CMF by Nothing Watch 3 Pro Review 2026: Worth Buying?

Budget smartwatches used to feel like a compromise. You picked one, you accepted plastic, and you moved on. The CMF by Nothing Watch 3 Pro breaks that pattern. It costs under $100, yet it carries an aluminium frame, a bright AMOLED screen, dual band GPS, and a battery that refuses to quit.

I wore this watch daily for several weeks. I ran with it, slept with it, took calls on it, and pushed it until the flaws showed up. Some of those flaws matter. Others you will forget by the second week.

This review covers everything honestly. No hype, no sugar coating. Just what the watch does, what it fails at, and whether your money belongs here in 2026.

In a Nutshell:

• Price and value stand out. The Watch 3 Pro launched at $99 and often sells lower. At that figure, nothing else offers this mix of metal build, AMOLED clarity, and GPS accuracy. It genuinely feels like a $200 watch on the wrist.
• Battery life is the headline feature. Nothing claims 13 days of typical use and 10 days under heavy use. In real testing with the always on display active and workouts tracked, expect four to five days, which still beats almost every premium rival.
• Dual band GPS is the surprise. L1 and L5 signal support locks on in roughly six seconds and holds steady between tall buildings. This technology sat inside $400 running watches two years ago.
• Health tracking covers basics only. Heart rate, SpO2, stress, and sleep all work. Accuracy is fine for general effort, but it drifts by around 5 BPM during intervals compared with a chest strap.
• Swimming is off the table. The IP68 rating handles rain and sweat. CMF still advises against pools, showers, and saunas. Swimmers should look elsewhere.
• Smart features stay simple. No NFC payments, no third party apps, no Strava. You get notifications, calls, music control, and an AI news reader.

CMF by Nothing Watch 3 Pro: What You Actually Get

Last update on 2026-10-26 / Affiliate links / Images from Amazon Product Advertising API

The Watch 3 Pro is the third smartwatch from CMF, the budget arm of Nothing. It arrives with a 1.43 inch AMOLED panel, a 60Hz refresh rate, peak brightness near 670 nits, and a precision milled aluminium case weighing around 51 grams.

Inside sits dual band GNSS, a heart rate sensor, an SpO2 sensor, a speaker, and a microphone for Bluetooth calls. The watch supports more than 130 sport modes and pairs with both Android and iOS through the Nothing X app.

The pitch is simple. CMF stripped away the extras that inflate prices and spent the savings on the parts you touch and see every day. That strategy mostly works.

The Unboxing Experience

The box arrives flat and slim, printed in CMF’s signature industrial style with exposed typography and a dotted grid. It feels more like a design object than packaging. Sliding off the sleeve reveals the watch and strap laid out side by side rather than stacked.

Inside you find the watch body, the silicone strap, a magnetic charging cable, and a small documentation pack. That is it. No wall adapter, which is standard practice now.

The first thing I noticed was the weight. Picking it up, the metal frame feels cold and dense in a way cheap watches never do. Attaching the strap takes about ten seconds thanks to the quick release pins.

One small letdown: the charging cable feels thin, and the magnet grips weakly. More on that later.

Design and Build Quality

CMF went bold here. The orange variant draws attention immediately, while Light Grey, Dark Grey, and Light Green play it safer. Every colour option looks deliberate rather than cheap.

The aluminium frame carries fine machining lines along the edges. The crown turns with a satisfying click and actually scrolls menus, which many budget watches fake. At 51 grams the watch sits comfortably without feeling flimsy.

Here is the frustrating part. The previous Watch Pro 2 let you swap bezels on the fly. That modularity vanished. CMF never explained the removal, and it stung for fans who bought spare bezels.

The silicone strap breathes well during workouts and resists sweat stains. Build quality punches far above the asking price, even without the swappable parts.

Top 3 Alternative for CMF Watch 3 Pro

If the Watch 3 Pro misses the mark for you, these three deserve a look.

Amazfit Bip 6

Last update on 2026-10-28 / Affiliate links / Images from Amazon Product Advertising API

Xiaomi Smart Band 10

Last update on 2026-10-26 / Affiliate links / Images from Amazon Product Advertising API

Amazfit Active 2

Last update on 2026-10-28 / Affiliate links / Images from Amazon Product Advertising API

Display Quality in Daily Use

The 1.43 inch AMOLED panel is the star of the hardware. Blacks look genuinely black, colours pop against the monochrome interface, and the 60Hz refresh keeps scrolling smooth.

