Apple Watch Series 3 vs. Series 4: A Detailed Comparison

The Apple Watch has become a staple for many, but choosing the right model can be tricky. The Series 3 and Series 4 offer distinct features and price points. This comparison dives deep into their differences to help you make an informed decision.
Phones Images

🏆 Quick Verdict

The Apple Watch Series 4 is the clear winner, boasting a larger, brighter display, faster performance, and improved health features. However, the Series 3 remains a solid, more affordable option for those prioritizing core smartwatch functionality and budget.

PHONES
Phone Names Apple Watch Series 3 Aluminum Apple Watch Series 4
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 2100 / 800 - Europe, Australia (A1891)HSDPA 850 / 900 / 2100 / 800 - Europe, Australia
4G bands1, 3, 5, 7, 8, 18, 19, 20, 26 - Europe, Australia (A1891)1, 3, 5, 7, 8, 18, 19, 20, 26 - Europe, Australia
SpeedHSPA, LTEHSPA, LTE
TechnologyGSM / HSPA / LTEGSM / HSPA / LTE
 1, 3, 39, 40, 41 - China (A1892)1, 3, 39, 40, 41 - China
Launch
Announced2017, September. Released 2017, September2018, September. Released 2018, September
StatusDiscontinuedDiscontinued
Body
BuildGlass front, ceramic back, aluminum frameGlass front (Sapphire crystal), ceramic/sapphire crystal back, stainless steel frame
Dimensions42.5 x 36.4 x 11.4 mm (1.67 x 1.43 x 0.45 in)44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in)
SIMeSIMeSIM
Weight34.9 g (1.23 oz)48 g (1.69 oz)
 50m water resistant50m water resistant ECG certified (region dependent SW application; HW available on all models)
Display
ProtectionIon-X strengthened glassSapphire crystal glass
Resolution390 x 312 pixels (~303 ppi density)448 x 368 pixels (~326 ppi density)
Size1.65 inches1.78 inches
TypeRetina OLED, 1000 nits (peak)Retina LTPO OLED, 1000 nits (peak)
 3D Touch display3D Touch display
Platform
CPUDual-coreDual-core
ChipsetApple S3Apple S4
GPUPowerVRPowerVR
OSwatchOS 4.0, upgradable to watchOS 8.7watchOS 5.0, upgradable to watchOS 10.6.1
Memory
Card slotNoNo
Internal8GB 768MB RAM, 16GB 768MB RAM16GB 1GB RAM
Sound
3.5mm jack NoNo
35mm jackNoNo
Loudspeaker YesYes
Comms
Bluetooth4.2, A2DP, LE5.0, A2DP, LE
NFCYesYes
PositioningGPS, GLONASSGPS, GLONASS, GALILEO, QZSS
RadioNoNo
USBNoNo
WLANWi-Fi 802.11 b/g/nWi-Fi 802.11 b/g/n
Features
SensorsAccelerometer, gyro, heart rate, barometerAccelerometer, gyro, heart rate, barometer
 Natural language commands and dictation (talking mode)Natural language commands and dictation (talking mode)
Battery
ChargingWirelessWireless
TypeLi-Ion 341 mAh (1.34 Wh), non-removableLi-Ion 292 mAh (1.12 Wh), non-removable
Misc
ColorsSilver, Gold, Space GraySpace Black, Silver, Gold
ModelsA1860, A1861, A1889, A1891, A1890, A1892, A1858, A1859A1975, A1976, A2007, A2008
PriceAbout 480 EURAbout 700 EUR
SAR0.52 W/kg (head)     0.34 W/kg (body)-
Camera
 NoNo

Apple Watch Series 3 Aluminum

  • Affordable
  • Reliable
  • Core smartwatch features
  • Wireless charging

  • Smaller display
  • Older processor
  • Limited health features compared to Series 4

Apple Watch Series 4

  • Larger, brighter display
  • Faster performance (S4 chip)
  • Improved health tracking (ECG)
  • Modern design

  • Higher price
  • Battery life not significantly improved

Display Comparison

The Series 4 features a significantly larger (1.78-inch vs 1.57-inch) and brighter display with thinner bezels, offering a more immersive viewing experience. The edge-to-edge design of the Series 4 is a noticeable upgrade, making it easier to read notifications and interact with apps.

Camera Comparison

Neither the Series 3 nor the Series 4 have a built-in camera. This is a consistent design choice for Apple Watches.

Performance

The S4 chip in the Series 4 provides a noticeable performance boost over the S3. Apps launch faster, animations are smoother, and overall responsiveness is improved. While both watches handle basic tasks well, the Series 4 feels more fluid and modern.

Battery Life

While both offer roughly the same advertised battery life (around 18 hours), the Series 4's more efficient S4 chip and slightly larger battery can sometimes provide marginally better real-world performance. However, usage patterns heavily influence battery life.

Buying Guide

The Apple Watch Series 3 Aluminum is ideal for budget-conscious users who want basic smartwatch features like notifications, activity tracking, and Apple Pay. The Series 4 is perfect for those seeking a premium experience with a larger display, enhanced health tracking (ECG), and faster performance.

Frequently Asked Questions

❓ Is the Apple Watch Series 4 worth the extra cost?
If you value a larger display, faster performance, and advanced health features like ECG, then the Series 4 is worth the investment. However, if you're on a budget and primarily need basic smartwatch functionality, the Series 3 remains a viable option.
❓ Can the Series 3 receive software updates indefinitely?
Apple typically supports older devices with software updates for a few years. While the Series 3 will eventually stop receiving updates, it will likely remain functional for a reasonable amount of time.