Fitness watches that need your phone along for the ride to track a route rather than defeat the purpose—the Haylou Watch 4 solves that with independent 5-star GPS built directly into the watch. Head out for a run, walk, or cycle without your phone, and it still maps your route and motion trajectory accurately, genuinely freeing you from needing to carry anything else.
Bluetooth calling means you're not cut off from communication either—connect it to your smartphone, and you can make and receive calls straight from your wrist, whether that's mid-run or just moving around the house without your phone in hand. With 120+ sports modes on board, it adapts properly to whatever you're actually doing, rather than lumping every activity into one generic tracking mode.
Health tracking runs deep here too: heart rate monitoring, blood oxygen tracking, sleep monitoring, and stress level monitoring all work quietly in the background, building a genuine picture of your well-being across the day, not just during a workout. Step counting and daily activity tracking round out the everyday side, so it's just as useful sitting at a desk as it is out on a trail.
Beyond fitness, it covers the everyday smartwatch essentials properly—music controls, smartphone notifications, weather information, voice assistant support, and Find My Phone/Find My Watch for those moments when either goes missing. Pairing with the Haylou Fun app syncs all your activity data and unlocks additional connected features, and it works across both Android and iOS, so your choice of phone doesn't limit what the watch can do.
For anyone who actually runs, walks, or cycles without wanting to carry a phone just for GPS tracking, the Haylou Watch 4 is built specifically to solve that—while still covering everyday smart features properly.
Key Features
Independent 5-star GPS — accurate route tracking without needing your phone along
Motion trajectory recognition — precise tracking for outdoor activity
120+ sports modes — adapts to whatever activity you're actually doing
Bluetooth calling — make and receive calls directly from your wrist
Heart rate monitoring — continuous tracking throughout the day
Blood oxygen monitoring — keep an eye on a key wellness metric
Sleep monitoring — understand sleep quality, not just hours slept
Stress level monitoring — track patterns in daily stress
Step & daily activity tracking — covers everyday movement, not just workouts
Outdoor running, walking & cycling tracking — genuine outdoor activity support via built-in GPS
Music controls — manage playback without reaching for your phone
Smartphone notifications — stay on top of calls, messages, and alerts
Weather information — check conditions at a glance
Voice assistant support — hands-free access to your phone's assistant
Find My Phone / Find My Watch — locate whichever one's gone missing
Multiple watch faces — match the look to your style
Haylou Fun app support — sync activity data and access extra features
Compatible with Android & iOS smartphones — works with whichever phone you use
Frequently Asked Questions
It features independent 5-star GPS technology integrated into the device that allows tracking your route and movement without having your phone nearby. In other words, this watch is a perfect choice for exercising without carrying your mobile device.
Yes, it is possible to make or receive calls using the Bluetooth technology provided in the watch.
It has more than 120 sports modes that include many sports activities from outdoor jogging and cycling to indoor gym workout and beyond. Each mode is specifically designed to monitor the most important parameters of the activity.
Yes, the device is equipped with a stress level tracking feature that monitors the patterns in your heart rate variability during the whole day and helps you understand how stressed you are.
Yes, the Watch 4 works with the Haylou Fun app where all activity statistics are synced with the user, as well as all the other details regarding their health metrics. The app can be downloaded on both Android and iOS.
Indeed, blood oxygen saturation levels are among those that are tracked by the watch, in addition to heart rate and other health indicators of the body.
Yes, it is possible for me to use the music controls on the Watch 4, and thereby, control the music that I have on my phone from the watch.
Yes, there is the "Find My Phone" function available on the Watch 4. It will enable me to ring my phone even if it is in silent mode. There is a Find My Watch function as well, where the phone helps you find your watch.
Yes, it’s compatible with Android as well as with iPhone smart devices, which connect with the help of Haylou Fun software. Basic functions such as notifications, health metrics, and Bluetooth calling are available on both operating systems.
Yes, the Haylou Watch 4 provides weather forecast data on the smartwatch itself so you don’t need to download any special application for that.
Yes, apart from measuring steps taken and monitoring daily physical activity, this watch has the capability to track your sleeping patterns during nighttime. These two combined will give you a general overview of your physical state and activities throughout the whole day and not just while working out.
The main difference is in the presence of independent built-in GPS in the first watch, making it more suitable for outdoor runs, walks, or cycling without having a phone around. The Solar Pro model, in turn, is mainly characterized by improved display features and general smartwatch usage.
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