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The right replacement depends on a trade-off the SE 3 makes obvious: Apple gives you the strongest iPhone integration, while competing watches generally offer longer battery life. GPS quality, training depth, health tools, case comfort, phone compatibility and price then determine which compromise is easiest to live with.
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The short answer: which SE 3 alternative should you buy?
Apple Watch SE 3 alternatives fall into five practical categories. The recommendations below use the product details and independent assessments available from Apple, TechRadar and Tom’s Guide in 2025 and 2026.
| Best for | Model | Why it fits | Main compromise |
|---|---|---|---|
| iPhone integration | Apple Watch SE 3 | Native iPhone-only compatibility, Apple notifications and the most cohesive Apple experience | Shorter battery endurance than the Garmin and Amazfit options |
| All-around fitness | Garmin vívoactive 6 | AMOLED display, heart-rate tracking, activity tracking, built-in GPS, 5ATM water resistance and compatibility with Android and iOS | TechRadar reports that heart-rate tracking and GPS precision are weaker than those of some Garmin models |
| Running and training plans | Garmin Forerunner 165 | Run-focused training tools, GPS and approximately week-long battery life | Less centered on Apple-style smartwatch integration |
| Battery and price value | Amazfit Active 3 Premium | The cited US comparison lists a lower price and up to 12 days of battery life | Smaller display and slower charging than the SE 3 in that comparison |
| Basic activity tracking | Samsung Galaxy Fit 3 | Low listed price and 13-day battery for steps and everyday movement | No built-in GPS; location tracking depends on a phone |
If you already use an iPhone and want to reply to notifications, use Apple services and avoid compatibility surprises, the SE 3 remains the least complicated choice. If charging every day is the reason you are looking elsewhere, start with Garmin or Amazfit rather than moving to another short-lived smartwatch.
#1 Best Overall
- Designed with a bright AMOLED display, get a more complete picture of your health, thanks to battery life of up to 11 days in smartwatch mode
- Body Battery energy monitoring helps you understand when you’re charged up or need to rest, with even more personalized insights based on sleep, naps, stress levels, workouts and more (data presented is intended to be a close estimation of metrics tracked)
- Get a sleep score and personalized sleep coaching for how much sleep you need — and get tips on how to improve it; key metrics such as HRV status help you better understand your health (data presented is intended to be a close estimation of metrics tracked)
- The smart wake alarm gently vibrates to wake you at the right optimal time
- Find new ways to keep your body moving with more than 80 built-in indoor and GPS sports apps, including walking, running, cycling, HIIT, mobility, swimming, golf and more
What the Apple Watch SE 3 provides as the baseline
Apple lists the Apple Watch SE 3 at a starting price of $249 for GPS and $299 for GPS + Cellular on its current comparison page. Those are listed starting prices; regional taxes, bands, promotions and carrier requirements can change the amount you actually pay.
Apple’s battery figures come from July–August 2025 testing of preproduction devices. The standard test is rated at 18 hours, while Low Power Mode is rated at 32 hours including sleep tracking. Apple warns that actual endurance varies with use, configuration, cellular network, signal strength and other factors.
The SE 3 is designed for iPhone owners. TechRadar describes it as its recommended fitness tracker for iPhone users, citing GPS, 5ATM water resistance, iOS-only compatibility and an 18-hour battery rating. That combination makes the SE 3 more than a step counter: it is a compact smartwatch whose fitness features are closely tied to Apple’s phone, notification and health ecosystem.
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The figures below are the specific values reported by the cited pages. “Not stated” means the referenced material did not establish a comparable figure; it is not a claim that the feature is absent.
| Device | Platform compatibility | GPS | Battery claim | Price figure in cited coverage | Display or case detail | Charging detail |
|---|---|---|---|---|---|---|
| Apple Watch SE 3 | iOS only | Yes | 18 hours standard; 32 hours in Low Power Mode with sleep tracking | $249 GPS; $299 GPS + Cellular (Apple current listing) | 1.57-inch or 1.78-inch comparison sizes in Tom’s Guide coverage | Under one hour in the Tom’s Guide comparison |
| Garmin vívoactive 6 | Android and iOS | Built-in | Up to 11 days | Not stated in the cited material | AMOLED; exact size not stated | Not stated |
| Garmin Forerunner 165 | Not stated in the cited material | Yes | Approximately a week, according to Tom’s Guide | Not stated | Not stated | Not stated |
| Amazfit Active 3 Premium | Not stated in the cited material | Not stated in the cited material | Up to 12 days | $169 in Tom’s Guide’s cited US comparison | 1.32-inch | Under two hours in that comparison |
| Samsung Galaxy Fit 3 | Not stated in the cited material | No built-in GPS | Up to 13 days | $59 in TechRadar’s table | Not stated | Not stated |
Battery claims are maximum or test figures, not guarantees for every configuration. GPS recording, always-on displays, cellular use, frequent notifications and sleep tracking can all change real-world endurance. The cited prices and availability can also change by country, retailer and date.
