Apple Watch Series 1 vs Apple Watch Ultra 2

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Watch Series 1 compared with Watch Ultra 2

	AppleWatch Series 1	AppleWatch Ultra 2
Overview
Released
Released	September 2016	September 2023
Display
Case sizes
Case sizes	38 mm or 42 mm	49 mm
Panel
Panel	OLED	LTPO OLED
Peak brightness
Peak brightness	450 nits	3,000 nits (better)
Always-on display
Always-on display	No	Yes
Display detail
Display detail	Retina OLED with Force Touch; 272 x 340 pixels (38mm) or 312 x 390 pixels (42mm)	Always-On Retina LTPO2 OLED display; 410 x 502 pixels at 326 ppi; 1,185 sq mm display area; 1 nit minimum brightness; Night Mode with the Modular Ultra or Wayfinder watch face
Screen protection
Screen protection	Strengthened Ion-X glass	Flat sapphire crystal front
Health and fitness
ECG
ECG	No	Yes
Blood oxygen
Blood oxygen	No	Yes
Skin temperature
Skin temperature	No	Yes
Sleep apnoea alerts
Sleep apnoea alerts	No	Yes
High blood pressure alerts
High blood pressure alerts	No	Yes
Body composition
Body composition	No	No
Fall detection
Fall detection	No	Yes
Crash detection
Crash detection	No	Yes
GPS
GPS	None	Dual-band (L1 and L5)
Water resistance
Water resistance	–	100 m
Sensors
Sensors	Optical heart-rate sensor, accelerometer, gyroscope and ambient light sensor	Electrical heart sensor; third-generation optical heart sensor; temperature sensor; depth gauge to 40 m (±1 m accuracy); water temperature sensor; compass; always-on altimeter (–500 m to 9,000 m); high-g accelerometer (up to 256 g); high dynamic range gyroscope; ambient light sensor
Health features
Health features	Heart-rate monitoring; Activity rings and Breathe app in watchOS 3	Vitals app (heart rate, respiratory rate, wrist temperature, blood oxygen and sleep duration); irregular rhythm notifications; high and low heart rate notifications; low cardio fitness notifications; sleep stages and sleep score; Cycle Tracking with retrospective ovulation estimates; Medications; Mindfulness with state of mind tracking; Noise
Fitness features
Fitness features	Workout tracking; outdoor route tracking uses a paired iPhone's GPS (PhoneArena)	Customisable Action button with Precision Start; custom workouts; Training Load; Heart Rate Zones; Race Route; Pacer; stride length, ground contact time and vertical oscillation; automatic track detection; multisport workouts; offline maps with custom route creation; elevation alerts; swimming with custom pool workouts, stroke type tracking and SWOLF; recreational diving to 40 m with the Depth app or a dive computer app from the App Store; cycling power zones and cadence with Bluetooth accessories; GymKit
Safety features
Safety features	–	Emergency SOS; international emergency calling; Siren; Last Emergency Call Availability Waypoint; Check In; Backtrack; torch; noise monitoring
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 18 hours	Up to 36 hours
In low-power mode
In low-power mode	–	Up to 3 days
Mobile data option
Mobile data option	No	Yes
Works with
Works with	iPhone	iPhone
Chip
Chip	S1P	S9
Storage
Storage	8 GB	64 GB (better)
Battery life detail
Battery life detail	Built-in rechargeable lithium-ion battery	Multi-day figure tested over 36 hours with 600 time checks, 180 notifications, 30 minutes of app use and a 60-minute workout with music, including 8 hours on LTE; built-in rechargeable lithium-ion battery
Charging
Charging	Magnetic charging cable	Fast charging to 80% in about 1 hour
Connectivity
Connectivity	Wi-Fi 802.11b/g/n at 2.4GHz; Bluetooth 4.2; Apple support's updated compatibility requirement is iPhone 5s with iOS 11 or later	L1 + L5 precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS and BeiDou); 4G LTE and UMTS; Wi-Fi 4 (802.11n); Bluetooth 5.3; second-generation Ultra Wideband chip; Apple Pay
Storage
Storage	S1P dual-core processor name reported by Wareable; Apple specifications confirm a dual-core processor and 8 GB capacity	–
Design
Weight (lightest version)
Weight (lightest version)	25 g (better)	61.4 g
Software
Software	watchOS	watchOS
Case materials
Case materials	Anodised aluminium case and composite back; IPX7 under IEC 60529, splash and water resistant but submersion is not recommended	Grade 5 titanium case (95% recycled titanium) with ceramic and sapphire crystal back; water resistant to 100 m (ISO 22810:2010); EN13319 recreational scuba diving to 40 m; IP6X dust resistant; tested to MIL-STD 810H
Size
Size	38mm is 38.6 x 33.3 x 10.5 mm and 25 g; 42mm is 42.5 x 36.4 x 10.5 mm and 30 g; weights exclude the band	49 x 44 x 12 mm; 61.4 g (natural) or 61.8 g (black)
Bands
Bands	Sold with Sport Band; compatible with Sport, Woven Nylon, stainless steel and leather bands	Fits 130–210 mm wrists; Alpine Loop, Trail Loop and Ocean Band, plus Titanium Milanese Loop from September 2024
Colours
Colours	Silver, Space Grey, Gold and Rose Gold aluminium	Natural titanium; Black titanium from September 2024
In the box
In the box	–	Apple Watch Ultra 2, strap, Apple Watch Magnetic Fast Charger to USB-C Cable (1 m)