Haylou Watch 3: Complete Review — Is It Worth Every Penny?

The smartwatch market grew 34% globally between 2024 and 2026, and the entry-level segment — that sweet spot between R$150 and R$350 — has never been more competitive. Haylou, a Xiaomi subsidiary focused on accessories and wearables, entered this fight with a bold proposal: deliver “premium” smartwatch experience in an accessible body. The problem it solves is real: most Brazilians still hesitate to spend R$1,500+ on an Apple Watch or Samsung Galaxy Watch without being sure they’ll use the device beyond the first month of novelty.

The Haylou Watch 3 arrives in 2026 as the most mature evolution of the brand’s Watch line, bringing AMOLED display, improved optical heart rate sensor, SpO2 (blood oxygen), integrated GPS, and a battery that promises to last a week of use. Sounds like a wishlist from an expensive watch, but the price stays between R$220 and R$290 depending on the platform. But promise and delivery are different things — and that’s exactly what I’ll break down here.

I spent three weeks with the Haylou Watch 3 on my wrist, testing from the office to the gym, from morning park runs to sleep monitoring, including direct comparisons with competitors in the same price range. I also ran the companion app (Haylou Fun) on Android 15 and iOS 17 to evaluate the complete ecosystem experience. Let’s get to the facts.

Technical Specifications

Pros and Cons

Pros:

• Sharp and vibrant AMOLED display for the price range — better than any TFT or IPS from direct competitors
• Integrated GPS that works for runs and walks without needing your phone
• Battery that actually reaches 8-9 days with moderate use (notifications, continuous heart monitoring, no GPS)
• Clean and minimalist design — doesn’t look “cheap” on your wrist
• Genuine 5ATM resistance — tested in pool for 45 minutes with no issues
• Reasonably intuitive Haylou Fun app, with detailed health graphs
• 22 mm band compatible with hundreds of high-quality third-party bands
• Bluetooth 5.2 with stable connection up to 12 meters from smartphone

Cons:

• No NFC — contactless payment directly on the watch is out of the equation
• Apollo4 Blue Plus processor is efficient but limits complex animations — micro-stutters visible on elaborate watch faces
• GPS takes 15 to 40 seconds for initial lock, much slower than Garmin or Apple Watch
• No native voice assistant (no Alexa, no Google Assistant)
• Notifications display truncated text — long WhatsApp messages appear cut off
• Proprietary charger is a failure point — lose the cable, lose the watch
• Stress monitoring via HRV (heart rate variability) is imprecise compared to more robust sensors
• App has no web version or native export to Apple Health/Google Fit (requires intermediary app)

Cost-Benefit Analysis

Here’s the heart of the question. At R$249, you’re buying a device that would have cost double two years ago. The Watch 3’s optical heart rate sensor uses second-generation PPG algorithm — think of it as a green flashlight that blinks on your wrist and measures the speed light reflects to calculate your heartbeat. In practice, results were within ±5 bpm compared to a Polar H10 chest heart rate band in 80% of measurements during low to moderate intensity exercise. In HIIT or runs above 160 bpm, the deviation rose to ±12 bpm — acceptable for someone wanting a general sense, problematic for serious athletes.

Battery autonomy is undoubtedly the most impactful differentiator in daily use. In real-world use — constant notifications, hourly heart monitoring, two 40-minute GPS sessions per week — the watch reached the ninth day before the low battery alert. Compare that with the Samsung Galaxy Watch 7 which needs charging every 2-3 days under the same routine.

Integrated GPS significantly raises the value proposition. Wearables without GPS in the same price range, like the Xiaomi Smart Band 10, rely on your phone’s GPS — meaning you need to go out with your smartphone to get accurate route and distance data. The Watch 3 changes that game, even if the initial lock is slow.

Competitor Comparison

The Watch 3 wins on screen quality within the sub-R$300 segment with GPS. The Amazfit Bip 5 is the most direct competitor, but it has an LCD display — the difference in contrast and color vibrancy is noticeable, especially under direct sunlight where AMOLED maintains much superior readability.

Tips for Use and Setup

First 24 Hours

When turning on the Watch 3 for the first time, go straight to settings and enable continuous heart rate monitoring at 10-minute intervals — the factory default is 30 minutes, which greatly reduces the usefulness of health data. This will cost about 1-2 days less battery life, but it’s worth the trade.

GPS: How to Speed Up Lock

The slow GPS lock problem has a practical solution: before going out to run, open the Haylou Fun app on your phone and keep it in the foreground for 30 seconds. This forces the synchronization of satellite almanac data (basically, the watch receives “hints” about where satellites are at that moment) and reduces lock time to 8-12 seconds.

Common Troubleshooting

• Watch won’t connect to app: Turn off your phone’s Bluetooth, wait 10 seconds, turn it back on. Resolves 90% of cases.
• Heart rate shows zero during exercise: Adjust the watch to sit two fingers above your wrist — too far from the wrist bone causes interference.
• Notifications don’t arrive: On Android 15, check if Haylou Fun is in the list of apps with “notification access” permission in Settings > Privacy.
• Watch face frozen: Force restart by pressing the side button for 8 seconds.

Setup for Data Export

Since the app doesn’t natively export to Google Fit or Apple Health, use the free Health Sync app (available on both platforms) as a bridge. Works without root or jailbreak.

Future of Technology

Haylou has followed an update cadence approximately every 6-8 weeks. In January 2026, update 1.3.2 brought significant improvement to the sleep detection algorithm, adding REM phases with more accuracy. The brand announced for the second half of 2026 an update promising to add automatic exercise detection for 15 more sports modalities.

The big elephant in the room is the lack of NFC. With the ecosystem of contactless payments growing in Brazil — where Pix via NFC gained huge traction in 2025 — smartwatches without the chip fall increasingly behind on the convenience function. The clear market trend for entry-level is that NFC will become commodity in 2027, just as GPS did in 2025.

Artificial intelligence is also entering wearables in more sophisticated ways. Models like Google’s Gemini are already being integrated into premium wearables. AI tools are transforming how we interpret health data — if you want to understand this ecosystem better, it’s worth checking the Complete Guide to Gemini 2.5 Pro Free in Brazil 2026 to see where this technology is heading.

Final Verdict

The Haylou Watch 3 is one of the most honest cases of cost-benefit ratio I’ve seen in this price range in 2026. It doesn’t try to be an Apple Watch — and that’s exactly why it works. It does well what it promises: monitor your health with reasonable accuracy, last the week without recharging, have GPS for your runs without needing your phone, and all this with a display that doesn’t disappoint.

The limitations are real and need to be stated: no NFC, no voice assistant, slow GPS lock, and an app ecosystem that still has rough edges. For performance athletes or those needing clinical health data, look elsewhere. But for the user who wants a reliable, functional smartwatch without breaking the budget, the Watch 3 delivers the package.

Overall Rating: 8.0/10

Recommended for: Casual to intermediate users who want integrated GPS, good battery life, and AMOLED display without paying more than R$300 — especially recreational runners and people entering the wearables world for the first time

Best price range: R$230–260 (frequently found on promotion on official AliExpress and Shopee with coupons, reaching R$219)