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Garmin Fenix 9 Pro sleep tracking falls short as reviews flag less reliable data than Fitbit and Whoop; premium pricing starts at S$1,389

Garmin's new Fenix 9 Pro smartwatch, priced from S$1,389, faces criticism for its sleep tracking capabilities, which are deemed less reliable than competitors like Fitbit and Whoop. Reviews indicate it often overestimates deep sleep and struggles with REM detection, raising concerns among potential buyers.

Geeky Gadgets Geeky Gadgets+1 source3 November 2026 · 13:52 UTC
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Garmin's Fenix 9 Pro, launched with premium pricing starting at S$1,389, has received mixed reviews, particularly regarding its sleep tracking features. Critics note that the device's sleep stage tracking is less reliable than that of competitors like Fitbit and Whoop.12345678

The Fenix 9 Pro often overestimates deep sleep and struggles to accurately detect REM sleep, leading to concerns about its effectiveness for users seeking precise sleep data. As one review pointed out, Garmin's sleep tracking capabilities fall short compared to brands like Fitbit, Apple, and Whoop, which are known for their more accurate sleep metrics.

Despite these shortcomings, the Fenix 9 Pro boasts several enhancements, including a new AMOLED screen that is brighter than its predecessor and improved stamina-tracking features. The watch can track Stamina Zones and Stamina Curves, providing users with insights into their endurance over time.

The Fenix 9 series also offers increased storage, with both models featuring 64GB of storage and improved mapping capabilities. The 51mm model can last up to 31 days on a single charge, making it a strong contender for outdoor enthusiasts despite its sleep tracking flaws.9

Overall, while the Fenix 9 Pro presents several appealing features, its sleep tracking issues may deter potential buyers looking for comprehensive health monitoring.

Key Insight
“The fenix 9 Pro's sleep stage tracking often overestimates deep sleep and struggles with REM detection, a shortcoming competitors handle more precisely. The watch also introduces Garmin Epic, which compiles activities into shareable stories, and doubles storage to 64GB across all models.”
CuriousCats studied:
1
Geeky GadgetsGeeky Gadgets
“However, its sleep stage tracking is less reliable, often overestimating deep sleep and struggling to accurately detect REM sleep.”
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2
HardwareZone SingaporeHardwareZone Singapore
“Garmin has announced updates to their fenix line of premium multisport smartwatches with the fenix 9 and fenix 9 Pro. These are new additions to a smartwatch lineup that last saw a release in 2024, and add a suite of new social and exercise tracking features, as well as a couple of hardware improvements.”
HardwareZone Singapore →
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