Amazfit vs Garmin: How Much Watch Do You Actually Need?

Amazfit and Garmin now sell watches that, read from the spec sheet alone, look nearly identical. Both offer GPS, blood-oxygen sensors, multi-day battery life, AMOLED screens, and training-load metrics with their own branded names. The Amazfit Balance costs around £160. A comparably specced Garmin Venu 3 costs closer to £350. That price gap has to be justified by something more than a logo, and it mostly is — just not evenly, and not in the places the marketing emphasises.

The promise both brands are selling

Both companies are selling the same underlying idea: a watch that replaces a chest-strap heart-rate monitor, a dedicated running watch, a sleep tracker and a notification hub, all in one wrist-worn device that costs a fraction of buying each separately. Garmin got there first and built its reputation on outdoor and endurance-sport credibility — Forerunner and Fenix watches were the standard GPS running and hiking tool for over a decade before smartwatch features arrived on top. Amazfit, part of Zepp Health, took the opposite route: consumer smartwatch first, endurance features added later, at a price that undercuts Garmin by half or more at almost every tier.

Where Amazfit has genuinely closed the gap

The sensor hardware argument that used to separate these brands has mostly collapsed. Amazfit’s newer watches use the same class of PPG heart-rate array and, in the Balance and Active lines, dual-band GPS — the same accuracy-improving technology Garmin uses in its mid-range Forerunners. Screen quality, once a clear Garmin weakness on cheaper models, now favours Amazfit in several head-to-head comparisons, since Zepp OS watches ship with AMOLED panels as standard at price points where Garmin still sells transflective MIP displays.

Battery life claims are broadly comparable on paper — both brands rate their mid-range watches at one to two weeks in smartwatch mode — and Amazfit’s app, Zepp, has become a genuinely competent piece of software: clean sleep-stage graphs, a training-readiness score modelled closely on Garmin’s own Body Battery concept, and reliable phone notification mirroring. For someone comparing two spec sheets side by side with no brand loyalty, the Amazfit case is legitimately strong.

Where Garmin still earns the premium

The gap reappears the moment a watch is actually used for structured training rather than casual step-counting. Garmin’s Connect IQ platform has over a decade of accumulated third-party workout apps, structured-training-plan integrations, and data-field customisation that Zepp’s app ecosystem has not matched — a software moat built from years of accumulated developer time. Garmin’s mapping and routing, present from the Forerunner 265 upward and standard on the Fenix and Epix lines, use full-colour topographic maps with turn-by-turn routing on trail; Amazfit’s equivalent feature is a simpler breadcrumb track without the same navigational depth.

Multi-band GPS accuracy, while present on both brands’ higher-end watches, has a longer track record on Garmin: independent GPS-accuracy comparisons run by dedicated sports-watch reviewers over several watch generations have consistently found Garmin’s dual-frequency implementation slightly more stable in genuinely difficult conditions — dense tree canopy, urban canyon routes, tunnel sections — than Amazfit’s newer implementation of the same underlying chipset technology. The difference is modest, measured in metres per kilometre, though real and repeatable.

Battery honesty is the other quiet Garmin advantage. Garmin’s stated battery figures for GPS-on activity tracking have historically tracked closer to real-world results than Amazfit’s more optimistic marketing numbers, according to comparisons run across multiple watch cycles by long-running GPS-watch review outlets. A Garmin watch rated for twenty hours of GPS tracking tends to land close to that in practice; an Amazfit watch rated similarly has more often needed a caveat in independent testing.

Materials and build: rugged vs refined

Pop the two philosophies open and the difference in engineering priority is visible immediately. Garmin’s outdoor-focused lines — Instinct, Fenix, tactix — use fibre-reinforced polymer cases, sapphire or Power Sapphire lens options on higher trims, and a bezel design engineered specifically to survive an impact against rock or a doorframe, tested to US military MIL-STD-810 standards for shock and temperature. Amazfit’s flagship Balance and Active watches prioritise a slimmer, lighter aluminium-and-glass build closer to a conventional smartwatch aesthetic; genuinely nice to wear daily, but not built with the same abuse tolerance as Garmin’s rugged tier, and Amazfit does not publish MIL-STD certification on most of its consumer-facing lines the way Garmin does across its outdoor range.

Strap ecosystems tell a similar story. Garmin has stuck to a proprietary quick-release pin across most of its range for years, but because the design has been consistent across so many watch generations, third-party strap availability is enormous. Amazfit’s strap attachment has varied more across generations, meaning strap compatibility is a real thing to check model-by-model rather than assumed.

