Purchase & Hardware
| Kriterium | ONA ona
|  Helio Strap
|  WHOOP One
|  Garmin CIRQA
|  Fitbit Air
| Fitbit Air |
|---|---|---|---|---|---|---|
| Price | 99.99 € | 99.90 € | 199.00 € per year | 199.99 € | 99.99 € | |
| Costs over 3 years | 99.99 € | 99.90 € | 597.00 € | 199.99 € | 99.99 € | |
| Mandatory subscription | No | No | Yes | Connect+ optional | Premium optional | |
| Battery Life | 12–14 days | 10 days | 14+ days | 10 days | 7 days | |
| Water resistance | 3 ATM | 5 ATM | IP68 | 5 ATM | 5 ATM | |
| Display | Screenless | Screenless | Screenless | Screenless | Screenless | |
| Naps | 6.0 | 5.2 | not released | not released | 5.0 | |
| Sensorics | PPG + SpO₂ + 6-Axis | PPG + SpO₂ + Temperature | PPG + SpO₂ + Temperature | Elevate + Pulse Ox + Temperature, Acceleration | PPG + SpO₂ + Temperature, 6-Axis | |
| Module Dimensions | 41.2 × 27 × 10.6 mm | 34 × 24.3 × 10.6 mm | not released | 47 × 27 × 9 mm | 34.9 × 17 × 8.3 mm | |
| Load | magnetic · ≤ 2 h | Magnet Dock · approx. 1.5 h | Cable | magnetic | magnetic, 1 day in 5 min. | |
| Data buffer in the device | up to 7 days | up to 21 days HF | 512 MB | 128 MB | up to 7 days of detailed data | |
| availability | ✓ Watchdog | not released | not released | not released | not released | |
Health & daily condition
| Kriterium | ONAona
| Helio Strap
| WHOOP One
| Garmin CIRQA
| Fitbit Air
| Fitbit Air |
|---|---|---|---|---|---|---|
| Heart rate & HRV | ✓ (24/7) | ✓ (24/7) | ✓ (24/7) | ✓ (24/7) | ✓ (24/7) | |
| SpO₂ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Stress Tracking | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Daily Energy / Recovery | Body Energy | BioCharge | Recovery | Body Battery | Readiness (partly Premium) | |
| Instant Measurement Directly on the Band | HF, SpO₂, Stress (per Touch) | – | – | – | – | |
| Body / Fitness Age | Body Age | – | – | Fitness Age | – | |
| Skin Temperature | – | ✓ | Plan-dependent | ✓ | ✓ | |
| EKG / Blood Pressure Insights | – | – | – | – | AFib notifications |
Sleep & Night
| Kriterium | ONAona
| Helio Strap
| WHOOP One
| Garmin CIRQA
| Fitbit Air
| Fitbit Air |
|---|---|---|---|---|---|---|
| Sleep Phases | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Sleep Score | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Nap | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Breathing during sleep | Breath quality + Breathing frequency | Breath quality | Breathing frequency | Breathing frequency | Breathing frequency |
Activity & Operation
| Kriterium | ONAona
| Helio Strap
| WHOOP One
| Garmin CIRQA
| Fitbit Air
| Fitbit Air |
|---|---|---|---|---|---|---|
| Sport modes | 152 | 57 | 140+ | 80+ | automatic + manual | |
| Automatic training detection | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Find-my-Band in the app | ✓ | ✓ | – | ✓ | – |
App, data & ecosystem
| Kriterium | ONAona
| Helio Strap
| WHOOP One
| Garmin CIRQA
| Fitbit Air
| Fitbit Air |
|---|---|---|---|---|---|---|
| Apple Health | Integration (incl. sleep phases) | Integration (sleep phases not recorded) | Integration (sleep phases not recorded) | via Garmin Connect – sleep phases not recorded | iOS compatible – Google Health in focus | |
| Health Connect | Integration (incl. sleep phases) | ✓ | ✓ | ✓ | native | |
| Data export | CSV | Zepp Export | CSV | FIT / GPX / CSV | Google data export | |
| Data Hosting | Germany (GDPR · no Ad-SDKs) | Zepp Cloud | WHOOP Cloud | Garmin Cloud | Google Cloud | |
| Paywall for Core Features | None | None | Membership required | Connect+ optional | partially premium | |
SUMMARY
Where ona wins in comparison.
Six clear arguments for sales talks and assortment decisions.
One-time purchase instead of membership
99.99 € including core features – no mandatory subscription or paywall for the most important features.
Longer through everyday life
12–14 days runtime: more than Helio, Garmin, Polar, and Fitbit Air.
Instant Measurement Directly on the Band
Heart rate, SpO₂, and stress on demand via touch – a clear unique selling point in the field.
Apple Health with Sleep Phases
The complete night context is confirmed in writing for ona and strengthens the supplement for the Apple Watch.
Bluetooth 6.0 as a technical signal
The latest published Bluetooth generation in the direct competitive field.
Data in Germany
GDPR-compliant hosting, CSV export, and no advertising SDKs.
As of 03.09.2026. ona information according to the current product briefing and written confirmation of V1 app scope. Competitive data has been cross-referenced with publicly available manufacturer information from Amazfit, WHOOP, Garmin, Polar, and Google; non-publicly documented details are marked accordingly.