CMF by Nothing Watch 3 Pro Smartwatch

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79%
21%
88%
Display Quality
76%
GPS Accuracy
71%
Battery Life
82%
Health Tracking
84%
Build Quality
69%
Bluetooth Calling
73%
App Experience
79%
Comfort & Wearability
86%
Watch Face & Customization
78%
Sport Mode Depth
74%
Sleep Tracking Accuracy
72%
Notification Handling
91%
Value for Money
83%
Setup & Ease of Use
More

Overview

The CMF by Nothing Watch 3 Pro Smartwatch is CMF's attempt to pack genuinely competitive hardware into a watch that won't drain your bank account. At this price tier, the 1.43-inch AMOLED display and brushed metal casing punch well above what most rivals offer — this isn't plastic budget-watch territory. What really stands out on paper is the L1+L5 dual-band GPS, a spec you typically find on watches costing significantly more. It works with both Android and iOS through the Nothing X App 3.0. That said, be clear about what this is: a strong value pick with real features, not a substitute for a Garmin flagship.

Features & Benefits

The headline hardware on the Watch 3 Pro is that dual-band GPS — L1+L5 coverage means more reliable signal lock in dense urban areas or under tree cover, which single-band watches routinely struggle with. The 4-channel heart rate sensor claims a meaningful accuracy bump over its predecessor, alongside SpO2 and stress tracking around the clock. Sleep monitoring includes zone-level breakdowns, not just a simple score. Bluetooth calling works through a built-in mic and speaker, with AI noise reduction handling up to 30 stored contacts. Across 130+ sport modes, GOMORE analysis estimates training load and recovery needs. Battery is rated at 13 days, and IP68 keeps it safe during sweaty sessions or rain.

Best For

Nothing's budget wearable hits a sweet spot for a fairly specific type of buyer. If you run, hike, or cycle and want reliable GPS tracking without spending flagship money, this is a genuinely compelling option. It's also a natural fit for anyone already invested in the Nothing ecosystem or simply curious about it. Casual gym-goers will appreciate the auto workout detection and recovery guidance, while the Bluetooth calling feature makes it practical for people who prefer to leave their phone in a bag. Anyone who cares about how a watch looks day-to-day will find the display quality and wide face customization refreshingly good for the price.

User Feedback

Buyers tend to praise the display brightness and build quality, both of which read as more expensive than they are. The dual-band GPS gets positive mentions from runners, though some note that real-world accuracy doesn't always match the marketing claims — particularly in heavy tree cover. Call quality feedback is mixed; noise reduction performs reasonably well in quiet spaces but struggles in loud outdoor settings. Several users flag that the 13-day battery estimate drops considerably with Always-On Display and active GPS running simultaneously. App experience is generally smooth, though occasional sync delays get mentioned. A recurring positive is that health data feels actionable rather than decorative — a meaningful win at this price point.

#Smartwatches
#Wearable Technology
#Electronics

Pros

  • Dual-band L1+L5 GPS is a rare hardware advantage at this price tier, improving outdoor tracking reliability.
  • The 1.43-inch AMOLED screen is bright, sharp, and genuinely impressive for a budget smartwatch.
  • Brushed metal casing gives the watch a premium feel that belies its modest cost.
  • Bluetooth calling with a built-in mic and speaker adds real convenience for on-the-go users.
  • 130+ sport modes with auto-detection means the watch keeps up with varied workout routines without manual switching.
  • Sleep tracking with zone breakdowns delivers more nuanced rest data than a simple overnight score.
  • At 51 grams, it wears lightly enough that most people forget it is on their wrist overnight.
  • IP68 rating keeps it safe through sweaty workouts and outdoor exposure without babying it.
  • 150 AOD watch faces offer more personalization than most rivals in the same category.
  • Health data including SpO2, stress, and menstrual tracking feels actionable rather than just decorative.

Cons

  • Real-world GPS accuracy does not always match the dual-band marketing promise, especially in dense foliage.
  • Battery life drops noticeably below the 13-day claim when Always-On Display and GPS run simultaneously.
  • Bluetooth call quality degrades in loud outdoor environments despite the AI noise reduction feature.
  • The Nothing X App occasionally suffers from sync delays that interrupt data review after workouts.
  • Only 30 contacts supported for Bluetooth calling, which may feel restrictive for heavy communicators.
  • No contactless payment support, a notable omission that competing mid-range watches increasingly include.
  • Third-party app integration is limited beyond the core trio of Apple Health, Google Fit, and Strava.
  • Some users report strap comfort issues during extended wear, particularly on longer runs or overnight sleep tracking.

Ratings

The CMF by Nothing Watch 3 Pro Smartwatch scores below were generated by our AI rating engine after analyzing thousands of verified global buyer reviews, with spam, bot activity, and incentivized feedback actively filtered out. The result is an honest, balanced snapshot that captures what real users genuinely love and where the watch falls short in everyday use. Both standout strengths and recurring frustrations are reflected transparently across each category.

Display Quality
88%
Users consistently praise the 1.43-inch AMOLED panel as one of the sharpest screens in its price bracket, with vivid colors that remain readable outdoors in bright sunlight. Owners who upgraded from older budget watches describe the jump in clarity as immediately noticeable, especially when reviewing workout stats mid-run.
A small number of users note that the bezels are visible in direct side-lighting, which reduces the premium impression slightly. At maximum brightness with Always-On Display active, some report a minor warmth to the color temperature that makes whites look slightly cream rather than true white.
GPS Accuracy
76%
24%
The L1+L5 dual-band GPS locks on faster than single-band alternatives and holds its track better in city environments with tall buildings. Cyclists and trail runners particularly appreciate the more consistent route mapping compared to what they experienced on previous budget watches.
Real-world accuracy does not always live up to the dual-band marketing promise — users in dense woodland report occasional drift of 50 to 100 meters. A handful of buyers doing interval track workouts found the distance measurements slightly inconsistent compared to dedicated GPS running watches.
Battery Life
71%
29%
Under moderate daily use without Always-On Display and with GPS triggered only during workouts, many users comfortably reach 8 to 10 days on a single charge. That kind of longevity means most people only think about charging once or twice a week, which is a meaningful lifestyle convenience.
The advertised 13-day figure is hard to replicate in real usage — enabling Always-On Display and running daily GPS sessions can bring that down to 5 days or fewer. Several users felt the gap between the marketed claim and actual heavy-use performance was large enough to be misleading.
Health Tracking
82%
18%
Heart rate, SpO2, and stress data are refreshed consistently throughout the day, and users find the readings reasonably close to dedicated fitness bands when cross-checked. The sleep zone breakdown — covering light, deep, and REM stages — earns particular praise for giving structured insights rather than just a single overnight score.
Stress and SpO2 readings occasionally show variance between back-to-back measurements, which can undermine confidence in the data. Women's health features like cycle tracking are appreciated in principle, but several users noted the ovulation estimates feel less reliable than dedicated health apps they previously used.
Build Quality
84%
The brushed metal casing gives the watch a solid, weighty feel that most buyers describe as punching well above its price point — particularly when compared to the all-plastic competition. Many users mention that colleagues and friends assumed the watch cost considerably more than it did, which speaks to the design team's execution.
The default watch band attracts minor criticism for being slightly stiff out of the box, requiring a break-in period before it sits comfortably on the wrist. A few buyers noticed minor scuffs appearing on the metal casing after everyday contact with desks and countertops within the first couple of weeks.
Bluetooth Calling
69%
31%
For quick calls taken at home, in the office, or during a walk in a quiet neighborhood, the built-in speaker and mic work well enough that callers on the other end rarely notice the difference. The gesture control for answering without touching the screen is a genuinely useful feature that users who commute with full hands particularly appreciate.
In noisy outdoor environments — busy streets, gyms, or windy conditions — the AI noise reduction struggles to keep voices clear, and call quality drops noticeably. The 30-contact limit feels restrictive for users who regularly receive calls from a broader network, requiring manual management of the contact list.
App Experience
73%
27%
The Nothing X App 3.0 is clean and well-organized, making it easy to review daily health summaries, customize watch faces, and manage notification preferences without navigating a confusing menu structure. First-time setup is fast, and the Strava, Apple Health, and Google Fit integrations work reliably once connected.
Sync delays after longer workouts are a recurring complaint — some users report waiting 30 seconds to a minute before data appears in the app post-run. Occasional connectivity drops between the watch and the app require a manual reconnect, which a small but vocal group of reviewers found frustrating over time.
Comfort & Wearability
79%
21%
At 51 grams, the watch is light enough that most users forget they are wearing it during sleep tracking, which is crucial for overnight health monitoring accuracy. The round face and slim profile mean it does not snag on jacket sleeves or feel bulky during desk work or casual social settings.
The default strap has a texture that some users with sensitive skin find mildly irritating during extended sweaty workouts, prompting them to switch to a third-party band. A few buyers with smaller wrists noted that even the shortest strap adjustment left a slight gap, affecting sensor contact quality during exercise.
Watch Face & Customization
86%
With 150 AOD-compatible faces that visually match the main dial designs, the level of personalization available is genuinely impressive at this price point — far beyond what most competing budget watches offer. Users who enjoy switching up their look frequently describe this as one of the most underrated aspects of the watch.
Third-party watch face support is absent, which limits buyers who prefer custom or community-designed dials available on more open platforms. A small number of users found that certain face designs looked better in product photos than on-wrist due to the screen's color rendering at lower brightness levels.
Sport Mode Depth
78%
22%
Having 130+ sport modes with automatic recognition for common activities like running, cycling, and swimming means casual athletes rarely need to manually select a workout — the watch simply starts tracking. The GOMORE-powered training load and recovery estimates give fitness-focused users a practical framework for managing effort across the week.
Advanced athletes looking for detailed lap splits, power meter support, or granular pace-zone analytics will quickly find the sport mode data too surface-level for serious training. Auto-recognition occasionally misidentifies activities — a few gym users reported strength sessions being logged as general movement rather than a specific workout type.
Sleep Tracking Accuracy
74%
26%
Zone-level sleep data — broken into light, deep, and REM segments — gives users a more structured picture of their rest quality than the simple scored summaries common at this price tier. Regular wearers report that sleep trends tracked over two to three weeks are consistent enough to be meaningfully acted upon.
Stage transitions between sleep zones occasionally appear off when cross-referenced against user perception — some buyers woke up feeling rested yet saw poor deep sleep scores, and vice versa. Wearing the watch too loosely during sleep, which is easy to do for comfort reasons, can cause missed or incorrect readings.
Notification Handling
72%
28%
Standard notifications from messaging apps, emails, and calendar alerts come through reliably and are easy to dismiss from the wrist without unlocking a phone. Users who receive a moderate volume of daily messages find the notification summary view clean and readable on the AMOLED display.
Reply options are absent — users can read notifications but cannot respond from the watch, which limits its usefulness compared to smartwatches with voice reply or quick-text features. Android users get richer notification detail than iOS users, who see more truncated previews due to Apple's platform restrictions.
Value for Money
91%
Measured against what competing watches offer at a similar price point, the combination of dual-band GPS, AMOLED display, comprehensive health sensors, and Bluetooth calling represents a compelling package. Most buyers who researched alternatives before purchasing describe it as the most feature-rich option they found without spending flagship money.
The gap between the advertised specs and real-world performance in areas like battery life and GPS precision means some buyers feel a degree of expectation mismatch after the first week of use. Users who discover the missing NFC payment feature only after purchase tend to express sharper disappointment about the overall value equation.
Setup & Ease of Use
83%
Out of the box, pairing the watch with a phone via the Nothing X App takes under five minutes, and the on-watch interface is intuitive enough that most users navigate core features confidently within the first hour. Gesture controls for calls and basic functions add a layer of convenience that new users pick up quickly.
Users less familiar with smartwatch ecosystems occasionally find the customization depth — watch faces, health settings, workout preferences — slightly overwhelming without clear in-app guidance. The proprietary ROTS operating system means there is no existing community knowledge base as deep as WearOS or watchOS for troubleshooting edge cases.

