When Apple announced the Apple Watch SE 3 in September 2025, I expected a decent budget watch. I was wrong. After weeks of testing the Apple Watch SE 3 40mm, I discovered it offers flagship performance and an Always-On Display at a price that undercuts the competition by 40%. The biggest shock? It uses the same S10 chip as the expensive Series 11, making it feel faster and smarter than any “budget” gadget has a right to be. If you want the core Apple Watch experience without the premium price tag, this watch isn’t just a compromise—it’s the smartest buy of 2026.
The Biggest Surprise: The Screen is Finally “Always-On”
The most significant upgrade to the Apple Watch SE 3 40mm is the addition of an Always-On Display (AOD), a feature previously reserved for premium models.
For years, the biggest complaint about the SE line was the lack of an Always-On Display. With previous models, you had to do an awkward wrist flick just to see the time, which felt cheap. With the Apple Watch SE 3 40mm, that is gone. The screen is now Always-On, making the watch feel like a real timepiece rather than a gadget that sleeps until you shake it.
Brightness and Clarity
I was worried that because this is a cheaper watch, the screen might be dim, but that wasn’t the case. The display on the Apple Watch SE 3 40mm reaches up to 1,000 nits of peak brightness. While the top-tier watches go brighter (up to 2,000 nits), 1,000 nits is plenty bright for almost any situation, including sunny days.
The screen uses OLED and LTPO technology, the same tech found in premium phones and watches, ensuring deep colors and rich visuals. The resolution on the 40mm model is 324 x 394 pixels, which looks sharp enough for reading text and maps.
However, the bezels (the black border around the screen) are slightly larger than the new Series 11. The design mirrors the one Apple introduced in 2020 with the Series 6. While some might call this “old,” it looks clean and modern, especially in the Starlight or Midnight finishes.
Performance That Feels Like a Flagship
If the screen was the visual surprise, the speed was the performance shocker, as the Apple Watch SE 3 40mm refuses to feel like a budget device.
Usually, budget gadgets feel a little slow, lagging when you open apps or scroll. The Apple Watch SE 3 40mm does not feel slow. It is incredibly snappy, matching the responsiveness of watches costing twice as much.
The Power of the S10 Chip
Apple put the S10 chip inside this watch, the exact same processor found in the much more expensive Apple Watch Series 11 and Ultra 3. This was a huge move by Apple, as the SE line typically gets older chips. By giving the SE 3 the S10, Apple ensured this watch is “future-ready.”
Because of this chip, apps open instantly. Siri works right on the watch without needing to talk to your phone first, a feature called “on-device Siri.” This makes asking questions or setting timers much faster and more reliable.
New Ways to Control Your Watch
The S10 chip also unlocked cool new gestures that I didn’t expect to find on a $249 watch:
- Double Tap: Tap your thumb and index finger together twice to answer a call or stop a timer.
- Wrist Flick: Flick your wrist to dismiss notifications or silence an alarm.
These features felt like magic when I first tried them. They make the watch feel very high-tech, proving that the S10 chip makes the SE 3 far more than just an entry-level watch.
Battery Life: Better Than the Official Numbers
Battery life is always a worry with smartwatches, but the Apple Watch SE 3 40mm exceeded my expectations in real-world testing.
Apple officially says the Apple Watch SE 3 40mm lasts for 18 hours. This is the standard number they have used for years. But in my real-world testing, the watch did much better.
Real-World Testing
I wore the watch all day, tracked a workout, and even slept with it to track my sleep. With the Always-On Display turned on, I consistently got between 20 to 25 hours of battery life. Some users have reported getting up to 24 hours easily. This means I could wake up, wear it all day, track my sleep at night, and still have a little bit of battery left before charging it the next morning.
Low Power Mode is a Game Changer
If you know you are going to have a long day, there is a “Low Power Mode.” When I turned this on, the battery life stretched all the way to 32 hours. This is amazing for weekend trips where you might not want to carry your charger. The watch turns off some background tasks to save power, but it still tells the time and tracks your steps.
Fast Charging
Another nice surprise is how fast it charges. The Apple Watch SE 3 40mm charges much faster than the old SE 2:
- You can get a 65% charge in just 50 minutes.
- Other reports say you can hit 80% in about 45 minutes.
- Even a quick 15-minute charge gives you enough power for 8 hours of use.
This fast charging means if you forget to charge it at night, you can just pop it on the charger while you shower and get ready, and it will last you the whole day.
Health Features: What’s New and What’s Missing
Health tracking is a big reason why people buy Apple Watches, and the Apple Watch SE 3 40mm brings some surprising advanced features to the budget category.
I was very surprised to find advanced health sensors in this model, features that were once exclusive to the most expensive watches.
The Surprising Additions
- Sleep Apnea Notifications: The watch can now notify you if it detects signs of sleep apnea. This is a serious health condition, and having this feature on a budget watch is a big deal.
