Apple Watch Ultra 4 vs Garmin Fenix 9 Pro: Both watches nailed my accuracy test

A recent head-to-head performance test compared the heart rate accuracy of the Apple Watch Ultra 4 and the Garmin Fenix 9 Pro. By utilizing a chest-mounted Frontier X2 electrical heart rate monitor as a benchmark, the reviewer conducted a 30-minute run over challenging hilly terrain. The results demonstrated impressive consistency across both devices, with the Garmin Fenix 9 Pro recording an average of 159 bpm and the Apple Watch Ultra 4 recording 160 bpm, both closely aligning with the benchmark's 158 bpm. While both devices proved highly accurate for fitness tracking, the reviewer noted distinct differences in their utility: the Apple Watch excels in software integration and daily smartwatch functionality, whereas the Garmin Fenix 9 Pro is superior for long-duration adventures due to its significantly longer battery life and specialized survival tools. Both devices remain top-tier recommendations for users prioritizing precise health and fitness data.