Best for iPhone integration: Apple Watch SE 3
Why it remains the safest iPhone choice
The SE 3 is the only option in this group explicitly identified as iOS-only and positioned as Apple’s own watch for iPhone users. Pairing, notifications, Apple services and the watch’s everyday controls are designed around the iPhone rather than adapted to it.
That matters if your priority is a watch that behaves like an extension of the phone: calls and alerts appear in the same ecosystem, and you do not have to decide which features are lost when moving between Android and iOS. TechRadar calls the Apple Watch the “gold standard” for iPhone users while noting that Garmin and Fitbit watches can also work well with iOS.
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Rank #2
- Designed with a bright AMOLED display, get a more complete picture of your health, thanks to battery life of up to 11 days in smartwatch mode
- Body Battery energy monitoring helps you understand when you’re charged up or need to rest, with even more personalized insights based on sleep, naps, stress levels, workouts and more (data presented is intended to be a close estimation of metrics tracked)
- Get a sleep score and personalized sleep coaching for how much sleep you need — and get tips on how to improve it; key metrics such as HRV status help you better understand your health (data presented is intended to be a close estimation of metrics tracked)
- The smart wake alarm gently vibrates to wake you at the right optimal time
- Find new ways to keep your body moving with more than 80 built-in indoor and GPS sports apps, including walking, running, cycling, HIIT, mobility, swimming, golf and more
Who should accept the shorter battery
- iPhone owners who value integration more than multi-day endurance.
- People who want GPS and water resistance in a mainstream smartwatch rather than a specialist training watch.
- Users who prefer Apple’s interface and do not want to research phone-specific feature limitations.
The GPS model is the simpler value choice if your phone is normally nearby. The GPS + Cellular model costs more and may require a compatible carrier plan; the carrier and regional conditions should be checked before purchase.
Best all-around fitness alternative: Garmin vívoactive 6
What it changes compared with the SE 3
TechRadar lists the vívoactive 6 with an AMOLED display, heart-rate tracking, 5ATM water resistance, activity tracking, built-in GPS and compatibility with both Android and iOS. Its headline advantage is endurance: up to 11 days, far beyond a typical daily charging cycle.
That longer interval changes how you use the watch. You can leave it on through multiple nights of sleep tracking and several workouts without planning a charger around every day. It is also a practical choice for households where people use different phone platforms.
The accuracy qualification
Long battery life does not automatically mean the best sensor performance. TechRadar specifically notes that the vívoactive 6’s heart-rate tracking and GPS precision are weaker than those of some other Garmin models. For casual activity, walking and general exercise, that may be acceptable. Runners who care about the cleanest route data or highly consistent heart-rate readings should consider the Forerunner 165 instead.
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Choose it when
- You want one watch that can work with either Android or iOS.
- Multi-day battery is more important than Apple-specific integration.
- You want a full watch with built-in GPS rather than a phone-assisted band.
- You need general activity, heart-rate and sleep tracking without choosing a dedicated running model.
Best for runners: Garmin Forerunner 165
Tom’s Guide recommends the Forerunner 165 as an SE 3 substitute because of its training tools, GPS and roughly week-long battery life. That makes it the focused option for someone whose main question is not “Which watch mirrors my phone?” but “Which watch helps me train and record runs consistently?”
Why runners may prefer it
A run-oriented watch puts workouts and GPS recording closer to the center of the experience. The approximately week-long endurance also reduces the risk of starting a run with a nearly empty battery after forgetting a nightly charge.
The trade-off is ecosystem emphasis. The cited material does not establish the Forerunner 165’s full notification, payment or iPhone feature set, so buyers should confirm the exact phone functions they need before switching from an Apple Watch. The evidence supports its training and GPS strengths; it does not justify assuming feature-for-feature parity with the SE 3 as a general smartwatch.
Rank #3
- Designed with a bright AMOLED display, get a more complete picture of your health, thanks to battery life of up to 11 days in smartwatch mode. Fits wrists with a circumference of 125-190 mm
- Body Battery energy monitoring helps you understand when you’re charged up or need to rest, with even more personalized insights based on sleep, naps, stress levels, workouts and more (data presented is intended to be a close estimation of metrics tracked)
- Get a sleep score and personalized sleep coaching for how much sleep you need — and get tips on how to improve it; key metrics such as HRV status help you better understand your health (data presented is intended to be a close estimation of metrics tracked)
- The smart wake alarm gently vibrates to wake you at the right optimal time
- Find new ways to keep your body moving with more than 80 built-in indoor and GPS sports apps, including walking, running, cycling, HIIT, mobility, swimming, golf and more
Choose it when
- Running plans, workout structure and GPS records are your primary reasons to wear a watch.
