Apple Watch Series 12 vs Garmin Venu 4

Overview Apple Watch Series 12 and Garmin Venu 4 overlap more than their prices suggest. Both are round-cased touchscreen smartwatches with always-on display options, GPS on the watch, contactless payments, onboard music, an ECG app and no subscription requirement. