Samsung Galaxy Watch 7 vs Apple Watch Series 10: fitness accuracy compared

Wearable fitness technology has become essential gear for runners, cyclists and gym regulars across Australia. From early-morning joggers weaving through Sydney's Centennial Park to bushwalkers tackling trails in the Blue Mountains, a smartwatch is often the most important piece of equipment outside of shoes. Two of the biggest contenders in 2025 are the Samsung Galaxy Watch 7 and the Apple Watch Series 10, both promising laboratory-grade biometrics on the wrist.

The pitch from each brand sounds impressive on paper. Samsung leans on its BioActive sensor, while Apple highlights a redesigned optical heart rate module and improved motion processing. Real-world performance often diverges from marketing claims, which is why an apples-to-apples comparison matters for anyone spending between $649 and $999 AUD on a daily training companion.

For this test, both watches were worn on the same wrist during a week of mixed training in and around Sydney and Melbourne. Activities ranged from a 10K along the Yarra River to an ocean swim at Icebergs in Bondi, a stair session on the Sydney Harbour Bridge steps, and a strength workout at a local F45 studio in Surry Hills. A Polar H10 chest strap and a Garmin Forerunner 965 served as the control devices for heart rate and GPS accuracy.

Heart rate monitoring under real effort

Chest straps remain the gold standard in exercise physiology, and any wrist-worn sensor is judged against that benchmark. During threshold intervals on the Bondi to Bronte coastal path, the Galaxy Watch 7 tracked heart rate within an average of 2.8 beats per minute of the Polar H10. The Apple Watch Series 10 held a tighter margin of about 1.9 beats per minute, particularly during steady efforts between 140 and 170 bpm.

During high-intensity F45 sessions, where heart rate spikes and recoveries happen in the space of seconds, the Apple Watch continued to track transitions smoothly. The Galaxy Watch 7 lagged slightly during the initial spike of each set but recovered quickly once the effort stabilised. For most recreational athletes training in Australian conditions, both perform within acceptable ranges, although cyclists chasing precise zone data may favour the Apple.

GPS tracking on Australian terrain

GPS accuracy is where outdoor enthusiasts pay the closest attention, especially given the country's wide range of environments. In open skies along the Yarra Trail in Melbourne, both watches delivered clean, consistent tracks with sub-metre deviation. In the more challenging urban canyons of the Sydney CBD, signal bounce was noticeable on both devices, but the Apple Watch Series 10 held a marginally more accurate line against the known route.

The Galaxy Watch 7 introduced dual-frequency GPS satellite connectivity with this generation, which helps in dense tree cover. Tested on a bushwalk in the Dandenong Ranges, the Samsung maintained a more reliable trail under canopy than its predecessor. The Apple Watch, while not as strong in dense foliage, still finished within 1.2 percent of the actual distance on most training runs.

Sleep and recovery metrics

Sleep tracking has become a quiet battleground between the brands. Over a typical work week that included late-night coverage at a Melbourne Cup event and early starts for parkrun Australia in Parramatta, both watches logged similar total sleep durations, usually within 8 to 12 minutes of each other. The differences appeared in sleep staging.

The Apple Watch Series 10 tended to log slightly more deep sleep on nights following harder training, while the Galaxy Watch 7 often reported higher REM totals. Neither was clearly superior, but the Apple data correlated more closely with subjective feelings of recovery. Morning readiness scores from both apps also reflected the tougher days on the legs.

Sport profiles and workout detection

Auto-detect features can be hit and miss. On a cycling session along the Brisbane River path, both watches recognised the activity within the first two minutes, although the Apple Watch was fractionally faster to engage the appropriate profile. During open-water swims at Icebergs, stroke detection on the Apple Watch Series 10 was noticeably more accurate, correctly identifying freestyle laps in choppy conditions.

Strength training detection remains a weakness for both, with rep counts often undercounting during fast circuit work. The Galaxy Watch 7 offered slightly better automatic rep detection for bodyweight exercises, while the Apple Watch required manual selection more often but provided more granular heart rate data during rest periods.

Which watch wins for Australian fitness users

Neither device is a clear-cut winner across every discipline. For runners prioritising raw heart rate accuracy and open-water swimmers seeking reliable stroke data, the Apple Watch Series 10 holds a slim edge. For bushwalkers, hikers and those wanting flexible compatibility beyond one ecosystem, the Galaxy Watch 7 is a strong alternative.

Pricing in Australia places the Apple Watch Series 10 at a premium of roughly $50 to $100 AUD above the Galaxy Watch 7, depending on case size and connectivity. That price gap narrows when trade-in offers and telco bundles through retailers like JB Hi-Fi or Telstra are considered. Choosing the right wearable comes down to which phone sits in the pocket and which activity matters most on the training calendar.