Comparison · Fitness watches · Desk research
Google Pixel Watch 3 vs Google Pixel Watch 4
Quick Answer
Pixel Watch 3 and Pixel Watch 4 share 41mm / 45mm recycled-aluminum cases, 12.3mm height, Gorilla Glass 5 Actua AMOLED LTPO, 5 ATM / IP68, and Google Help’s Android pairing rule (Watch 3: Android 10.0+; Watch 4: Android 11.0+). Pixel Watch 3 (Help 12651869): Snapdragon W5 Gen 1 + Cortex-M33, Wear OS 5.0, 32GB eMMC + 2GB SDRAM, up to 2,000 nits, Bluetooth 5.3, US GPS/Galileo/Glonass (no dual-frequency row), 41mm 307 mAh / 45mm 420 mAh, up to 24 hours.
The verdict
Google Pixel Watch 3 or Google Pixel Watch 4 — quote the two manufacturer sheets.
Why: Consecutive Pixel hop on the same Help page (answer 12651869). Shared 41/45mm recycled-aluminum class, 12.3mm height, 5 ATM / IP68, Actua AMOLED LTPO, and ECG-capable electrical sensors. Pixel Watch 4 adds Snapdragon W5 Gen 2, Wear OS 6.0, 3,000 nits, Bluetooth 6.0, US dual-frequency GPS, Satellite SOS on the US LTE row, and 45mm 455 mAh / 40h AOD (41mm 325 mAh / 30h). Pixel Watch 3 is W5 Gen 1, Wear OS 5.0, 32GB + 2GB SDRAM, 2,000 nits, Bluetooth 5.3, single-frequency GPS on the Help row, 307 / 420 mAh, 24h AOD / 36h Saver. Do not write dual-frequency or satellite as Watch 5-only — they arrive on Watch 4.
Buy Google Pixel Watch 3 if
You already wear Pixel Watch 3 and 24-hour AOD plus Wear OS 5 still match how you use the watch.
Buy Google Pixel Watch 4 if
You want the leftover current-minus-one Pixel Watch: Wear OS 6, US dual-frequency GPS, Satellite SOS, and the 30/40-hour AOD table.
Spec comparison
Both columns from Google Help — Pixel Watch technical specifications, accessed 19 September 2026. Caption size when quoting battery.
| Spec | Pixel Watch 3 | Pixel Watch 4 |
|---|---|---|
| Sizes | 41mm and 45mm; 12.3mm; 31g / 37g without band | 41mm and 45mm; 12.3mm; 31g / 36.7g without band |
| Display | Actua; Gorilla Glass 5; 320 ppi AMOLED LTPO; up to 2,000 nits | Actua 360; same glass class; 320 ppi AMOLED LTPO; up to 3,000 nits |
| Chip | Snapdragon W5 Gen 1; Cortex-M33 | Snapdragon W5 Gen 2; Cortex-M55 |
| OS | Wear OS 5.0 | Wear OS 6.0 |
| Storage | 32GB eMMC + 2GB SDRAM | 32GB eMMC + 2GB SDRAM |
| Battery 41mm | 307 mAh typical; 24h AOD; 36h Saver | 325 mAh typical; 30h AOD; 48h Saver |
| Battery 45mm | 420 mAh typical; 24h AOD; 36h Saver | 455 mAh typical; 40h AOD; 72h Saver |
| GNSS (US) | GPS, Galileo, Glonass | Dual Frequency GPS: GPS, Galileo, Glonass |
| Satellite | Not on the Watch 3 Help chunk | Satellite SOS on the US LTE connectivity row |
| Bluetooth | 5.3 | 6.0 |
| Water | 5 ATM; IP68 | 5 ATM; IP68 |
| Phone | Android 10.0 or newer | Android 11.0 or newer |
Frequently asked questions
Did dual-frequency GPS arrive on Pixel Watch 5?
No. On Help 12651869, Pixel Watch 4’s US GPS row already lists Dual Frequency GPS. Watch 3’s US row lists GPS, Galileo, Glonass without the dual-frequency label.
Do both sizes of Pixel Watch 3 share the 24-hour AOD claim?
Yes. 41mm (307 mAh) and 45mm (420 mAh) both list up to 24 hours AOD and 36 hours Battery Saver. Watch 4 splits: 41mm 30/48 hours, 45mm 40/72 hours.