- Temperature Sensing: It includes a temperature sensor. This helps with tracking your sleep quality and can even give estimates for ovulation cycles.
- Sleep Score: There is a new “Sleep Score” feature that gives you a number out of 100 to tell you how well you slept. One user mentioned waking up to a score of 96, which helped them understand their rest better.
- Heart Rate Tracking: It has an accurate optical heart rate sensor that warns you if your heart rate is too high or too low.
The Missing Features
To keep the price down at $249, Apple did leave out a few things.
- No ECG: You cannot take an electrocardiogram (ECG) to check your heart rhythm. This feature is only on the Series 11 and Ultra 3.
- No Blood Oxygen: The sensor to measure blood oxygen levels is also missing.
- No Hypertension Alerts: It does not have the new high blood pressure alerts found on the premium models.
For most people, the heart rate tracking and sleep features are enough. But if you specifically need ECG or blood oxygen data for medical reasons, you would need to spend more money on the Series 11.
| Feature | Apple Watch SE 3 40mm | Apple Watch Series 11 |
|---|---|---|
| Heart Rate Sensor | Yes | Yes |
| Sleep Apnea Notifications | Yes | Yes |
| Temperature Sensing | Yes | Yes |
| ECG App | No | Yes |
| Blood Oxygen Sensor | No | Yes |
| Hypertension Alerts | No | Yes |
Durability: Built to Last
I am often clumsy with my gadgets, so durability is key for me, and the Apple Watch SE 3 40mm feels tougher than its price suggests.
Apple says the front glass is “Ion-X” glass, and it is four times more resistant to cracks than the glass on the SE 2. This 4x crack resistance gives me a lot of peace of mind. Whether I bumped it against a door frame or wore it while playing sports like badminton, the screen stayed safe.
The watch is also water-resistant up to 50 meters (5ATM), so I could wear it in the pool or ocean without worry. The case is made of aluminum, which keeps it very light. The 40mm GPS model weighs only 26.3 grams. It feels so light on the wrist that I often forgot I was wearing it, which is perfect for sleeping.
Design and Comfort: Is 40mm Too Small?
The Apple Watch SE 3 40mm comes in two sizes: 40mm and 44mm, and I tested the 40mm model to see if it feels too small for modern use.
Some people worry that 40mm is too small for a modern smartwatch. However, the 40mm size is ideal for smaller wrists, but it also looks great on average-sized wrists if you prefer a sleeker look. The case is 40mm tall, 34mm wide, and 10.7mm deep. It fits wrists ranging from 150mm to 200mm with the standard M/L strap.
One user on Reddit mentioned that it takes 3-4 days to get used to the size if you are coming from a larger 44mm watch, but after that, the 40mm feels premium and expensive. Another user said the dial size is “perfectly enough for viewing”.
The watch comes in two colors: Midnight (a dark blue/black) and Starlight (a soft silver/gold). These colors look very premium and match almost any outfit. You can also change the bands to add more color if you want.
Connectivity and Storage
Even though it is the “budget” watch, the connectivity options on the Apple Watch SE 3 40mm are excellent and future-proof.
- 5G Support: If you buy the cellular model, it supports 5G networks. This means faster downloads and better call quality when you leave your phone at home.
- Wi-Fi and Bluetooth: It has Wi-Fi 4 and Bluetooth 5.3 for connecting to your phone and headphones.
- Storage: The watch comes with 64GB of storage. This is the same amount of storage as the expensive Series 11. You can store plenty of music and podcasts directly on the watch to listen to offline with Bluetooth headphones.
Price and Value: The Best Deal in 2026?
Now, let’s talk about the price, because this is where the Apple Watch SE 3 40mm really shines and dominates the market.
- USA Price: It starts at just $249 for the 40mm GPS model. The 44mm model is $279.
- UK Price: It starts at £219.
- India Price: In India, it is priced at Rs 25,900 for the 40mm model.
Compare this to the Apple Watch Series 11, which starts at $399 (or £369), or the Ultra 3 which is $799. The SE 3 costs about 40% less than the Series 11 but gives you the same S10 chip, the same Always-On Display, and the same gestures.
One reviewer called it the “bargain of iPhone smartwatches”. Another said it “completely ruined the 2k-3k android smartwatches” for them because the value is just so high. You are getting flagship performance for a mid-range price.
Software: WatchOS 26
The watch runs on watchOS 26 right out of the box, the latest software from Apple that brings a fresh look and new features.
This software includes a new “Liquid Glass” design that looks very modern. You get full access to Apple Pay, rich notifications, music controls, and thousands of third-party apps.
The software experience is smooth and intuitive. Because of the S10 chip, there is no lag when switching between apps or using new widgets. Apple promises long software support, so this watch should stay up to date for many years.
Final Verdict: Should You Buy It?
