Fitness Trackers / Polar Loop (2025) vs Amazfit Helio Strap (2025)
Polar Loop (2025) vs Amazfit Helio Strap (2025)
Amazfit Helio Strap (2025)
A WHOOP-shaped band with no membership — the subscription trap's cheapest antidote.
Wins overall by 0.1 points
Quick Verdict
This is close. The Amazfit Helio Strap (2025) edges ahead by 0.1 points, but that margin is inside the noise — the Polar Loop (2025) is a defensible pick on its own terms. WHOOP's format with Polar's science and no membership — but $200 and no GPS chip.
The Polar Loop (2025) and Amazfit Helio Strap (2025) are both current-generation fitness Tracker models, and the Amazfit Helio Strap (2025) is $100 cheaper than the Polar Loop (2025) ($99.99 vs $199.99). On Battery Life, the Amazfit Helio Strap (2025) leads (8.5 vs 6.0/10) — real endurance once continuous heart rate, SpO2 and the always-on display are enabled, not just the headline figure.. On App & Data Portability, the Polar Loop (2025) leads (8.5 vs 6.0/10) — quality of the companion app and whether you can get your own data out in a documented format.. On Value, the Amazfit Helio Strap (2025) leads (9.0 vs 6.5/10) — what the first year genuinely costs — purchase price plus any subscription needed for the advertised features.. Overall, the Amazfit Helio Strap (2025) scores 6.3/10 across our 8 scoring categories versus 6.2/10 for the Polar Loop (2025), though the gap is close enough that your specific use case should decide it. Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Polar Loop (2025) | Amazfit Helio Strap (2025) |
|---|---|---|
| Price | $199.99 | $99.99 |
| Release Year | 2025 | 2025 |
| GPS | None — no GPS chip. The Polar Flow app can use the phone's GPS when you start an outdoor session manually | None — no GPS chip. Outdoor workouts borrow the phone's GPS through the Zepp app |
| Display | None — screenless; everything is read in Polar Flow | None — screenless; all data is read in the Zepp app |
| Rated Battery Life ( days) | 8 | 10✓ |
| What the Battery Claim Assumes | Polar rates up to 8 days with continuous HR active; the band holds about four weeks of data if it goes unsynced | Amazfit rates 10 days with continuous HR on; Tom's Guide got 12 days in review testing. Recharge takes under 2 hours |
| Subscription Model | None. Polar states full access to every feature from day one with no monthly fee — the explicit anti-WHOOP position | None. Every metric the strap produces is free forever — this is the device's entire pitch against WHOOP |
| Annual Subscription Cost ($) | 0 | 0 |
| Water Resistance | WR30 — Polar rates it for bathing and swimming, a weaker rating than the 5 ATM bands here | Amazfit markets it as sweat- and shower-safe; a formal ATM rating was not stated in the retail listings consulted |
| ECG / AFib & FDA Status | No ECG hardware and no AFib detection | No ECG hardware and no AFib detection |
| SpO2 Sensor | Not listed by Polar for the Loop — the sensor package is optical HR, HRV and accelerometer | Yes — blood oxygen via the Zepp app |
| Phone Compatibility | iOS and Android via Polar Flow | iOS and Android via the Zepp app |
| Charger | Proprietary Polar Charge 2.0 USB-C cable (included) | Proprietary magnetic charging clip |
| Data Export | Strongest in the screenless class — Polar Flow exports sessions as TCX/GPX, offers a full account data export and a documented AccessLink API | Zepp syncs to Strava, Google Fit and Apple Health; Amazfit does not publish a documented bulk-export format |
| Warranty | 24 months | 12 months |
| Colors | Black, Greige, Blue | Black |
Category Scores
Tracking Accuracy
The Polar Loop (2025) leads clearly here, 8.0 against 7.0 — a 1.0-point margin on how closely steps, heart rate and sleep match reference devices — and how badly the optical sensor falls apart at high intensity.. If that is what you are buying for, the Amazfit Helio Strap (2025) does not close the gap elsewhere.
Subscription Freedom
The Polar Loop (2025) and Amazfit Helio Strap (2025) are level here, at 9.5/10 each. the category's trap dimension: how much of what you paid for keeps working without a membership. A 10 means nothing is paywalled; a 1 means the hardware is unusable the moment you stop paying. is not what separates these two — look to the categories where the scores diverge.
Phone Independence
The Polar Loop (2025) leads clearly here, 2.5 against 2.0 — a 0.5-point margin on how much the device can do with the phone left at home — a real GPS chip and on-wrist readouts score high, connected-GPS screenless bands score low.. If that is what you are buying for, the Amazfit Helio Strap (2025) does not close the gap elsewhere.
Battery Life
The Amazfit Helio Strap (2025) leads clearly here, 8.5 against 6.0 — a 2.5-point margin on real endurance once continuous heart rate, SpO2 and the always-on display are enabled, not just the headline figure.. If that is what you are buying for, the Polar Loop (2025) does not close the gap elsewhere.
Display & Usability
The Polar Loop (2025) and Amazfit Helio Strap (2025) are level here, at 2.0/10 each. screen size, brightness and how much you can actually read on the wrist mid-workout. is not what separates these two — look to the categories where the scores diverge.
