Ignite 3
Polar Ignite 3 is a watch from 2022, sitting in the mid-range band at an indicative $399.
It reads 16 of the 33 signals this comparison tracks. Nothing at all from body composition. Rarer readings it does take: sleep efficiency.
By sensor class: 5 at high accuracy and 4 at consumer grade. That grade is my classification of the hardware, not a lab test. Those readings come from an optical heart rate sensor, a skin temperature sensor, a GPS receiver and an accelerometer.
Its 5 days per charge are the 70th longest of the 74 devices of its kind here that publish a figure. The AMOLED screen can stay always on. Multi-band GPS. Rated WR30 / 30m, fine for swimming. It weighs 35 g. Case size 43mm. No subscription is required.
Fitness/wellness; AMOLED, multiband GPS, nightly skin-temp (per Polar spec page); no SpO2/baro/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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