1 / 7AutrefoisElf Smart Ring Gen 4 Fitness Tracker
Tracker: The AutrefoisElf Smart Ring Gen 4 is a screen-free Bluetooth wearable for fitness and wellness tracking. Its listing describes heart-rate, sleep, stress, blood-oxygen, activity and cycle tracking, but the battery-life claims differ between the details and feature copy. Confirm sizing carefully, since the listing recommends its own sizing chart or kit.
At a glance
- The listing describes 24/7 heart-rate, HRV, sleep, stress and blood-oxygen tracking. Blood-oxygen and stress tracking must be enabled in app settings, according to the listing.
- Feature copy claims 140+ sport modes, sleep-stage tracking and cycle tracking. The technical details also list activity tracking and daily workout memory.
- Bluetooth connection and listed compatibility with Android, iOS and HarmonyOS require a paired smartphone or tablet for app-based information.
- The listing gives ring sizes 6–14 and recommends measuring carefully or using its sizing kit before purchase.
Often bought together
Pros and cons
Pros
- No display keeps the ring focused on wearable tracking rather than on-wrist viewing.
- Listed smartphone compatibility spans Android, iOS and HarmonyOS.
- The listing describes app-based tracking without a recurring subscription fee.
Cons
- No GPS is listed, so GPS-based location tracking is not provided by the ring itself.
- Without a display, checking tracking information requires a compatible device and app.
Technical specifications
21 specifications| Brand | AutrefoisElf |
|---|---|
| Model | Smart Ring Gen 4 |
| Display | No Display |
|---|
| Wireless connection | Bluetooth |
|---|---|
| Input | Gesture |
| Compatible devices | Smartphone, Tablet |
| Operating systems | Android 8.0+, Apple iOS 10.0+, HarmonyOS |
| Battery life listed | 5 days |
|---|---|
| Battery capacity | 20 milliamp_hours |
| Battery type | Lithium Ion |
| Charge time | 1 hours |
| Form factor | Round |
|---|---|
| Weight | 4.5 g |
| Dimensions (D × W × H) | 0.2"D x 0.2"W x 0.2"H |
| Water resistance listed | Waterproof |
|---|---|
| Water resistance depth | 50 meters |
| Storage | 4 MB |
|---|
| Metrics measured | Heart Rate Monitor |
|---|---|
| Additional features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Multisport Tracker |
| GPS | No GPS |
| Color | Rosegold |
What to know before buying
Listing details to confirm
Battery claims are inconsistent: the technical details list 5 days, feature copy says 3–5 days per charge and up to 30 days total with the charging case, and another feature describes a 1-hour charge. The 50-meter waterproof claim and 140+ sport-mode count appear in feature copy, while the technical details only say Waterproof and Multisport Tracker. Treat these as listing claims, not independently verified performance. The ring is intended for everyday wellness tracking, not medical diagnosis. Size carefully because the seller says its sizing may differ from standard jewelry sizes.
What’s in the box
Included- AutrefoisElf smart ring
- Cable
- Charging case
- User manual
- Quick guide
Who is it for?
A good fit for
- Buyers seeking a screen-free wearable for sleep, heart-rate and daily activity tracking.
- People who want cycle tracking and listed compatibility with Android, iOS or HarmonyOS devices.
- Buyers willing to size their finger using the supplied chart or a sizing kit before ordering.
Less suited to
- Anyone who needs GPS from the ring itself or a display for viewing data on the wearable.
- Buyers who need a confirmed, single battery-life figure or independently established water-resistance performance.
Customer reviews on Amazon
- 5 stars
61% 61% - 4 stars
18% 18% - 3 stars
4% 4% - 2 stars
4% 4% - 1 star
13% 13%
Customer feedback highlights the ring's appearance, functionality and perceived value. That feedback may matter to buyers considering a compact, screen-free tracker, but it does not establish tracking accuracy or resolve the listing's conflicting battery-life claims. Ratings are generally positive, though a noticeable minority are one-star, so experiences are not uniformly favorable.
Positive themes
- Customers describe the design positively.
- Customers report that the ring is functional and practical.
- Customers express positive views about its value for money.
Frequently asked questions
Does the ring have a screen or GPS?
The listing specifies No Display and No GPS. It connects by Bluetooth and lists smartphone and tablet compatibility.
How long does the battery last?
The technical details list 5 days. Feature copy separately claims 3–5 days per charge and up to 30 days total with the charging case, so the figures are not consistent.
What ring sizes are available, and how should I choose?
The feature copy lists sizes 6–14 and recommends measuring your finger against the seller's chart or using its sizing kit. It warns that its sizing standard may differ from standard jewelry rings.
Does the listing say a subscription is required?
No. The listing claims app-based tracking without a monthly subscription fee.
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Offer details
- The listing describes blood-oxygen and stress monitoring as requiring manual activation in app settings.