Smartwatches
JYUAJOI Fitness Tracker Smart Watch
$42.00
Price captured 2026-09-22 · check Amazon for the current price.
One of the two cheapest trackers in this comparison, with a 5-7 day battery rating.
Price history
Editor scores (0–10) — not a manufacturer spec.
| Display size | 1.47 in |
|---|---|
| Display type | Curved LED, color touchscreen |
| Battery life | 6 days |
| Water resistance | IP68 |
| Built-in GPS | — |
| Heart rate monitor | ✓ Yes |
| OS | — |
| Weight | — |
Editor's take
An entry-level fitness tracker at $42 with continuous heart rate, blood oxygen and sleep monitoring over Bluetooth 5.0, rated 5-7 days of battery on a 2-hour charge — but with only 11 reviews so far and no built-in GPS.
The JYUAJOI tracker covers the basics of a budget fitness watch: 24/7 heart rate and blood oxygen monitoring, automatic sleep-stage tracking, and 24+ built-in sport modes with call/message alerts relayed from a paired phone. The 1.47-inch curved LED display supports over 200 watch faces, including custom photos. Amazon's spec table confirms Bluetooth 5.0 and compatibility with Android 10.0+ and iOS 10.0+ — notably, it's explicitly not compatible with PCs, iPads or tablets.
Battery life is rated at 5-7 days per charge, with a full charge taking about 2 hours. There's no GPS chip built in and none mentioned for phone-relayed mapping either, so this is a step below the Bestinn tracker scraped earlier in that respect. IP68 covers dust and water resistance, though (as with the other budget trackers here) no specific depth rating is given.
With only 11 reviews, its 4.8-star average is encouraging but statistically thin — worth treating as an early signal rather than a settled verdict, similar to some of the newer Apple Watch listings in this batch.
Pros
- One of the cheapest options in this comparison at $42
- 5-7 days of battery life on a 2-hour charge
- 24/7 heart rate and blood oxygen monitoring with sleep-stage tracking
- 1.47-inch curved display supports custom photo watch faces
Cons
- Only 11 reviews so far — the 4.8-star average is too small a sample to rely on
- No GPS functionality mentioned, not even phone-relayed mapping
- No named operating system — proprietary companion app only
- Not compatible with PCs, iPads or tablets per Amazon's own spec table
Ideal for: First-time smartwatch buyers who want basic 24/7 health tracking at the lowest possible price and don't need GPS or app-store extensibility.
Reviews
Only 11 reviews so far, averaging 4.8 out of 5 — encouraging but too small a sample to call it proven.
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