BIGGERFIVE Kids Smart Watch Review: a straightforward fitness watch that keeps kids moving without costing a fortune

I’ve had this BIGGERFIVE kids smart watch (the nylon blue one) on my kid’s wrist for a bit now, and I’ll be blunt: it’s not some high-end Apple Watch clone, but for the price it actually does its job pretty well. My main goal was simple: give my child something to track steps and sleep, with a few games, without handing them a full-on smartphone or a fragile adult smartwatch. On that, it delivers.

From day one, setup was fairly painless. You can use it without the app, which is nice if you just want a basic step counter and time display. With the app, you unlock more stuff like game control and watch faces, but you’re not forced into creating an account just to see the time. That’s already better than some so-called kids tech I’ve tried that won’t even start without an email and 20 permissions.

In daily use, my kid mainly looks at three things: steps, heart rate (because it looks cool, let’s be honest), and the puzzle games. The watch does those three things in a way that’s clear and simple enough for a 7–10 year old. It doesn’t feel like a toy that will be forgotten in a week, but it’s also not a medical device or a serious sports tool. It sits in the middle: good enough to encourage movement and routines, not accurate enough for someone training for a marathon.

If you expect precise health data and super polished software, you’ll be disappointed. If you just want a basic, kid-proof fitness watch with some fun extras, this one is pretty solid. It has flaws – the heart rate isn’t perfectly accurate, and the interface is a bit clunky in places – but considering the price and the target age (5–16), I’d say it gets the basic job done without drama.

In terms of value, this BIGGERFIVE kids watch sits in a sweet spot. It’s cheaper than most “big brand” smartwatches and also cheaper than many full GPS kids watches that try to replace a phone. For the price, you get a decent fitness tracker, a few games, waterproofing, and an app with parental controls. It’s not loaded with fancy features, but the basics are covered and, more importantly, they actually work reasonably well.

Compared to super cheap no-name kids watches you sometimes see online, this one feels more thought out. The battery life, comfort, and app control over games already put it a step above a lot of random plastic watches that die after a month. On the other hand, if you compare it to a second-hand Fitbit or Garmin, you might get more accurate tracking and a better app, but you’d lose the kid-focused stuff like built-in games and simple interface. Also, adult trackers are often less fun-looking for kids.

For parents, the main value is: it encourages kids to move more and gives them a gadget they can customize with watch faces and photos, without turning into a distraction machine. There’s no SIM subscription, no hidden costs, and the app is free. You can use it completely without the app if you want to keep things super simple, which is rare these days. That flexibility adds to the value.

It’s not perfect: heart rate and sleep accuracy are just okay, the interface is a bit basic, and it doesn’t do GPS tracking on its own. But given the overall package – durability, battery, comfort, features – I’d say it offers good value for money for families who want a simple kids fitness watch and don’t want to spend adult smartwatch prices. There is better tech out there, but at this price point, this one is a pretty solid deal.

Design-wise, this watch sits somewhere between a toy watch and a cheap adult smartwatch. The 1.8-inch rectangular screen is big enough for kids to tap without frustration, and the icons are clear and colorful. The resolution (240 x 280) is fine: not razor sharp, but text and numbers are easy to read. Brightness is okay indoors and still readable outside, though in full sun kids will sometimes tilt their wrist to see better. It’s not premium, but it’s not ugly either – it looks like a real smartwatch, which kids usually like.

The nylon blue strap is what makes it look more like a sports gadget than a plastic toy. It’s a single nylon strap with a buckle, so it wraps around the wrist more like a sports band than a stiff rubber strap. Visually, it’s neutral enough for both boys and girls. My kid liked that it doesn’t have cartoon characters all over it; it feels a bit more “grown-up,” which for older kids (8–12) is a plus.

The watch has one physical button on the side plus the touchscreen. The button has a slightly cheap feel, but it works fine: wake the screen, go back, that sort of thing. The casing itself is plastic, light, and obviously not premium, but for a kid watch that’s going to hit doors and playground gear, plastic is actually more practical. There are no sharp edges, and the back where the heart rate sensor sits is smooth.