Indoor visibility is excellent. Outdoor visibility in normal daylight holds up fine too. Auto brightness reacts quickly, and the raise to wake gesture rarely misfires.

The always on display is where things fall apart. Step into direct sunlight with always on enabled and the time nearly disappears. I had to tap the screen or flick my wrist to read it, which defeats the purpose.

The watch face gallery deserves real praise. CMF designed dozens of faces with the same care Apple and Samsung apply. You can also load custom photo faces through the Nothing X app.

Battery Life and Charging Reality

Nothing rates the Watch 3 Pro at 13 days typical and 10 days heavy. Those numbers come from lab conditions with the always on display switched off and GPS limited to two hours weekly.

Real world results differ. With always on enabled, daily notifications flowing, and three or four GPS workouts per week, I averaged four to five days per charge. Switch off always on and you comfortably clear nine or ten days.

Charging takes roughly 90 minutes from empty. A 30 minute top up restored about 47 percent, enough for two more days.

The charger is the weak link. The magnetic puck detaches with the slightest nudge. I woke twice to a watch that never charged because the cable slipped off overnight.

Dual Band GPS Accuracy

This feature alone justifies the price. Dual band GNSS reads both L1 and L5 satellite signals, which cuts the reflection errors that ruin tracking near tall buildings.

Lock on time averaged six seconds in open conditions. That is faster than several watches costing triple. Routes traced through a city centre stayed on the correct side of the street instead of wandering into buildings.

Distance measurements landed within about one percent of a dedicated running watch across several runs. For casual runners, cyclists, and hikers, that accuracy is more than enough.

The limitation is mapping. There is no onboard map display, so you see a route only after syncing to the app. Navigation during a run is not possible.

Fitness and Workout Tracking

The watch supports over 130 sport modes, from running and cycling to football, parkour, and yoga. You choose which modes appear on the watch through the Nothing X app, which keeps the list manageable.

A built in running coach lets you set a target distance and finish time, then builds a training schedule around it. The plans stay simple but genuinely help beginners build consistency.

Automatic workout detection catches walks and runs reliably. It misses gym sessions more often.

One major gap exists. Swimming is absent from the workout list because the watch is not pool rated. If swimming forms part of your routine, this watch cannot serve you. Strength training metrics also stay shallow, logging duration and heart rate without rep counting.

Heart Rate and Health Sensors

The optical heart rate sensor performs decently at steady effort. During zone two running, readings tracked within about 2 BPM of a chest strap, which is respectable for this price.

Interval training exposes the limits. Sharp spikes in intensity caused lag, with gaps reaching 5 BPM during transitions. Averages came out lower than the chest strap recorded.

SpO2 readings arrive on demand or automatically every 30 minutes overnight. Stress tracking uses heart rate variability and feels more like a mood estimate than hard data.

Treat all of this as guidance, not diagnosis. The watch is a general effort gauge, not a training instrument. There is no skin temperature sensor, so cycle tracking relies on manual logging only.

Sleep Tracking Performance

Sleep tracking surprised me. Total sleep duration matched a premium tracker almost exactly across several nights, landing within seven minutes. Sleep scores came within one percentage point.

The watch logs light, deep, and REM stages along with awake periods. Stage breakdowns differed from reference devices, though every wearable struggles there, so this is not a specific failing.

Automatic detection works without any button press. Nap tracking also functions, which some rivals skip.

What is missing is interpretation. You get numbers and bar charts, but no written guidance explaining what poor deep sleep means or how to fix it. Competing brands at similar prices offer coaching text. CMF gives you data and leaves the thinking to you.

Smart Features, Calls, and AI

Bluetooth calling works through the built in speaker and microphone. Voices come through clearly in quiet rooms. In traffic or wind, callers struggle to hear you.

Notifications arrive reliably once you grant background permissions. Android users get quick replies for WhatsApp, Telegram, Instagram, Slack, and more. iPhone users cannot reply at all, which is a platform restriction rather than a CMF choice.

You also get calendar access, camera remote control, music playback control, alarms, timers, and a voice assistant trigger.

Essential News is the novelty feature. An AI voice reads out daily headlines. It sounds useful, but you cannot see the sources, so accuracy remains unverifiable. ChatGPT integration exists too, though it currently requires a Nothing phone.

Nothing X App Experience

The Nothing X app handles pairing, firmware updates, watch face downloads, workout selection, and health data review. Setup took under five minutes on Android.

