NASHVILLE, Tenn. (WKRN) – – What's the difference between an Apple Watch Series 4 and a Series 3? Well, $ 120 for starters!
It's a little more than that, but just a little.
When you ask which series fits you best, look at the similarities and additional features in 4.  The first thing you want to notice is the size. The Series 4 has a much larger screen. It's much easier
to see icons and read messages by 4. It's also a little thinner and works a bit faster. These are the main differences between the two.
A Series 4 (44mm) costs $ 420, while a Series 3 (42mm) is now $ 390.
What do both bells do?
Both 3 and 4 have heart sensors on the back of the clock, the part that keeps in touch with your
wrist. You can see your heart rate immediately using an app, and set alerts if it also turns
fast or too slowly.
Both 3 and 4 work with other health programs that bring all information into Apple Health App.
They track both workout sessions, steps and breathe. Use an app like Strong tracks workouts in the weight space.
By using the "Sleep ++" app, you'll see how to sleep. How long did you sleep, how many hours you slept and how much of it was really relaxed.
Only Series 4 can take an ECG or ECG. Electro-cardiogram.
Just put your finger on the digital crown or sidebar and hold it for 30 seconds. This will show you if an irregular heartbeat is detected that can signal atrial fibrillation, a serious heart problem that may require acute attention.
You may notice any symptoms you currently have and later share it with your doctor.
The ability to take an ECG is really crucial to the need for an Apple Watch Series 3 or 4. Other than that and the screen size, Both models are the same things.
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