Overall, the design is practical, not fancy. If you compare it to an Apple Watch, it clearly looks cheaper and bulkier. Compared to other kids fitness bands that look like chunky rubber toys, it’s actually a bit nicer and more “real watch”-like. So visually, I’d say it’s solid for the price and audience. Nothing special, but it doesn’t scream “cheap junk” either.

Battery life is actually one of the nice surprises. With a 300 mAh battery, I expected it to need charging every other day, especially with a biggish screen and heart rate monitoring. In reality, with normal kid use (steps on all day, heart rate on auto, some games, some screen-on time), we were getting 5–7 days on a charge pretty consistently. When my kid went heavy on games and kept checking the screen, it dropped closer to 4 days, but still, that’s not bad at all.

Charging is via a small USB cable with a magnetic connector on the back of the watch. It snaps into place easily enough, though you want to make sure it’s properly aligned or it won’t charge. From low battery to full, it took roughly 1.5–2 hours in my experience. We just got into the habit of plugging it in once a week, usually on a Sunday evening, and that was it. For a kids’ device, not needing to remember it every night is a big plus.

If you start turning things off – like reducing screen brightness, shortening screen timeout, or disabling constant heart rate – you can probably stretch the battery even more. But honestly, we didn’t baby it and it still did fine. The watch also doesn’t lose charge super fast in standby, so if your kid forgets to wear it for a day or two, it won’t be dead when they come back to it.

Overall, battery is one of the stronger points of this watch. It’s not magical, but it’s reliable and predictable. Compared to some cheap kids smartwatches that barely last 1–2 days, this feels a lot less annoying. You’re not constantly chasing the cable or dealing with a dead watch in the morning before school, and that takes a lot of friction out of using it long-term.

Comfort was a big point for me because kids are brutally honest: if something annoys them, they just stop wearing it. This watch is very light (around 40 grams), and with the nylon strap it sits snug without digging into the skin. My kid wore it basically all day – school, play, even sleeping – and didn’t complain about weight or itching. That’s already a win, because some silicone bands get sweaty and annoying after a few hours.

The nylon strap is soft straight out of the box, not stiff like some cheap bands that take a week to soften up. The buckle is a standard tang buckle, nothing fancy, but it holds fine and hasn’t popped open during playtime. The strap has enough adjustment holes to fit smaller kids’ wrists and still work for early teens. On a very small 5-year-old wrist, it might look a bit large, but it should still stay on. On my kid (around 7–8), it fits nicely and doesn’t slide around too much.

At night, the watch is noticeable but not unbearable. My kid kept it on for sleep tracking most nights. The back sensor area is flat enough that it doesn’t poke into the skin. The only slightly annoying thing is the screen lighting up if the wrist moves and the raise-to-wake feature is active. We ended up lowering brightness and tweaking screen timeout to make it less distracting at night. If your kid is sensitive to light when sleeping, you might want to turn that off.

In daily life – running, jumping, PE at school – the watch stayed put and didn’t cause any rashes or marks. The nylon material breathes better than thick silicone, so there’s less sweat trapped under the band. Overall, comfort is one of the strong points here. It’s light, soft, and after a little while, kids mostly forget they’re wearing it, which is exactly what you want from a gadget that’s supposed to stay on all day.

Durability-wise, this thing is clearly designed with kids in mind. The plastic case and nylon strap are not premium, but they do handle knocks and scrapes well. In our case, the watch has already met table edges, doors, and the usual playground equipment. So far, no cracks, no functional damage, just some light marks on the plastic if you look closely. For a kids’ watch that’s going to live a rough life, that’s exactly what you want.

The IP68 waterproof rating has held up in real life. My kid washed hands with it, played with water, took showers, and even did a short swim with it on. No water inside, no fogging under the screen, no weird behavior after getting wet. I wouldn’t push it with deep dives or long pool sessions every day, but for normal kid water contact (rain, splashes, occasional swim), it seems fine. This alone makes it way more practical than non-waterproof watches that you have to constantly take off.