Recovery and readiness scores: same idea, different rigour

Both brands now sell a proprietary “how ready are you to train today” number — Garmin calls it Body Battery, Amazfit calls it Readiness — built from overnight heart-rate variability, resting heart rate, sleep quality and recent training load. The underlying inputs are near-identical; the difference is how long each algorithm has been in the field being quietly corrected. Garmin’s Body Battery has been refined across roughly six years of watch generations and a large existing user base feeding back edge cases — shift workers, illness spikes, altitude training — that Amazfit’s newer Readiness score has not had the same volume of real-world correction against. Neither score is a medical measurement, and this piece is not claiming either company has published clinical validation data to that standard; treat both as a directionally useful daily nudge rather than a precise number, with a mild edge to Garmin’s simply for having more iterations behind it.

Stress tracking follows the same pattern. Both derive a stress score from heart-rate variability sampled through the day, and both are prone to the same false positive: a hard workout raises heart-rate variability disruption in a way that can read as “stress” to the algorithm despite feeling like accomplishment to the wearer. It is a known limitation of HRV-based stress scoring industry-wide, not something unique to either brand, and worth knowing before trusting a “high stress” alert that arrived twenty minutes after a good run.

The app ecosystem gap, concretely

The Connect IQ versus Zepp gap is easiest to see in three specific places. First, third-party watch faces and data fields: Garmin’s marketplace has thousands of community-built options refined over a decade, while Zepp’s equivalent store is smaller and newer. Structured workout import is the second: platforms like TrainingPeaks and popular running-coach apps built native Garmin integrations years before adding Amazfit support, and some still don’t support it at all, meaning a runner following a coach-built plan may simply be unable to load it onto an Amazfit watch. Multi-sport data depth is the third: Garmin’s running dynamics (ground contact time, vertical oscillation, stride length) works with no extra accessory on newer Forerunners, while Amazfit’s equivalent metrics are shallower and, on some models, require a compatible chest strap Garmin doesn’t need for the same data.

None of this makes Zepp OS bad — for sleep tracking, notifications, and casual activity logging it is a clean, modern piece of software that most owners will find entirely sufficient. It specifically falls short for anyone whose goal is structured, coached, multi-year training progression, which is a narrower audience than the marketing on either watch’s box suggests.

The case against buying either right now

There is a real argument for skipping both and buying nothing: if the actual use case is casual step-and-sleep tracking with the occasional notification glance, a £40 Xiaomi or Amazfit Bip-tier band delivers most of the daily value either flagship offers, and the money saved is better spent elsewhere. The Amazfit-versus-Garmin decision only matters once GPS accuracy, structured training or outdoor navigation are genuinely part of the use case — for everyone else, this comparison is solving a problem the cheaper tier already covers, a point the best cheap fitness band for step-and-sleep basics makes in more detail.

Comparing the actual price tiers

Lined up tier by tier, the value case shifts depending on where you look. At the entry level, the Amazfit Bip 5 (around £60) has no direct Garmin equivalent — Garmin’s cheapest current smartwatch, the Instinct 2, sells for closer to £180, and there simply isn’t a Garmin product competing at Bip pricing. In the middle, the Amazfit Balance (around £160) sits against the Garmin Venu 3 (around £350) and the Forerunner 165 (around £220) — the closer real comparison, since the 165 shares the Balance’s AMOLED screen and general fitness focus rather than the Venu’s more lifestyle-leaning positioning. At the top, Amazfit’s Falcon and T-Rex Ultra lines (£200–300) compete against Garmin’s Fenix and Epix ranges (£500–900), and here the gap becomes hardest to justify on spec alone — Garmin’s premium at this tier is buying satellite communicator integration, multi-band GPS refined across more hardware generations, and sapphire-grade case options that Amazfit’s equivalent tier does not yet match feature for feature.

The pattern across all three tiers is consistent: Amazfit wins outright at price points Garmin doesn’t compete in, and narrows the gap considerably in the middle, but Garmin’s premium becomes more defensible rather than less as the price climbs, because the extras at the top — mapping depth, satellite messaging, multi-year Connect IQ ecosystem lock-in — are exactly the features serious outdoor and endurance users are willing to pay for and casual buyers never touch.

The verdict

Wait — and choose based on what you’ll actually train for, not the badge. Neither brand is the wrong buy; they are answering different questions. If the watch’s job is running or hiking with real route navigation, structured training plans, and a battery that matches its box claim under GPS load, Garmin’s mid-range — the Forerunner 165 or 265 — is worth its premium over Amazfit, and that premium is earned in the software ecosystem and GPS reliability rather than the sensor silicon itself.

If the watch’s job is daily health tracking, sleep, notifications and casual runs logged without needing a coach-grade training plan, the Amazfit Balance delivers most of the Garmin experience at under half the price, and the gap in day-to-day usefulness for that use case is narrow enough that the saved £150–200 is the better spend. Buy Garmin for the training plan and the map. Buy Amazfit for everything else and put the difference towards a proper running watch later if the habit sticks — a path the best running watch under £200 covers directly for exactly that upgrade decision.

For anyone deciding whether either brand’s sensor claims are worth trusting in the first place, blood-oxygen and stress metrics: which wearable numbers mean anything is the honest read on what these watches can and cannot actually measure.