Amazfit Helio Ring
Amazfit Helio Ring is a ring from 2024, sitting in the mid-range band at an indicative $149.
It reads 13 of the 33 signals this comparison tracks. Nothing at all from body composition.
By sensor class: 9 at consumer grade. That grade is my classification of the hardware, not a lab test. Those readings come from an optical heart rate sensor, an optical blood oxygen sensor, a skin temperature sensor and an accelerometer. Blood oxygen is measured through the night, not continuously through the day.
Its 4 days per charge are the 7th longest of the 7 devices of its kind here that publish a figure. Rated 10ATM, fine for swimming. It weighs 3.75 g. Ring sizes 8/10/12. No subscription is required.
Titanium smart ring; HR/HRV/SpO2/temp/EDA-stress, sleep + readiness; no GPS/ECG.
Key specs
What it tracks
Heart & vitals
Sleep
Activity
Fitness
Buying for battery life? See every device ranked by battery life
Turn a supported wearable into daily health scores
MyBodyAI reads Fitbit, Oura, Polar and Withings by logging in, and Garmin from a data export, then builds daily recovery, sleep, load and immune scores, a biological age estimate, and early warnings. Optional, and separate from this comparison.
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