Apple Watch Series 6: Is It Still Worth Buying in 2025?

You spot a refurbished Apple Watch Series 6 online for under $120 and wonder if it’s actually worth the risk. The 2020 release still holds up well, but whether it’ll survive the next few years matters more than the upfront price. As of 2025, the Series 6 officially supports watchOS 11.5 (YouTube tech review), which shapes the whole value calculation.

Release Date: September 2020 · Display Sizes: 40mm, 44mm · Key Sensors: Blood oxygen, ECG, Accelerometer · Water Resistance: 50m · Current Availability: Refurbished primarily

Is the Apple Watch Series 6 still worth buying?

Pros and cons in 2025

For budget buyers, the Series 6 hits a price floor that newer models haven’t matched. A refurbished unit can be found for around $110, according to UpTrade refurbished marketplace, which makes it the cheapest entry point into the Apple Watch ecosystem. You get always-on display, ECG, blood oxygen sensing, and fall detection — features that still feel modern four years later.

The catch is software longevity. Apple typically supports Watch models for four to five years, which puts the Series 6 somewhere in the 2025–2026 end-of-support window. According to current tech reviews, the watch still runs watchOS 11.5 smoothly for most daily tasks, though minor lags appear compared to the Series 10.

Value vs new models

Comparing the Series 6 to newer models reveals where the trade-offs lie. The Series 7, released in 2021, offers a 20% larger screen thanks to 40% smaller bezels, according to MusicMagpie electronics reseller comparison. It also charges 33% faster and has a 50% thicker display crystal for durability. Yet the refurbished price gap is only about $20 — making the Series 7 the smarter buy for most people.

Series 8 adds crash detection and a temperature sensor, but refurbished units start around $170, per UpTrade pricing data. For under $120, the Series 6 remains the most affordable Apple Watch with health sensors — but the price-to-feature ratio favors the Series 7 at just $130 more.

How old is the Apple Watch Series 6?

Release date and lifecycle

Apple launched the Series 6 in September 2020 as a mid-cycle refresh that added blood oxygen monitoring to the existing Series 5 design. The S6 chip delivered roughly 20% faster performance, and Apple introduced the always-on display feature that year, according to Matt Popovich tech spec compilation. By 2025, that puts the device at five years old — aging, but still within Apple’s typical support window.

The Series 6 shares nearly identical sensors with the Series 7: blood oxygen, ECG, altimeter, and fall detection are all present, as documented by MusicMagpie spec comparison. The processor difference between S6 and S7 is minimal in real-world use, though the Series 7’s larger display and faster charging are tangible daily improvements.

End of life details

Apple hasn’t officially announced an end-of-support date for the Series 6. However, based on historical patterns, devices typically receive four to five years of watchOS updates. The Series 6 already runs watchOS 11.5 in 2025, which suggests it remains in active support. According to UpTrade refurbished market analysis, Series 7 software support extends until 2028+, making it the longer-term choice.

Can the Apple Watch Series 6 track periods and ovulation?

Cycle Tracking features

The Apple Watch Series 6 does not have dedicated hardware for cycle tracking — it relies on the Health app on your paired iPhone to log period data. According to Apple Support documentation, the Cycle Tracking feature works with any Apple Watch Series 6 or later, using data entered manually or synced from health apps. The watch itself doesn’t detect ovulation — it estimates it retrospectively based on temperature data from a compatible thermometer sensor, not the watch.

For users tracking cycles, the Apple Watch provides reminders and logging convenience, but the core sensing happens on the iPhone or connected accessories. The Series 6’s sensors (ECG, blood oxygen, heart rate) contribute health context but don’t directly measure hormonal changes or ovulation.

Ovulation insights

Apple’s Health app can estimate ovulation windows based on cervical mucus logs and basal body temperature, but this requires compatible third-party thermometers or manual entry. The watch’s role is limited to notification delivery and data display, not measurement. Series 6 owners get the same cycle tracking experience as Series 7, 8, or 9 — the hardware difference doesn’t affect this feature.

Can the Apple Watch help with asthma management?

Breathing monitoring

The Apple Watch Series 6 monitors background breathing disturbances through its accelerometers and mic, but this is not a diagnostic tool for asthma. Medical Economics industry publication reports that while Apple Watch can track respiratory rate and detect irregular breathing patterns, it cannot diagnose asthma or replace clinical assessment. The data serves as an awareness tool, not a medical device for asthma management.

For users with existing asthma, the watch can log episodes when manually triggered and integrate with health apps for pattern review. However, it doesn’t measure lung function, air quality, or trigger exposure — key factors for asthma control.

Health app integration

Apple’s Health app aggregates breathing data from the watch, allowing users to review trends over time. This historical view can help identify correlations between activity levels and breathing irregularities, useful for discussing patterns with a physician. The Series 6 provides the same breathing metrics as newer models — respiratory rate during sleep and workouts, plus high heart rate notifications that may accompany asthma episodes.

Apple Watch Series 6 price and comparisons

Current pricing

Refurbished Apple Watch Series 6 units sell for approximately $110 as of 2025, according to UpTrade refurbished marketplace pricing. New units are no longer available from Apple or major retailers — the only path to a Series 6 is through certified refurbished sellers, auction platforms, or secondary markets. Prices vary by condition (excellent vs good), cellular capability, and included accessories.

For context, the Series 7 refurbished starts at $130+, representing a 60% discount from the original $399 retail price. The Series 8 refurbished begins around $170+. This price ladder means the Series 6 is the cheapest option, but the small premium for Series 7 or Series 8 buys substantially more support longevity.

Vs Series 7 and 8

Three models, three distinct value propositions:

What this means: The data shows that Series 7 delivers the most value per dollar spent, combining near-identical health sensors with meaningfully longer software support.

According to MusicMagpie tech comparison, the Series 7’s 20% screen increase and 33% faster charging are practical daily improvements that justify the ~$20 price premium over Series 6. The Series 8 adds crash detection — a meaningful safety feature — but at roughly $60 more than Series 7, it targets buyers who prioritize safety features over budget optimization.

For someone deciding today, the Series 7 represents the sweet spot: nearly identical sensors to the Series 8, larger display than Series 6, and longer expected support than both, per UpTrade’s 2025 market analysis. The Series 6 remains viable for basic fitness and notification needs at the lowest price, but the value calculus favors spending slightly more for the Series 7.

The pattern: Series 6 remains the budget champion for health features, but its age shows in the support timeline and hardware refinements missing from newer models.

The implication: Expert consensus points toward Series 7 as the smarter long-term buy, though Series 6 defenders note its continued performance in 2025.

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While weighing Series 6 against successors like Series 7 and 8, the Series 8 specs and sizes reveal refinements in health sensors and UK availability that might sway your decision.

Frequently asked questions