smaller, lighter body can suit a smaller wrist or a preference for a less prominent watch. The trade-off is a smaller screen and battery than the larger Watch 3, so the 43mm model is less appealing if you prioritize a large display for maps, workouts, or notifications, or expect the larger model’s endurance. OnePlus rates this model for up to 60 hours in Smart Mode; do not assume identical battery life, sensors, or feature support across sizes without checking each model’s specifications.
Rank #3
![Samsung Galaxy Watch 8 44mm Bluetooth Smartwatch, Cushion Design, Quick Button, Sleep Coaching, Now Bar, Running Coach, Energy Score, Silver [US Version, Amazon Exclusive 2Yr Warranty]](https://m.media-amazon.com/images/I/31D3ljx8XwL._SL160_.jpg)
- WHY GALAXY WATCH8: Advanced health and sleep tracking features.* A lighter, more snug design for all day comfort.* Improved user interface.* Personal AI assistant for hands free help.⁴* 2-Year Warranty.
- SLEEP SMARTER. LIVE BETTER: Energize your days with a great night’s rest using Advanced Sleep Coaching¹ - improved with even more ways to keep your nights on track. Plus, Bedtime Guidance² helps you find your optimal bedtime.
- YOUR RUN, YOUR COACH: Step up your running routine with a Running Coach³ that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
- NEW DESIGN. LIGHTWEIGHT FEEL: Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
- A PERSONAL ASSISTANT, RIGHT ON YOUR WRIST: Your Watch just became your personal assistant.⁴ Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists.
OnePlus Buds 4: audio features and practical trade-offs
Buds 4 use an 11mm woofer and 6mm tweeter with dual DACs. OnePlus lists LHDC 5.0 and Hi-Res Audio support up to 24-bit/192kHz where compatible hardware and software support it. The earbuds also offer Bluetooth 5.4, Google Fast Pair, adaptive ANC, Transparency mode, and a 47ms low-latency gaming mode.
Noise cancellation and battery
OnePlus advertises real-time dynamic ANC up to 55dB, with adjustment up to 800 times per second. Those are manufacturer claims, not a promise of the same noise reduction in every environment. Its battery estimates are up to 45 hours with the case and ANC off, or up to 24 hours with ANC on; the earbuds alone are rated for up to 11 hours with ANC off and six hours with ANC on. OnePlus says a ten-minute charge can provide up to 11 hours of playback when used with the case under its test conditions.
Compatibility, fit, and charging
OnePlus phones offer the deepest integration; some functions require OxygenOS 15 or newer on select models. LHDC and Hi-Res features need compatible Android devices. AI Translation depends on supported OnePlus phones, software, apps, and languages rather than being universal. On iOS and other Android brands, some features require the HeyMelody app, and not every advertised function is guaranteed. Buds 4 come in Zen Green and Storm Gray. The earbuds are rated IP55, but the case is not; do not treat the case as equally water-resistant.
Android Central’s review praised the sound, dual-driver design, and ANC, but its reviewer criticized inconsistent touch controls, limited feedback when switching ANC modes, the chunky earbud shape, and the lack of wireless charging. The reviewer also noted that Buds 4 are less compelling at full price if Buds Pro 3 are available for only a modest premium. That assessment reflects the reviewer’s experience, and current prices must be checked at purchase.
Quick Recap
Which one makes sense for you?
Choose the Watch 3 43mm if
- You want Wear OS on Android but find large watches uncomfortable or oversized.
- You value a smaller case and multi-day battery estimates more than a large display or cellular connectivity.
- You want OnePlus/OHealth integration and understand that the health readings are not medical measurements.
Reconsider the Watch 3 43mm if
- You use an iPhone or Android Go phone.
- You need cellular service from the watch, a large display, or medical-grade monitoring.
- You expect the 43mm model to match the larger Watch 3’s battery endurance.
Choose Buds 4 if
- You want ANC, dual-driver hardware, and low-latency gaming support in a midrange earbud set.
- You use a compatible OnePlus phone and do not need wireless charging.
- The current price is meaningfully below a higher-tier alternative you would otherwise consider.
Reconsider Buds 4 if
- Wireless charging, dependable touch controls, or a slimmer in-ear fit is a priority.
- You use an iPhone and expect every OnePlus-specific feature to work.
- Buds Pro 3 are only slightly more expensive at the price you can actually buy them for.
Before you order
- Confirm the country, color, seller, and stock on the live listing and at checkout.
- Compare today’s price with the launch MSRP; temporary 2025 promotions should not be treated as current offers.
- Check the regional product page for warranty terms, included accessories, and specifications that may differ by market.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