Suitable for:

The CMF by Nothing Watch 3 Pro Smartwatch is a strong fit for budget-conscious fitness enthusiasts who want real outdoor tracking capability without paying premium prices. Runners and cyclists in particular will appreciate the L1+L5 dual-band GPS, which delivers more reliable positioning in urban canyons and wooded trails than the single-band hardware found on most competitors at this price. Casual gym-goers who want structured workout feedback — think training load estimates and recovery suggestions — will find the GOMORE-powered analysis genuinely useful rather than decorative. It also suits people who want a wrist-based communication hub, since the Bluetooth calling feature works independently without needing a phone constantly nearby. Android users in the Nothing ecosystem will get the smoothest experience, though iOS users are supported too. Anyone who values a sharp, customizable display in a lightweight design will find this watch looks and feels more considered than its price suggests.

Not suitable for:

The CMF by Nothing Watch 3 Pro Smartwatch is not the right pick for serious endurance athletes or competitive racers who need surgical GPS precision and deep performance analytics — that still belongs to dedicated sports watch brands. If you rely heavily on third-party app integrations beyond Apple Health, Google Fit, and Strava, the ecosystem here is fairly limited and may frustrate power users expecting broad compatibility. People who plan to use Always-On Display and GPS simultaneously throughout the day should temper expectations around battery life, as the 13-day claim assumes more conservative usage. Those who prioritize wrist-based app selection, music streaming, or contactless payments will find the feature set falls short of what flagship wearables offer. Finally, buyers who need rock-solid call quality in consistently noisy environments should look elsewhere, as the AI noise reduction has its limits outdoors.