Health Features
The Polar Loop (2025) and Amazfit Helio Strap (2025) are level here, at 6.5/10 each. depth of the health sensor suite and how much of it is FDA-cleared and enabled in the US. is not what separates these two — look to the categories where the scores diverge.
App & Data Portability
The Polar Loop (2025) leads clearly here, 8.5 against 6.0 — a 2.5-point margin on quality of the companion app and whether you can get your own data out in a documented format.. If that is what you are buying for, the Amazfit Helio Strap (2025) does not close the gap elsewhere.
Value
The Amazfit Helio Strap (2025) leads clearly here, 9.0 against 6.5 — a 2.5-point margin on what the first year genuinely costs — purchase price plus any subscription needed for the advertised features.. If that is what you are buying for, the Polar Loop (2025) does not close the gap elsewhere.
Best For
Choose the Polar Loop (2025) if…
- • App & Data Portability matters most to you — the Polar Loop (2025) scores 8.5/10 here (quality of the companion app and whether you can get your own data out in a documented format.).
- • Tracking Accuracy matters most to you — the Polar Loop (2025) scores 8.0/10 here (how closely steps, heart rate and sleep match reference devices — and how badly the optical sensor falls apart at high intensity.).
- • Phone Independence matters most to you — the Polar Loop (2025) scores 2.5/10 here (how much the device can do with the phone left at home — a real GPS chip and on-wrist readouts score high, connected-GPS screenless bands score low.).
Choose the Amazfit Helio Strap (2025) if…
- • Battery Life matters most to you — the Amazfit Helio Strap (2025) scores 8.5/10 here (real endurance once continuous heart rate, SpO2 and the always-on display are enabled, not just the headline figure.).
- • Value matters most to you — the Amazfit Helio Strap (2025) scores 9.0/10 here (what the first year genuinely costs — purchase price plus any subscription needed for the advertised features.).
- • You want to spend less — it's $100 cheaper.
Pros & Cons
Polar Loop (2025)
Pros
- +Polar's sports-science pedigree — Nightly Recharge and SleepWise — with no subscription attached
- +Two band sizes in the box, so the fit problem is solved at purchase
- +Real data portability: TCX/GPX export, account export and a documented API
- +Two-year warranty, double the Fitbit and Amazfit norm
Cons
- −$199.99 for a screenless band with no GPS chip and no SpO2 — the $99.99 Amazfit Helio Strap does the same job
- −WR30 rather than 5 ATM, the weakest water rating in this comparison
- −8 days is the shortest battery life of any screenless band here
- −No ECG, no AFib detection, no FDA-cleared health feature
- −Polar Flow's interface is dated next to WHOOP's and Google Health's
Amazfit Helio Strap (2025)
Pros
- +$99.99 once versus $239/year — the same screenless recovery concept without the rental model
- +Beat its own 10-day rating in independent testing, hitting 12 days
- +Zepp pushes workouts to Strava, Google Fit and Apple Health without a paid tier
- +Comfortable enough to sleep in, which is where a screenless band earns its keep
Cons
- −Automatic workout detection is unreliable — reviewers found it missed yoga entirely and invented short bike rides
- −No GPS chip and no screen: without the phone you have no pace, distance or route
- −Recovery modelling is less mature than WHOOP's, and the Zepp app is busier and less polished
- −Amazfit does not publish a documented bulk data export or a water-resistance rating
- −Proprietary magnetic charging clip with no standard alternative
Shop by Need
FAQs
Is the Polar Loop (2025) or Amazfit Helio Strap (2025) better overall?+
Based on our 8-category scoring, the Amazfit Helio Strap (2025) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Battery Life, the Polar Loop (2025) or the Amazfit Helio Strap (2025)?+
The Amazfit Helio Strap (2025) scores higher on Battery Life (8.5/10 vs 6.0/10) — real endurance once continuous heart rate, SpO2 and the always-on display are enabled, not just the headline figure..
Which is better for App & Data Portability, the Polar Loop (2025) or the Amazfit Helio Strap (2025)?+
The Polar Loop (2025) scores higher on App & Data Portability (8.5/10 vs 6.0/10) — quality of the companion app and whether you can get your own data out in a documented format..
Which is better for Value, the Polar Loop (2025) or the Amazfit Helio Strap (2025)?+
The Amazfit Helio Strap (2025) scores higher on Value (9.0/10 vs 6.5/10) — what the first year genuinely costs — purchase price plus any subscription needed for the advertised features..
Which is better for Tracking Accuracy, the Polar Loop (2025) or the Amazfit Helio Strap (2025)?+
The Polar Loop (2025) scores higher on Tracking Accuracy (8.0/10 vs 7.0/10) — how closely steps, heart rate and sleep match reference devices — and how badly the optical sensor falls apart at high intensity..
Is the Polar Loop (2025) worth the price difference over the Amazfit Helio Strap (2025)?+
The Amazfit Helio Strap (2025) is the cheaper option at $99.99 versus $199.99. Whether the pricier model is "worth it" depends on how much you value its lead in Battery Life.
What's the warranty on the Polar Loop (2025) vs the Amazfit Helio Strap (2025)?+
The Polar Loop (2025) ships with a 24-month warranty; the Amazfit Helio Strap (2025) ships with a 12-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Cheaper Option
Garmin vívosmart 5 (2022) — $149.99
Premium Option
Polar Loop (2025) — $199.99
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.