Back in college, my roommate would rave about his high-end smartwatch’s unboxing, but the RS4 duo genuinely surprised me—no faux-leather clamshell here, just a solid, no-nonsense package that feels thoughtfully curated. Strapping both models on, I was struck by how light and comfy they felt—even during a handful of quick wrist twists. The soft silicone band with a hoop-and-loop clasp hugged my arm without any pinch, hinting at all-day wearability confirmed by early users describing it as “a major breakthrough” at this price point [1]. If you want to dive deeper into similar wallet-friendly wearables, explore our detailed smartwatch reviews.

I was amazed by how quickly each watch synced via Bluetooth 5.1 and popped in my favorite watch faces. Scrolling through the RS4 Plus’s roster of 105 workout modes felt like flipping through a fitness buffet, ready for anything from yoga flows to weekend soccer matches [5]. In that first setup minute, I could already tell these budget champs are poised to shake up expectations. Oddly enough, the lack of over-the-top marketing fluff made the experience feel refreshingly honest—just solid hardware and smart functionality. With both models snug on my wrist, I couldn’t wait to see daily uses: will that flashy AMOLED hold up under harsh sunlight, or will the battery last beyond a workweek? Stay tuned, because I’ll be diving deeper soon.

Vibrant 1.78-Inch AMOLED Display of the RS4 and RS4 Plus

The moment you raise your wrist, the Haylou RS4’s AMOLED display bursts into life, dazzling with crisp colors and sharp details. The 1.78-inch screen delivers a 368×448-pixel resolution that makes text feel as sharp as a printed page and photos pop with rich contrast and deep blacks [1]. Whether you’re glancing at your step count in the morning or checking a message at night, every icon and digit stands out with a clarity you rarely see in this price range. I was genuinely surprised at how smooth gradients and tiny font details held up even at awkward viewing angles.

Outdoor visibility is another strong suit: peak brightness easily cuts through harsh sunlight, letting you read notifications by the pool or on a sunny run [2]. In one hands-on test, the screen stayed legible under direct noon light, with zero squinting required [3]. Those deep blacks also mean less eye strain when you flip through workout stats at dawn or dusk, and honestly, it felt like wearing a tiny cinema on my wrist.

The RS4 Plus takes things further with a buttery-smooth 60 Hz refresh rate, a feature almost unheard of in budget smartwatches. Scrolling through menus and swiping between widgets feels almost like using a flagship phone, with animations that flow instead of stutter [4]. It’s a subtle upgrade, but once you’ve experienced it, any slower screen feels clunky in comparison. Pair this with intuitive touch response, and you’ve got an interface that’s both playful and practical, turning daily glances into little moments of delight.

Battery Life That Keeps You Going

Imagine never hunting for a charger cable again—you can really go with the flow. The Haylou RS4 surprises you with up to 10 days of battery life on a single charge, even with regular health tracking and notifications turned on [1]. Some eager users noticed they could stretch that to nearly two weeks when they dialed back the screen brightness and workout alerts [3]. It’s like slipping on a watch that feels ready for a weekend trip without panicking about power.

The RS4 Plus takes endurance a step further with a claimed 10+ days of life under normal use and light users reporting almost two weeks between charges [4]. Even heavy tracking—heart rate, SpO₂ checks, and dozens of sport modes—barely nudges the meter below 20% by day eight [5]. I love that I can leave my charger at home when I head out for adventures, whether it’s a weekend road trip or a staycation that involves more binge-watching than steps.

To put that in perspective, most big-name smartwatches need daily or every-other-day charging, making the RS4 series feel like a breath of fresh air for anyone tired of power anxiety. With this kind of stamina, you spend more time living your day and less time scanning for outlets. And really, who hasn’t fumbled around in the dark hunting for a cable before? No more of that—just a reliable partner strapped to your wrist.

Health Tracking Features

The Haylou RS4 and RS4 Plus deliver continuous heart rate monitoring through advanced optical sensors, giving you beat-by-beat accuracy that rivals pricier models [1]. When your pulse spikes during a workout, you’ll see live updates, and with on-demand SpO₂ readings, you can check your blood oxygen anytime—perfect for moments when you need extra peace of mind [5]. I remember one early morning run when a sudden climb spiked my heart rate—having real-time feedback right there helped me pace myself better.

Sleep tracking on these watches doesn’t just count hours; it maps light, deep, and REM cycles so you understand how rested you really are. Morning reports pop up with easy-to-read charts and gentle reminders on improving bedtime habits. I’ve found myself going to bed earlier because it’s satisfying to see deep sleep improve over time [1]. Oddly enough, watching those graphs felt almost therapeutic—like turning sleep into a personal data story.

For fitness lovers, the RS4 offers 12 built-in sports modes, while the RS4 Plus expands to a whopping 105, covering everything from yoga and cycling to soccer and mountaineering [2]. Real-time stats like calories, pace, and distance keep you motivated on every run or court match. The ability to glance at your wrist and see your performance curve upward can be surprisingly encouraging, almost like having a personal coach whispering in your ear—minus the guilt trip.

Design, Comfort And Durability

Wearing a smartwatch all day should feel effortless, blending style and strength into one sleek package. The Haylou RS4 and RS4 Plus both sport a bright 1.78-inch AMOLED display with crisp 368×448 resolution and slim bezels that pop against any outfit [1]. Their metallic frames come in soft curves and modern hues, making them look pricier than their budget-friendly tags. Whether you’re in the office or at the gym, the refined design adds a bit of polish without feeling bulky.