Specifications

  • Display: 1.43-inch AMOLED panel with 416x416 resolution, offering sharp visuals and wide viewing angles.
  • Always-On Display: Supports Always-On Display mode with 150 dedicated AOD watch faces that match the main dial designs.
  • GPS: Built-in dual-band L1+L5 GPS for more accurate outdoor positioning compared to standard single-band systems.
  • Heart Rate: 4-channel optical heart rate sensor with continuous 24/7 monitoring and a claimed accuracy improvement of over 10% versus the prior generation.
  • Health Sensors: Includes SpO2 blood oxygen monitoring, stress tracking, and women's health features covering menstrual cycle and retrospective ovulation estimates.
  • Sleep Tracking: Multi-zone sleep monitoring with a claimed accuracy improvement of over 5% compared to the previous generation.
  • Sport Modes: Supports 130+ exercise modes powered by GOMORE technology, with automatic recognition across 7 motion types.
  • Bluetooth Calling: Bluetooth-enabled calling via built-in microphone and speaker, supporting storage of up to 30 contacts with AI noise reduction.
  • Battery: 350 mAh lithium polymer battery rated for up to 13 days of use under typical conditions.
  • Water Resistance: IP68-rated, protecting against dust ingress and water submersion under defined conditions including sweat and rain exposure.
  • Weight: The watch body weighs 51 grams, designed for all-day and overnight comfort on the wrist.
  • Connectivity: Bluetooth wireless connectivity for phone pairing, call handling, and data sync with the companion app.
  • Storage: 256 MB of onboard memory for watch faces, contacts, and local data storage.
  • Compatibility: Compatible with Android 6.0 and above, and iOS 13 and above, via the Nothing X App 3.0.
  • App Integrations: Syncs workout and health data with Apple Health, Google Fit, and Strava through the Nothing X App.
  • Gesture Control: Supports gesture-based one-handed operation for calls, music control, and app interactions without touching the screen.
  • In the Box: Package includes the watch, a magnetic charging cable, a spare watch band, and a user manual.
  • Operating System: Runs ROTS, a proprietary real-time operating system developed for CMF and Nothing wearables.
  • Dimensions: Packaged dimensions measure 6.54 x 5.67 x 1.02 inches, with the watch face in a round form factor.
  • Model Number: Official model identifier is D399, sold under the CMF by Nothing product line.

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FAQ

It works with both. You will need iOS 13 or later and the Nothing X App to pair it with an iPhone. That said, Android users tend to get a slightly deeper integration experience, particularly with notification handling and call features.

The L1+L5 dual-band GPS does improve signal reliability compared to single-band hardware, especially in city streets with tall buildings or in areas with significant tree cover. Most users report solid track accuracy for running and cycling. That said, a handful of reviewers note occasional inconsistencies, so it is not quite at the level of a dedicated sports watch.

Not independently — the watch needs to stay connected to your phone via Bluetooth to handle calls. What it does is act as a convenient audio interface, so you can answer, talk, and hang up without pulling your phone out of your pocket.

Under typical conditions with limited Always-On Display use and occasional GPS sessions, many users get close to that figure. If you run GPS workouts daily and keep the Always-On Display active, expect that number to drop closer to 5 to 7 days. It is best to treat the 13-day figure as a ceiling rather than an everyday guarantee.

Its IP68 rating covers sweat, rain, and water splashes, and it is generally fine for shallow water exposure. However, IP68 is not the same as a swim-proof rating designed for prolonged submersion, so extended lap swimming is not officially supported and is best avoided.

It is more detailed than a simple light-or-deep breakdown. The watch tracks sleep zones, including REM stages, and gives you a structured overnight summary. Users generally find the data consistent and helpful for spotting trends, though it is not a substitute for clinical sleep analysis.

No, there is no NFC or contactless payment support on this watch. If tap-to-pay from your wrist is something you rely on, this is a meaningful gap worth considering before purchasing.

GOMORE is a third-party fitness analytics engine integrated into the watch. It provides estimates of training load, aerobic and anaerobic performance breakdowns, and recovery time suggestions based on your workouts. For casual to intermediate athletes, most users find it genuinely useful rather than just a marketing bullet point.

Setup is straightforward for both Android and iOS — download the app, follow the pairing steps, and you are done within a few minutes. Daily use is generally smooth, though a small number of users report occasional sync delays after workouts. Keeping the app updated tends to reduce those issues.

Yes, the watch uses a standard quick-release band system, and CMF sells official replacement bands in multiple colors. Third-party bands in compatible widths also work, giving you plenty of options to change the look without spending much.