(checked 2026-10-10)Small sample: 1,209 ratings.
A $99, subscription-free Whoop alternative with detailed sleep and recovery data in the Zepp app and 8 to 12 days per charge. Its automatic workout detection was unreliable in Tom's Guide's testing (it once logged a car drive as part of a hike), and Wirecutter finds its app less detailed than Whoop's.
Subscription: None: no subscription required (Tom's Guide, Wirecutter)
Top complaints
- Unreliable automatic workout detection
Tom's Guide's tester saw it log short bike rides but miss a full yoga class, and fold a car drive into a hike at 57 mph. She resorted to starting every workout manually. Amazon owners are mixed on accuracy, with some reporting inaccurate data.
- Sleep tracking or the strap fails for some owners
Amazon's review summary says sleep tracking stops working after a week for some customers, some find the strap itchy, and some say it doesn't work for them.
- Battery and charger quirks
Wirecutter got eight days against the 10-day claim. Tom's Guide calls the charger 'incredibly losable'.
What owners love
- No subscription, low price
Tom's Guide calls it the most affordable Whoop alternative it has seen at $99, and Wirecutter notes the Zepp app needs no subscription.
- Detailed sleep and recovery data
Tom's Guide says it has the best sleep tracking of any Amazfit device, catching even brief wake-ups, plus Biocharge and Exertion scores. Amazon owners say its heart-rate monitoring is accurate.
- Good battery and comfort
Tom's Guide went 12 days between charges and found it really comfortable on 5.5-inch and 7-inch wrists. Amazon owners praise the battery life.
- You rely on automatic workout detection
- You want Whoop-level depth
- You tend to lose small chargers
- Whoop-style recovery data without a subscription
- Detailed sleep tracking
- Budget screenless tracking
Scores (tap for why)
What experts say
- Tom's Guide (Amazfit Helio Strap review): Subscription-free Whoop alternative with loads of metrics and reliable sleep tracking. The cons are unreliable workout detection for some activities and a losable charger.
- Wirecutter (NYT): In 'The competition': half the cost of a year of Whoop, with 56 workout types and no subscription, but the battery lasted 8 days and the Zepp app isn't as detailed as Whoop's.