A smart watch is the one category where the gap between the cheapest and the most expensive is almost entirely software. The screen, the heart-rate sensor and the battery in a twenty-dollar watch come from the same handful of Chinese factories that supply the eighty-dollar one. What you pay extra for is an app that works, firmware that gets fixed, and sensors that were actually calibrated.
That makes this a category where cheap is often the right answer — as long as you know which three things to check first.
The shortlist right now
Live prices, deepest discount at the top. These refresh automatically, so the numbers below are what sellers are asking today.
| # | Product | Price | Was | Off |
|---|---|---|---|---|
| 1 | LIGE 2021 New Smart Watch Men Full… | $27.77 | $139 | -80% |
| 2 | HERALL Smart Watch Heart Rate Monitor | $16.85 | $76.60 | -78% |
| 3 | HERALL Smart Watch Bluetooth | $25.65 | $117 | -78% |
| 4 | SANLEPUS Smart Watch Sport Heart Rate Monitor | $26.99 | $89.97 | -70% |
| 5 | Amazfit Stratos Smartwatch GPS Heart Rate | $65.99 | $200 | -67% |
| 6 | Amazfit GTS Smart Watch 5ATM | $78.00 | $200 | -61% |
| 7 | Amazfit Band 5 Smart Bracelet | $40.00 | $99.99 | -60% |
| 8 | Global Version Xiaomi Smart Band 9 1.62''… | $34.55 | $71.98 | -52% |
| 9 | Xiaomi Watch S3 | $96.75 | $179 | -46% |
| 10 | Smart Watch YNRP990 for Android & iOS | $23.98 | $34.26 | -30% |
LIGE 2021 New Smart Watch Men Full Touch Screen Sport Fitness Watch IP67 Waterproof
The deepest cut on this page: $111 off the seller's list price.
HERALL Smart Watch Heart Rate Monitor
The cheapest way in here, at $16.85.
HERALL Smart Watch Bluetooth
$90.95 off, a 78% cut from the seller's list price.
SANLEPUS Smart Watch Sport Heart Rate Monitor
$62.98 off, a 70% cut from the seller's list price.
Amazfit Stratos Smartwatch GPS Heart Rate
$134 off, a 67% cut from the seller's list price.
Amazfit GTS Smart Watch 5ATM
$122 off, a 61% cut from the seller's list price.
Amazfit Band 5 Smart Bracelet
$59.99 off, a 60% cut from the seller's list price.
Global Version Xiaomi Smart Band 9 1.62'' sports21-day battery life
$37.43 off, a 52% cut from the seller's list price.
Xiaomi Watch S3
The most expensive pick on this page at $96.75, down from $179.
Smart Watch YNRP990 for Android & iOS
$10.28 off, a 30% cut from the seller's list price.
Keep reading
Prices are the ones recorded when this page last refreshed and can change at any time. Ali Best is an independent site and is not operated by any marketplace; buying through a link here may earn us a commission at no extra cost to you.
Check these three before anything else
1. Your phone
Almost every budget watch is built Android-first. On Android you get notifications, replies in some apps, and full control. On an iPhone you will get the time, your steps, your heart rate and incoming notifications — but usually no replies, no music control and no third-party app support, because Apple does not open those to outside watches.
This is not a fault in the watch. It is how iOS works, and no seller will tell you. If you carry an iPhone and want more than notifications, you are buying an Apple Watch, not one of these.
2. The app
Budget watches run on a small set of white-label apps — Da Fit, FitCloudPro, GloryFit, Zeblaze and a few more. Before you order, search the app name from the listing in your phone’s store and read the reviews. A watch with good hardware and an abandoned app is a bracelet.
Also check the app is still updated. An app last updated three years ago will eventually stop working when your phone updates, and the watch dies with it.
3. The charger
Nearly all of these use a proprietary magnetic puck, not USB-C. Lose it and the watch is finished, because nobody sells a replacement for a model with no brand name. Order a spare in the same order if the seller offers one — it costs a dollar or two.