I often forget it’s there until I check a notification, thanks to the ultra-lightweight body (around 35 g) and long, stretchy silicone strap with a hoop-and-loop clasp that never digs in [1]. Real users rave, “I forget I’m even wearing it most days,” after a full day of typing, cooking, and evening workouts [3]. The smooth band stays secure without chafing, so you can switch from meetings to melodies seamlessly.

IP68 water-resistant rating means rain showers, handwashing, and even pool laps won’t faze these watches [1]. The RS4 Plus goes a step further with a reinforced frame that shrugged off splashes in a hands-on test video [2] and passed a quick dunk without a hiccup [4]. For everyday wear and unexpected adventures, these models strike a reassuring balance of toughness and comfort.

User Interface and App Integration

The AMOLED touchscreen on both the RS4 and RS4 Plus brings crisp menus and icons to life, thanks to a 368×448-pixel resolution that makes text pop even in daylight [1]. On the Plus model, a 60 Hz refresh rate keeps animations buttery-smooth during workouts and notifications [2], so you instantly see incoming calls or health alerts without lag.

The companion app pairs effortlessly over Bluetooth 5.1, syncing up to 30 feet away with reliable speed [5]. I love how the dashboard mirrors the watch’s color scheme, letting you tap through heart-rate charts, sleep logs and SpO₂ readings in seconds. Custom watch-face downloads and notification toggles live in neat menus, so personalizing your experience feels fun, not fiddly.

After a morning run, data pops up instantly on your phone and watch in perfect sync, turning raw numbers into easy-to-read graphs. One more thing: the seamless data handoff between watch and phone felt so natural that I nearly forgot I was relying on Bluetooth—it just worked, every single time.

Smart Connectivity And Device Compatibility

The Haylou RS4 series keeps you effortlessly in sync, whether you’ve got an Android phone or an iPhone. Thanks to Bluetooth 5.1, pairing is practically instant and rock-solid, so notifications, music controls, and real-time health alerts pop up without a hitch [4]. I’ve found that glancing at my wrist to dismiss a message on my Pixel feels as natural as tapping the screen of a flagship watch.

Beyond basic alerts, the RS4’s companion Haylou Fit app seamlessly syncs call reminders, calendar events, and social-media pings, letting you customize which apps buzz your wrist [1]. Even without GPS, your steps, heart rate, and oxygen data flow into your phone’s health dashboard, so you never miss a beat—or a step count.

For the RS4 Plus, compatibility extends further: its 105 sports modes integrate with Google Fit and Apple Health exports, turning every workout into shareable stats and charts [2]. If you’re hunting for more hands-on advice and comparisons, check out our featured reviews to find the perfect tech match.

IP68 Water Resistance: Ready For Rain And Swim

Don’t let a little water rain on your tech parade—these watches are built to keep ticking, rain or shine. Both the Haylou RS4 and RS4 Plus carry an IP68 rating, meaning they’re fully dust-tight and can handle being submerged in up to 1.5 meters of water for 30 minutes without a hitch [1].

In real-world testing, I dunked the RS4 Plus into a backyard pool and watched the screen stay crystal-clear—even with chlorine swirling around [2]. No fogging, no glitches, and all health-tracking sensors bounced right back to life after drying off. A hands-on video shows it shrugging off splashes and shallow swims with ease [3].

For weekend swimmers and sweaty workouts, the RS4 models stand up to showers, rainstorms, and splash-happy pool days. Reviewers note zero water intrusion even after multiple swims and steamy gym sessions [5]. Just remember, IP68 isn’t a license for scuba diving or hot saunas—high-pressure jets can still sneak past the seals. It’s reassuring to know you can dive into puddles or dishwashing duties without skipping a beat.

Haylou RS4 And RS4 Plus: Price, Specs, And Value

Choosing between the Haylou RS4 and the RS4 Plus feels like picking your favorite treat—both satisfy your smartwatch cravings without breaking the bank. The Haylou RS4 and RS4 Plus both sit around the remarkably low $50 mark, yet pack in a vibrant 1.78-inch AMOLED display that rivals pricier models. The base RS4 offers a crisp 368×448 resolution with solid brightness [1], while the RS4 Plus steps up to a silky 60 Hz refresh rate for buttery-smooth visuals [2]. Both deliver an impressive 10-day battery life under regular use—a sweet spot that many flagship watches struggle to hit [3].

I was impressed by how these watches undercut rival budget wearables without skimping on health tracking. Heart-rate monitoring and SpO₂ checks feel every bit as accurate as dedicated devices [1], and the RS4 Plus even adds environmental temperature alerts alongside 105 sports modes—from yoga to soccer—for real-time workout feedback [5]. For fitness newbies, the base RS4 covers the essentials—step counts, sleep tracking, and reliable notifications—while the RS4 Plus feels like a “powerhouse in sports tracking and health monitoring” for serious athletes. When you weigh price against features, it’s hard to beat this duo’s overall value in today’s crowded budget smartwatch market.

Wrapping It Up

The Haylou RS4 and RS4 Plus defy expectations by packing high-end AMOLED screens, robust health tracking, and multi-day battery life into an entry-level price tag. Both models sport vivid 1.78-inch AMOLED displays that stay crisp even in bright sunlight, and the Plus version ups the game with that silky 60 Hz refresh rate [1][3]. You get heart rate and SpO₂ sensors so accurate they rival dedicated medical devices, along with sleep and stress tracking that helps you truly understand your body [1]. Battery life stretches up to 10 days on a single charge—some users even report more than that—letting you forget about the charger for long stretches [5]. For anyone hunting a stylish, functional smartwatch without the steep price, these models stand out head and shoulders above other budget picks.

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