- You want approximately a week of endurance rather than a daily charging routine.
- You can accept a more training-centered experience in exchange for that endurance.
Best budget and battery value: Amazfit Active 3 Premium
Tom’s Guide’s direct US comparison lists the Amazfit Active 3 Premium at $169 versus $249 for the Apple Watch SE 3. It also lists up to 12 days of battery life versus 18 hours, a 1.32-inch display versus the SE 3’s 1.57-inch or 1.78-inch comparison sizes, and charging in under two hours versus under one hour.
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What to verify before buying
The cited comparison does not establish the Active 3 Premium’s platform compatibility, GPS specification, payment support or notification behavior. Do not assume that a lower price and longer battery provide the same iPhone integration as the SE 3. Check the current regional product listing for the phone features and services you consider essential.
Best low-cost basic band: Samsung Galaxy Fit 3
TechRadar’s table lists the Galaxy Fit 3 at $59 with up to 13 days of battery life and no GPS. That combination suits someone who primarily wants steps, everyday movement and simple activity information at the lowest listed cost among these choices.
The phone-assisted GPS limitation
Without built-in GPS, the band cannot independently record a route in the way the SE 3, vívoactive 6 or Forerunner 165 can. Outdoor distance and location features therefore depend on a paired phone when the relevant function supports phone assistance. If you run or cycle without carrying a phone, this is the wrong category of device.
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Choose it when
- Your priority is inexpensive, low-maintenance activity tracking.
- You are comfortable carrying a phone for outdoor location records.
- You do not need the richer smartwatch and training features associated with the other models.
How to decide by priority
If you use an iPhone and want the fewest compromises
Start with the SE 3. Its iOS-only design and Apple’s own integration are the strongest evidence-based reasons to stay within Apple’s ecosystem. Move to Garmin only if battery life or training depth outweighs that convenience.
If you hate daily charging
Look first at the vívoactive 6, Forerunner 165 or Amazfit Active 3 Premium. Their cited endurance claims are measured in days rather than hours. Select Garmin when built-in GPS and training are central; select Amazfit when the cited lower price is more important and you are willing to verify missing specifications yourself.
Rank #4
- Designed with a bright AMOLED display, get a more complete picture of your health, thanks to battery life of up to 11 days in smartwatch mode
- Body Battery energy monitoring helps you understand when you’re charged up or need to rest, with even more personalized insights based on sleep, naps, stress levels, workouts and more (data presented is intended to be a close estimation of metrics tracked)
- Get a sleep score and personalized sleep coaching for how much sleep you need — and get tips on how to improve it; key metrics such as HRV status help you better understand your health (data presented is intended to be a close estimation of metrics tracked)
- The smart wake alarm gently vibrates to wake you at the right optimal time
- Find new ways to keep your body moving with more than 80 built-in indoor and GPS sports apps, including walking, running, cycling, HIIT, mobility, swimming, golf and more
If you train for races
The Forerunner 165 is the most targeted recommendation in the supplied coverage. The vívoactive 6 is more balanced for people who want fitness, sleep and smartwatch duties in one device but do not need the most specialized running focus.
If you only need steps and occasional workouts
The Galaxy Fit 3 can be sufficient if phone-assisted GPS is acceptable. Paying more for a full GPS watch makes sense only when you will use independent route recording, richer training tools or broader smartwatch functions.
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The vívoactive 6 is the only model in the cited comparison explicitly identified as compatible with both platforms. The SE 3 is iOS-only; compatibility details for the Forerunner 165, Active 3 Premium and Galaxy Fit 3 are not established by the cited material and should be checked for your exact phone.
GPS, training and health tracking: what the evidence supports
GPS
The SE 3, vívoactive 6 and Forerunner 165 are identified as having GPS. The Galaxy Fit 3 is specifically listed without GPS. The Active 3 Premium’s GPS specification is not stated in the cited comparison, so it should not be treated as a confirmed independent GPS alternative without checking the current product documentation.
Training depth
The Forerunner 165 has the strongest training-specific recommendation. The vívoactive 6 covers general activity and heart-rate tracking. The SE 3 provides a broad smartwatch and fitness blend. The Galaxy Fit 3 is positioned as a basic band, while the cited Active 3 Premium comparison emphasizes price, display and battery rather than detailing training tools.
Health and sleep
The SE 3’s 32-hour Low Power Mode figure explicitly includes sleep tracking. TechRadar identifies heart-rate tracking for the vívoactive 6. The supplied comparisons do not provide a complete, model-by-model inventory of sensors, sleep stages, medical features or recovery metrics, so those should not be assumed equivalent across devices.
Water resistance, comfort and charging decisions
The SE 3 and vívoactive 6 are both identified with 5ATM water resistance. That rating is useful for everyday water exposure and swimming contexts covered by the manufacturer’s instructions, but it is not a promise that every water sport or depth is appropriate.
