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Short answer: The CMF Watch 3 Pro is worth considering if you want a large AMOLED screen, built-in dual-band GPS, basic smartwatch tools, and long intervals between charges. It is a poor match for regular swimming, medical-grade health tracking, or buyers who expect a full app ecosystem. Nothing's US store showed a $79 price and an Add to bag control when checked; price and stock can change. Nothing US store
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This is a research-based buying guide, not a hands-on ProperlyGeek test. Product specifications below come from Nothing; observations from independent testing are attributed to the reviewers who made them.
On this page: Quick take · Features · Phone support · Water and health limits · Who should buy it? · FAQ
Quick take
| Consider it if… | Look elsewhere if… |
|---|---|
| You want a round watch with a 1.43-inch AMOLED display and built-in dual-band GPS. | You need a watch explicitly approved for pool swimming or diving. |
| You use Android 6.0 or later, or iOS 13 or later, and are comfortable pairing through Nothing X. | A particular app or phone feature is essential; verify its support for your exact phone and region before buying. |
| You prefer a simpler watch with a multi-day battery claim over a high-maintenance flagship. | You want a compact case; the Watch 3 Pro is a large watch and comes in one case size. |
What the Watch 3 Pro offers
The main hardware story is straightforward: a 1.43-inch AMOLED display, built-in dual-band GPS, and a manufacturer claim of up to 13 days of battery life. Those are useful specifications for someone who wants to see workout data on a large round screen and record an outdoor activity without carrying a phone. They do not, by themselves, establish how accurate the watch will be for a particular runner or route. Nothing's US product page
The watch also supports notifications, phone-linked calls, music controls, and health and activity functions. Nothing's feature support page lists heart-rate measurements, blood-oxygen measurements, sleep detection, stress monitoring, steps, calories, distance, and workout duration. Some daily tools and connected features depend on the Nothing X app and a paired phone. One concrete audio limitation: Nothing says the watch does not directly connect to Bluetooth earphones; to control music, connect the earphones to the phone and use the watch as a controller. Nothing support: features
Battery claims deserve context. “Up to 13 days” is a best-case manufacturer figure, not a guarantee for every combination of screen settings, tracking, notifications, and calls. Wareable reports that its test unit lasted roughly four to five days with always-on display enabled and several workouts tracked. That is one reviewer's use, not a universal prediction, but it is a more realistic planning reference for feature-heavy use than the maximum claim. Wareable's review
Phone support: Android and iPhone
Nothing lists Nothing X compatibility with Android 6.0 or later and iOS 13 or later. That means an eligible iPhone can pair with the watch; it does not establish that every feature works identically on iOS and Android. Before buying, check the exact app listing and your phone's OS version, then confirm any function that matters to you—such as notifications, call handling, camera control, or health-data syncing—against current Nothing support for your model. Nothing's app compatibility answer
For audio, Nothing says the watch cannot connect directly to Bluetooth earphones; the phone remains the audio source, while the watch controls playback. That is a practical limit if you want to leave your phone behind and listen from the watch. Nothing support
Water and health limits
Nothing identifies the Watch 3 Pro as IP68-rated. That rating alone does not tell a buyer that the watch is intended for lap swimming. Separately, Wareable reports that CMF does not recommend taking it to a pool and notes that swimming is not among the available workout modes. ProperlyGeek did not test it in water, so the practical advice is simple: if you need pool tracking, choose a watch whose maker explicitly supports that activity. Nothing US product page · Wareable's review
Nothing lists heart-rate, SpO2, sleep, and stress tools for reviewing personal trends; their presence does not establish clinical accuracy. ProperlyGeek makes no claim that these readings diagnose, prevent, or treat a condition, and they should not replace medical equipment or professional advice. Wareable's comparison of one night's sleep data found similar total sleep duration to its Whoop device but discrepancies in sleep-stage results. That is one reviewer's observation, and it reinforces why sleep-stage labels should not be treated as a medical assessment. Nothing support · Wareable's test notes
Two other review findings help set expectations. Wareable found the always-on display difficult to read in direct sunlight, so outdoor glances may require waking the screen. The same reviewer reported a full charge in about 90 minutes and noted that the magnetic charging connection could detach if knocked. These are observations from Wareable's review unit, not guarantees for every unit or setup. Wareable's review
Who should buy it?
The Watch 3 Pro makes the most sense for someone who wants a smartwatch-shaped daily companion, standalone GPS for occasional outdoor workouts, notifications, and a bright display. It may also suit a buyer who wants basic fitness summaries without daily charging, provided they understand the battery figure varies with use.
Skip it if your priority is pool swim tracking, clinical health monitoring, or a smaller wrist fit. If you already own the CMF Watch Pro 2, the decision is less obvious: TechRadar's reviewer concluded the newer model was not a compelling upgrade for that owner group. The bigger screen and dual-band GPS matter most to someone who specifically wants those changes; an owner satisfied with the older watch can reasonably keep it. TechRadar's review
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If you want to check current product listings, search Amazon for CMF Watch 3 Pro. Search results are not proof that any particular listing is the same regional version or an authorized seller, so verify seller, model, returns, and price on the listing.
Frequently asked questions
Does the CMF Watch 3 Pro work with iPhone?
Nothing X supports iOS 13 and later, so compatible iPhones can pair with the Watch 3 Pro. Individual features can differ by phone and app version; check the function you need before purchase. Nothing support
Can you swim with the CMF Watch 3 Pro?
Do not choose it for pool workouts. Nothing lists an IP68 rating, while Wareable reports that CMF does not recommend taking it to a pool and that there is no swimming workout mode. Follow the maker's current regional instructions and choose a model explicitly intended for pool tracking. Nothing · Wareable
How long does its battery last?
Nothing claims up to 13 days. Wareable reports roughly four to five days with always-on display and several workouts in its test. Your results depend on settings and use. Nothing · Wareable
Are its health readings medical-grade?
This guide does not treat the heart-rate, blood-oxygen, sleep, or stress functions as diagnostic tools. They are consumer wellness features; consult a qualified health professional for medical questions.
The buying decision comes down to priorities: the Watch 3 Pro offers an appealing screen and built-in dual-band GPS in a simple companion watch, while its water-use limits and basic smart platform rule it out for some buyers. Check the latest Nothing product and support pages for your region before ordering.
Header image: AI-generated editorial illustration, not a product photograph or test setup.