The Health tab organises steps, heart rate, sleep, SpO2, and stress into clean cards. Google Health Connect support lets Android users push data into other fitness platforms.

Firmware updates have arrived steadily since launch, fixing early connectivity complaints that some owners reported.

The design feels flat. The monochrome palette suits the watch interface, but on a phone screen it reads as plain and uninspiring next to colourful rivals. Navigation also buries some settings two or three menus deep. Functional, but not delightful.

What the Watch 3 Pro Does Not Do Well

Honest reviews list the failures clearly, so here they are.

The watch cannot go swimming despite its water resistance rating. The always on display becomes unreadable in sunlight. The modular bezels from the previous generation disappeared with no replacement.

There is no NFC, so contactless payments are impossible. No third party app support means no Strava, no Spotify, and no Google Maps on the wrist.

Screen resolution sits lower than premium panels, which some owners notice on text heavy faces. Heart rate accuracy wobbles during intervals. Sleep data arrives without coaching. The charging cable detaches too easily.

A handful of early buyers also reported Bluetooth drops, though firmware updates appear to have reduced those complaints significantly.

Pros and Cons

Pros

• Outstanding value at under $100 with a milled aluminium frame
• Bright 1.43 inch AMOLED display with smooth 60Hz scrolling
• Dual band GPS that locks in about six seconds and stays accurate
• Battery runs four to five days hard, nine or more when conservative
• Excellent watch face library with custom photo support
• More than 130 sport modes plus a useful running coach
• Accurate sleep duration tracking and solid step counting
• Lightweight 51 gram body stays comfortable overnight

Cons

• Not safe for swimming, showers, or saunas
• Always on display fades badly in direct sunlight
• Modular bezels from the Watch Pro 2 were removed
• No NFC payments and no third party apps
• Heart rate drifts during interval training
• Sleep data lacks written insight or coaching
• Flimsy magnetic charger detaches easily
• Quick replies unavailable on iPhone

Who Should Buy the CMF Watch 3 Pro

Last update on 2026-10-26 / Affiliate links / Images from Amazon Product Advertising API

Buy this watch if you want a stylish, long lasting companion for notifications, step counting, and outdoor runs without spending real money. Students, casual runners, first time smartwatch owners, and anyone tired of nightly charging will enjoy it.

It suits Android users best, since quick replies and deeper integration live on that side.

Skip it if you swim, need contactless payments, train by precise heart rate zones, or rely on third party fitness apps. Serious athletes should spend more on a Garmin or Amazfit with mapping and better sensors.

The honest summary: this is the best looking and best performing smartwatch you can buy for around $99, provided your needs stay within its boundaries. Push past those boundaries and frustration follows quickly.

Final Verdict

The CMF by Nothing Watch 3 Pro earns a confident recommendation at its price. It delivers premium design, excellent battery life, and GPS accuracy that embarrasses watches costing far more.

It is not perfect. The missing pool rating, the faded always on display, and the dropped modularity all sting. The feature set stays deliberately basic.

Yet none of those flaws break the experience. They simply define who this watch serves.

Rating: 4.2 out of 5. CMF built a budget smartwatch that people actually want to wear, which is harder than it sounds. If a follow up adds proper waterproofing and richer health insights, the brand will have something genuinely disruptive.

Frequently Asked Questions

Can you swim with the CMF Watch 3 Pro?

No. The watch carries an IP68 rating and survives rain, sweat, and brief splashes. CMF specifically advises against pools, showers, hot springs, saunas, and diving. Swimming is also missing from the workout modes.

How long does the battery really last?

Expect four to five days with the always on display enabled and regular GPS workouts. With always on switched off and lighter use, nine to thirteen days is realistic. Full charging takes about 90 minutes.

Does it work with iPhone?

Yes, it pairs with iOS through the Nothing X app. You receive notifications and can take calls. Quick replies to messages are not available on iPhone, and some features behave better on Android.

Does the CMF Watch 3 Pro support contactless payments?

No. There is no NFC chip, so Google Pay, Apple Pay, and similar services do not work on this watch.

Is the GPS accurate enough for running?

Yes. Dual band L1 and L5 tracking locks on in roughly six seconds and keeps routes accurate within about one percent of dedicated running watches, even between tall buildings.

Can you change the straps?

Yes. The watch uses quick release pins and accepts standard 22mm straps, so third party options fit easily.