After spending weeks with the Apple Watch SE 3 40mm, my answer is a loud “Yes,” as it stands out as the best value smartwatch of the year.
What Surprised Me Most:
- The Always-On Display: It makes the watch feel premium and useful at a glance.
- The S10 Chip: It is as fast as the most expensive watches, ensuring smooth performance.
- The Battery Life: It easily lasts over 20 hours in real use, beating official claims.
- The Price: At $249, it is an incredible value that undercuts competitors significantly.
Who Should Buy It?
This watch is perfect for most people. If you want an iPhone smartwatch that tracks your fitness, sleep, and health without breaking the bank, this is the one to get. It is great for students, fitness lovers, and anyone who wants a reliable daily driver.
Who Should Skip It?
You should only skip this if you absolutely need an ECG sensor or blood oxygen monitoring for medical reasons. If you need those specific features, you will have to pay extra for the Series 11. Also, if you want the very latest design with tiny bezels and 2,000 nits brightness, the Series 11 is the upgrade.
But for everyone else, the Apple Watch SE 3 40mm is the best smartwatch deal of 2026. It proves that you don’t need to spend $400 or $800 to get a great Apple Watch experience. The SE 3 delivers almost everything that makes the Apple Watch great, at a price that feels like a steal.
In a world where tech keeps getting more expensive, the Apple Watch SE 3 40mm is a refreshing reminder that great value still exists. It surprised me by being better than I ever expected, and it might just surprise you too.
Frequently Asked Questions (FAQ) About the Apple Watch SE 3 40mm
1. Does the Apple Watch SE 3 40mm have an Always-On Display?
Yes. This is the biggest upgrade from the old SE 2. The screen on the Apple Watch SE 3 40mm stays on all the time, so you can see the time and your watch face without lifting your wrist. It gets bright enough (1,000 nits) to see clearly even in sunlight.
2. What is the battery life of the Apple Watch SE 3 40mm?
Apple officially says the battery lasts 18 hours. However, real-world tests show it often lasts longer, typically between 20 to 25 hours with normal use. If you turn on “Low Power Mode,” it can last up to 32 hours. It also charges very fast, reaching 80% in about 45 minutes.
3. Does the Apple Watch SE 3 40mm have ECG or Blood Oxygen sensors?
No. To keep the price low at $249, Apple did not include the ECG (heart rhythm) or Blood Oxygen sensors. It does track your heart rate continuously and will alert you if it is too high or too low. It also tracks sleep, temperature, and steps. If you need ECG or blood oxygen data, you would need to buy the more expensive Apple Watch Series 11.
4. Is the Apple Watch SE 3 40mm good for small wrists?
Yes, it is perfect. The 40mm size is designed for smaller wrists but looks great on average wrists too. It is very light (only 26.3 grams), so you barely feel it. It fits wrist sizes from 150mm to 200mm with the standard band. Many users find it much more comfortable for sleeping and working out than the larger 44mm or 46mm models.
5. What is the price of the Apple Watch SE 3 40mm?
The official starting price in the USA is $249 for the GPS model. The GPS + Cellular model (which lets you leave your phone at home) costs more, usually around $299. In the UK, it starts at £219, and in India, it is priced at ₹25,900. This makes it the most affordable new Apple Watch you can buy in 2026.
6. Can I use the Apple Watch SE 3 40mm without an iPhone?
Not for setup. You need an iPhone (iPhone 11 or later with iOS 26) to set up the watch. However, if you buy the GPS + Cellular model, you can leave your iPhone at home once it is set up. You can make calls, send texts, and stream music directly from your wrist. There is also a “Family Setup” feature that lets parents set up the watch for kids who don’t have their own iPhone.
7. Is the Apple Watch SE 3 40mm waterproof?
Yes. It is water-resistant up to 50 meters. You can wear it while swimming in a pool or the ocean, and in the shower. However, it is not designed for deep diving or high-speed water sports like scuba diving. After swimming in salt water, you should rinse it with fresh water.
8. How much storage does the Apple Watch SE 3 40mm have?
It comes with 64GB of storage. This is the same amount as the expensive Series 11. You can use this space to download music, podcasts, and apps so you can listen to them offline without your phone nearby. This is great for runners who want to leave their phone at home.
9. What colors does the Apple Watch SE 3 40mm come in?
The Apple Watch SE 3 40mm is available in two aluminum colors: Midnight (a dark blue that looks almost black) and Starlight (a soft silver with a hint of gold). These colors are neutral and match almost any outfit or band style.
10. Is the Apple Watch SE 3 40mm worth buying in 2026?
Yes, absolutely. It is widely considered the best value smartwatch of the year. It has the same fast S10 chip as the expensive models, an Always-On Display, and great battery life, all for $249. Unless you specifically need ECG or blood oxygen sensors, the SE 3 40mm gives you 90% of the Apple Watch experience for much less money.