Best Value
- Designed with a bright, colorful AMOLED display, get a more complete picture of your health, thanks to battery life of up to 11 days in smartwatch mode (5 days display always-on)
- Body Battery energy monitoring helps you understand when you’re charged up or need to rest, with even more personalized insights based on sleep, naps, stress levels, workouts and more (data presented is intended to be a close estimation of metrics tracked)
- Get a sleep score and personalized sleep coaching for how much sleep you need — and get tips on how to improve plus key metrics such as HRV status to better understand your health (data presented is intended to be a close estimation of metrics tracked)
- Find new ways to keep your body moving with more than 30 built-in indoor and GPS sports apps, including walking, running, cycling, HIIT, swimming, golf and more
- Wheelchair mode tracks pushes — rather than steps — and includes push and handcycle activities with preloaded workouts for strength, cardio, HIIT, Pilates and yoga, challenges specific to wheelchair users and more (data presented is intended to be a close estimation of metrics tracked)
Case comfort is personal: smaller wrists may prefer a lighter or narrower device, while runners may prioritize a stable fit during repeated arm movement. The cited material gives a 1.32-inch display for the Active 3 Premium and 1.57-inch or 1.78-inch comparison sizes for the SE 3, but does not provide comparable case dimensions for every model. Try the case and band combination if possible rather than choosing on display size alone.
Charging speed and charging frequency are different decisions. The cited comparison describes the SE 3 as charging in under one hour and the Active 3 Premium in under two hours, while the Garmin and Samsung charging times are not stated. A fast charger is convenient, but a device that needs charging less often may still fit your routine better.
Buying checklist before you replace the SE 3
- Confirm your phone platform. The SE 3 is iOS-only. The vívoactive 6 supports Android and iOS. Verify the remaining models against your phone and region.
- Decide whether independent GPS is mandatory. Eliminate the Galaxy Fit 3 if you need route recording without carrying a phone. Treat the Active 3 Premium’s GPS capability as unconfirmed until checked.
- Set a charging tolerance. Choose a day-based endurance model if nightly charging is the reason for switching.
- Separate training needs from general fitness. Choose the Forerunner 165 for the strongest run-focused case; choose the vívoactive 6 for broader activity use.
- Check the current price in your country. The cited prices are specific US or Apple listings and can change with taxes, sales, stock and cellular-carrier terms.
- Verify the features you cannot lose. Confirm notifications, calls, payments, sleep tracking, health sensors and app support in the current regional documentation rather than assuming parity with Apple.
Common mistakes when choosing an alternative
- Comparing maximum battery claims with smartwatch behavior. The quoted figures are test or maximum claims; GPS, cellular, display settings and notifications can reduce endurance.
- Buying a band for phone-free runs. The Galaxy Fit 3 has no built-in GPS, so it is not a substitute for an independent running watch.
- Assuming all Garmin models are identical. TechRadar distinguishes the vívoactive 6’s heart-rate and GPS precision from some other Garmin models, while Tom’s Guide emphasizes the Forerunner 165’s training focus.
- Choosing on price alone. A lower upfront price may still be a poor fit if the device lacks the phone compatibility, GPS or notifications you rely on.
- Ignoring regional differences. Prices, discounts, stock, cellular support and feature availability can vary by country and carrier.
Bottom line
The Apple Watch SE 3 is still the best fit for an iPhone owner who values seamless integration over battery endurance. The Garmin vívoactive 6 is the strongest general-purpose alternative when multi-day battery, built-in GPS and cross-platform support matter. Pick the Garmin Forerunner 165 for run training, the Amazfit Active 3 Premium for the cited combination of lower US price and long battery life, and the Samsung Galaxy Fit 3 only when inexpensive basic tracking and phone-assisted location are enough.
Frequently Asked Questions
Can an Apple Watch SE 3 alternative work with an iPhone?
The Garmin vívoactive 6 is explicitly listed as compatible with iOS and Android. The SE 3 is iOS-only. The cited material does not establish complete compatibility details for the Forerunner 165, Amazfit Active 3 Premium or Galaxy Fit 3, so verify the current regional requirements before buying.
Which alternative has the longest cited battery life?
The Samsung Galaxy Fit 3 is listed at up to 13 days, followed by the Amazfit Active 3 Premium at up to 12 days and the Garmin vívoactive 6 at up to 11 days. These are cited maximum or test claims, not guaranteed everyday results.
Which model is best for running?
Tom’s Guide recommends the Garmin Forerunner 165 for its training tools, GPS and approximately week-long battery life.
Does the Samsung Galaxy Fit 3 have GPS?
No. TechRadar’s table lists the Galaxy Fit 3 without GPS, so outdoor route recording requires a paired phone when supported.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
