Apple Watch Series 4 vs Apple Watch Series 5

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Watch Series 4 compared with Watch Series 5

	AppleWatch Series 4	AppleWatch Series 5
Overview
Released
Released	September 2018	September 2019
Display
Case sizes
Case sizes	40 mm or 44 mm	40 mm or 44 mm
Panel
Panel	LTPO OLED	LTPO OLED
Peak brightness
Peak brightness	1,000 nits	1,000 nits
Always-on display
Always-on display	No	Yes
Display detail
Display detail	Retina LTPO OLED with Force Touch; 40mm 324 x 394 pixels and 759 sq mm; 44mm 368 x 448 pixels and 977 sq mm; display wakes by wrist raise (PhoneArena)	Always-On Retina LTPO OLED with Force Touch; 40mm 324 x 394 pixels and 759 sq mm; 44mm 368 x 448 pixels and 977 sq mm; screen dims with wrist down
Health and fitness
ECG
ECG	Yes	Yes
Blood oxygen
Blood oxygen	No	No
Skin temperature
Skin temperature	No	No
Sleep apnoea alerts
Sleep apnoea alerts	No	No
High blood pressure alerts
High blood pressure alerts	No	No
Body composition
Body composition	No	No
Fall detection
Fall detection	Yes	Yes
Crash detection
Crash detection	No	No
GPS
GPS	Single-band	Single-band
Water resistance
Water resistance	50 m	50 m
Sensors
Sensors	Electrical and optical heart sensors; barometric altimeter; accelerometer up to 32 g-forces, improved gyroscope and ambient light sensor	Electrical and second-generation optical heart sensors; compass, barometric altimeter, accelerometer up to 32 g-forces, gyroscope and ambient light sensor
Health features
Health features	ECG capability, high and low heart-rate alerts and irregular-rhythm notifications; ECG app was not available at hardware launch and reached the UK in March 2019	ECG capability; Cycle Tracking and Noise apps in watchOS 6
Fitness features
Fitness features	GPS, GLONASS, Galileo and QZSS; swimming, yoga and hiking workouts, automatic workout reminders, cadence, pace alerts and rolling mile pace in watchOS 5; GymKit	GPS/GNSS and GymKit; Compass app shows heading, incline, latitude, longitude and elevation; Activity Trends on iPhone
Safety features
Safety features	Hard-fall detection can call emergency services after immobility and notify emergency contacts; Emergency SOS	Fall detection and Emergency SOS; international emergency calling on cellular versions in supported regions, even without an activated cellular plan
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 18 hours	Up to 18 hours
Mobile data option
Mobile data option	Yes	Yes
Works with
Works with	iPhone	iPhone
Chip
Chip	S4	S5
Storage
Storage	16 GB	32 GB (better)
Battery life detail
Battery life detail	Built-in rechargeable lithium-ion battery	Built-in rechargeable lithium-ion battery
Charging
Charging	Magnetic charging cable and USB power adapter	Magnetic charging cable and USB power adapter
Connectivity
Connectivity	W3 wireless chip; Wi-Fi 802.11b/g/n at 2.4GHz; Bluetooth 5.0; cellular versions add LTE and UMTS with a compatible plan; GPS requires iPhone 5s, cellular iPhone 6, both with iOS 12 at launch	W3 wireless chip; Wi-Fi 802.11b/g/n at 2.4GHz; Bluetooth 5.0; cellular versions add LTE and UMTS; requires iPhone 6s or later with iOS 13 at launch
Design
Weight (lightest version)
Weight (lightest version)	30.1 g (better)	30.8 g
Software
Software	watchOS	watchOS
Case materials
Case materials	Aluminium or stainless steel case; ceramic and sapphire crystal back; water resistance under ISO 22810:2010 for shallow-water swimming	Aluminium, stainless steel, titanium or white ceramic; ceramic and sapphire crystal back; 50 m rating under ISO 22810:2010 for shallow-water swimming
Size
Size	40mm 40 x 34 x 10.7 mm, 30.1 g aluminium or 39.8 g steel; 44mm 44 x 38 x 10.7 mm, 36.7 g aluminium or 47.9 g steel; weights exclude bands	40mm 40 x 34 x 10.74 mm, aluminium 30.8 g, steel 40.6 g, titanium 35.1 g or ceramic 39.7 g; 44mm 44 x 38 x 10.74 mm, aluminium 36.5 g, steel 47.8 g, titanium 41.7 g or ceramic 46.7 g; case weights exclude bands
Bands
Bands	Compatible with earlier Apple Watch bands of the corresponding size; Nike+ includes Nike bands and watch faces; Hermès includes leather bands and exclusive faces. Nike+ became available 5 October 2018	Apple Watch Studio offers case and band choices within collections; Nike includes exclusive faces and Nike bands; Hermès includes leather bands and exclusive faces. Nike reached stores 4 October 2019
Colours
Colours	Silver, Space Grey and Gold aluminium; Silver, Space Black (DLC) and Gold (PVD) stainless steel; Nike+ Silver or Space Grey; Hermès polished stainless steel	Silver, Space Grey or Gold aluminium; steel, Space Black (DLC) or Gold (PVD) stainless steel; natural or Space Black titanium; White ceramic; Nike Silver or Space Grey; Hermès steel or Space Black steel
In the box
In the box	Watch and band, magnetic charging cable and USB power adapter	Watch and band, magnetic charging cable and USB power adapter