The nylon strap also seems to handle sweat and dirt pretty well. It can get a bit grimy after a while, but you can wipe it down or rinse it, and it dries fairly quickly. The stitching hasn’t come apart, and the buckle hole hasn’t stretched out or torn yet. With some cheaper silicone bands, I’ve seen cracks within a few months; here, after repeated bending and pulling, it’s still holding up.

Obviously, if your kid is extremely rough on gadgets, anything can break, but for normal to slightly chaotic kid use, this watch feels robust enough. It’s not indestructible, but I’m not constantly worried it’s going to die from a small fall. For the price range, I’d say durability is above average. It feels like a product that will last at least a school year or two, which is about as much as I realistically expect from a kids’ gadget that gets worn daily.

Let’s talk performance. For step counting, it’s fairly close to reality, but not perfect. Compared side-by-side with my own adult fitness tracker, the BIGGERFIVE watch usually showed a bit fewer or sometimes a bit more steps, but the difference was within a few hundred over a full day. For a kid, that’s fine. It clearly shows if they’ve been active or mostly sitting. My kid liked checking if they hit their step goal, which actually got them to run around a bit more in the evening to “beat yesterday”. So as a motivation tool, it works.

Heart rate is where you see the limitations. One Amazon reviewer mentioned it being about 10–15 points off on the systolic number (they were basically saying it’s not medically accurate), and I agree with the idea: it’s okay for a rough idea, but not something you’d use for health decisions. When my kid was resting, the watch showed a reasonable value, in the same ballpark as my own device. During movement, it sometimes jumped around or lagged. For kids, they mostly see the heart beating animation and think it’s cool, so I wouldn’t stress about precision here.

Sleep tracking is decent but basic. It catches when the kid generally falls asleep and wakes up, and it splits the night into light/deep sleep in the app. Don’t expect scientific accuracy, but you can see if they are going to bed too late or waking up a lot. It’s more of a rough indicator than a detailed analysis tool. The sports modes (walking, running, cycling, basketball, etc.) are there, but honestly my kid barely uses them. They mostly just wear it and let it auto-count steps.

The 5 puzzle games run smoothly and didn’t crash. They’re simple but actually useful to kill a few minutes in the car or waiting somewhere. Performance-wise, the watch doesn’t lag much in the menus; swiping between screens is okay, not ultra smooth but not frustrating either. The BIGGERFIVE app is fairly straightforward once you’ve set it up – you can control game access, change watch faces, and see activity. Sync is not instant all the time; sometimes you wait a few seconds for data to appear, but it’s acceptable. Overall, performance is good enough for kids, with the main weakness being that health metrics are more “approximate” than serious.

On paper, this watch tries to be a mini fitness tracker for kids. You get step counting, distance, calories, heart rate, sleep tracking, a bunch of sports modes (they say 80, but realistically you’ll use maybe 3–5), and 5 puzzle games. There’s also an alarm, stopwatch, timers, and different watch faces. It connects via Bluetooth to the BIGGERFIVE app on Android or iOS if you want more control and data history. No SIM, no calls, no messages – it’s not a phone watch, which for some parents is actually a plus.

In practice, my kid mostly uses: steps, heart rate, time, and games. The rest (sports modes, detailed sleep graphs) is more for parents who like checking stats in the app. The watch syncs with the app when you open it, and you can see daily and weekly activity. It’s not as detailed as an adult fitness tracker, but you can clearly see if your kid is moving or basically sitting all day. The IP68 waterproof rating is legit enough for handwashing and splashes; mine survived showers and a short swim without any drama.

The built-in games are simple little puzzle/arcade things. Think basic reaction and calculation games, not full-blown gaming. They do their job: give the kid something to play with for a few minutes without turning the watch into a distraction bomb. Through the app, you can lock the games during school hours, which is honestly one of the best features. You set the schedule, and during those hours the games menu just doesn’t work.

What it does not do: there’s no direct GPS tracking on the watch itself (it uses the phone for GPS if you log activities), no calling, no messaging, no camera. So if you’re looking for a safety tracker to locate your child at any time, this is not it. It’s more like a kid-friendly fitness band with a bigger screen and games. For that role, it’s decent. For full parental control / GPS tracking, you’ll need a different product class.