What the price bands actually get you
- $15 to $30 — a bright screen, step counting, heart rate, notifications. Battery usually three to seven days in real use. Build quality is plastic and the strap is the first thing to go. At this price a watch that lasts a year has paid for itself.
- $60 to $80 — the named brands. Real GPS built in, proper water rating, a company that ships firmware updates, and sensors that were calibrated against something. The Amazfit models in the table are in this band and are the sensible choice if you actually train.
The gap between the two bands is wider than the price suggests, and it is mostly about whether the numbers mean anything.
Be honest about the health sensors
- Heart rate — reasonable at rest and while walking. Unreliable during hard exercise, when the watch moves on your wrist. Wear it a finger’s width above the wrist bone and snug, which fixes most complaints.
- Step count — close enough to be useful. It will count some hand movements as steps.
- Sleep tracking — good at telling you when you fell asleep and woke up. The deep/light/REM breakdown is an estimate, not a measurement.
- Blood oxygen (SpO2) — a rough indicator on a cheap watch. Do not use it to make a decision about your health.
- ⚠️ Blood pressure and blood glucose — no wrist watch at any price measures these without a cuff or a blood sample. If a listing claims non-invasive blood sugar, the number it shows is generated, not measured. Treat that claim as a reason to distrust the rest of the listing.
None of these are medical devices, and none of them are sold as such. Useful for spotting trends over weeks. Not useful for diagnosing anything.
Water resistance, decoded
- IP67 / IP68 — rain, hand washing, sweat. Not swimming.
- 3ATM — splashes only, despite the name. Still not swimming.
- 5ATM — the real threshold for swimming. If the listing does not say 5ATM, assume the answer is no.
- “Waterproof” with no rating at all — means nothing. Keep it dry.
Hot water and steam break the seals on all of them, so take the watch off in the shower and the sauna whatever the rating says.
The things that actually go wrong
- The strap, not the watch. The cheap silicone tears at the pin holes within months. Check the lug width in the listing (20mm and 22mm are standard) and you can replace it for a couple of dollars with anything off the shelf. A watch with a sealed non-standard strap is a worse buy at the same price.
- Battery life is quoted in standby. “Thirty days” means thirty days with the screen off and everything disabled. Real use with notifications and always-on heart rate is three to seven days on most of these.
- The always-on display eats everything. It is the single biggest drain. Leave it on raise-to-wake and the battery roughly doubles.
- Screen brightness in sun. The cheapest panels wash out outdoors. If the listing states a nits figure, higher is better; if it states nothing, expect to shade it with your hand.
- The wrong size. These are often larger than the photos suggest. Check the case width in millimetres against a watch you already own before ordering.
Frequently asked questions
Will it work with my iPhone?
Partly. Time, steps, heart rate and notifications yes. Replying to messages, controlling music and third-party apps mostly no. That limit comes from iOS, not from the watch.
Can I make calls from it?
Models that say “Bluetooth call” have a speaker and microphone and route the call through your phone. Sound quality is adequate for a short call in a quiet room and poor outdoors. A watch cannot make a call on its own unless it has its own SIM, which almost none of these do.
Does it need the phone nearby?
For notifications, yes. Step counting and heart rate keep working alone and sync when you reconnect. Only watches with built-in GPS can record a route without the phone — check the listing says GPS, not “connected GPS”, which means it borrows the phone’s.
How long does delivery take?
Two to five weeks on free standard shipping to most countries, three to seven days on paid express from a local warehouse. The listing shows both with the estimated date before you pay.
The short version
If you want notifications on your wrist and a rough step count, buy at the bottom of the range and do not overthink it — the twenty-dollar watches do that job. If you train and want the numbers to mean something, jump straight to the named brands around seventy dollars; there is very little worth buying in between. Check your phone, check the app, and order a spare charging cable while you are there.
