If you have had your eye on a modern high-tech smartwatch for a while, you will probably be very excited to lay your hands on at least one Apple watch series. However, choosing which design and model might be a tough decision for you to make. To make your task easier, we’ve broken down Apple Watch’s options in 2021 for you to decide by comparing their features right from the screen sizes, internal storage, connectivity, and many more. If you own an iPhone or iPod, the Apple Watch is another wearable companion for you.

 Apple released two versions last year, 2020, the Series 6 and the SE. However, the other old versions are still on sale, including the series 5, 4, and 3. Continue reading for specs and features to see which one will suit your lifestyle. 

Apple series 3

This is the oldest Apple watch on our list. This series 3 is a recommended watch, and it’s a very well-priced option if you are on a budget and want a basic fitness tracker compatible with an iPhone. Despite being older than the recent ones, it offers you a great deal of fitness tracking. However, If you have tried the latest Apple watches, you’ll notice that it is lower in quality and doesn’t have some new features like fall detection or electrocardiograms. 

More features:

-768MB RAM and 16 GB internal storage 

-50m water resistance 

-Wi-Fi 802.11 b/g/n | Bluetooth4.2


-Sensors: Accelerometer, gyro, heart rate, barometer

-Li-Ion 341 mAh, non-removable (1.34 Wh) 


-Wireless charging

-Up to 18 h battery life  

Apple watch series 4

This is the next version after series 3. It has more features and hi-tech features than series 3, with the largest screen resolution. The watch screen is capable of accommodating displays. With this, you can carry out any action. It has an inbuilt speaker which is about 50% louder than its predecessor. Apple watch series 4 has an inbuilt battery that lasts up-to to 18-hours with a single charge (Some users claimed it last longer than that!)

More features:

-16 GB internal storage and 1GB RAM

-GPS + Cellular + 4G

-Over 30% larger display

-Next-generation Electrical and optical heart sensors

-ECG app and Digital Crown with haptic feedback

-50% louder speaker

-S4 SiP with a faster 64-bit dual-core processor

-Improved accelerometer and gyroscope for fall detection


-WatchOS 5

-LTE and UMTS, Wi-Fi 802.11b/g/n 2.4GHz, Bluetooth 5.0

watch SE

A good replacement for the series 5 is the Apple watch SE. This has admirable features, such as an expansive retina display so you can see more at a glance. It has advanced next-generation sensors to track all the ways you move and powerful health monitoring features to keep you healthy and safe. Watch SE is definitely a better watch than series 4 or 3. It looks exactly like the Apple Watch Series 5 or Series 6. 

More features:

-1GB RAM and 32 GB internal storage

-Wi-Fi 802.11 b/g/n

-Bluetooth 5.0, A2DP, LE

-GPS: Yes, with A-GPS, GLONASS

-Sensors – Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass

-18hrs battery life 


-50m water resistance

-Swim-proof design

-64-bit dual-core S5 processor; Up to 2x faster than S3

Apple watch series 6

This model was released along with the Apple watch SE in 2020. It is the latest and most advanced Apple watch with a new feature of measuring blood oxygen. If you’ve been able to take optical wrist-based SpO2 tracking on fitness trackers like Garmins for years, then this new feature of Apple isn’t necessarily a “new” feature to you. This device is more of a fitness tracker with the ability to detect sleep apnea and keep track of early-warning Covid-19 signs. It takes an electrocardiogram from your wrist anywhere and anytime. Connect to your iPhone (not compatible with Android) to get the coordinate and direction of a place easily.

More features:

-32 GB internal storage 

-LTE and UMTS, Built-in GPS, GLONASS, Galileo, and QZSS, 

-64-bit dual-core S6 processor; Up to 20 percent faster than S5

-Always-on Altimeter 

-Bluetooth 5.0

-18hrs battery life 

-GPS model allows you to pick calls and reply to texts from your wrist

-Measure your blood oxygen with an all-new sensor and iPhone app

-Check your heart rhythm with the ECG app

-Swim-proof design 


Notify of
Inline Feedbacks
View all comments