Home / Smartwatch / Comparison
Apple Apple Watch Series 4 vs Apple Apple Watch Series 6
Apple Apple Watch Series 4 ($73) vs Apple Apple Watch Series 6 ($83) — side-by-side specs, weight, pros and cons to help you pick the right smartwatch.
Spec-by-spec
| Spec | Apple Apple Watch Series 4 | Apple Apple Watch Series 6 |
|---|---|---|
| Price | $73 | $83 |
| Weight | 36.7g | 36.5g |
| Chip | S4, 64-bit dual-core | S6, 64-bit dual-core |
| Display | 30% larger Retina OLED vs Series 3 | Always-on Retina OLED |
| Sensors | Electrical + optical heart sensor, ECG | Blood oxygen (SpO2) + ECG + heart rate |
| Safety | Fall detection | — |
| WR | 50m | 50m |
| Weight | 36.7g (Apple published, 44mm Aluminum) | 36.5g (Apple published, 44mm Aluminum) |
| Charging | — | 20% faster than Series 5 |
Pros & Cons
Apple Apple Watch Series 4
- First Apple Watch with an ECG sensor
- Meaningfully larger display in the same case size class
- Fall detection, a safety feature that debuted here
- Digital Crown haptic feedback, still felt today
- No always-on display
- watchOS support window is closing
- Speaker and mic are a generation behind current models
- Battery health on a used unit is unverifiable before buying
Apple Apple Watch Series 6
- Blood oxygen sensor, a meaningful addition over Series 5
- Faster S6 chip, noticeably snappier in daily use
- Faster charging than any earlier Series watch
- Always-on display carried over from Series 5
- Blood oxygen readings are wellness-only, not medical grade
- watchOS support window is closing
- Aluminum case shows wear more than steel or titanium on a used unit
- No always-on altimeter, that came later with Ultra
Apple Apple Watch Series 4 is the better value at $73. If weight matters most, Apple Apple Watch Series 6 carries lighter at 36.5g. Both are part of our curated smartwatch index — tap through to check current pricing.
More Smartwatch comparisons
Apple Apple Watch Ultra 3 vs Apple Apple Watch Series 11Apple Apple Watch Ultra 3 vs Apple Apple Watch SE (3rd Gen)Apple Apple Watch Ultra 3 vs Apple Apple Watch Series 10 (46mm)Apple Apple Watch Ultra 3 vs Apple Apple Watch Series 9 (45mm)Apple Apple Watch Ultra 3 vs Apple Apple Watch Series 8 (45mm)Apple Apple Watch Ultra 3 vs Apple Apple Watch Series 7 (45mm)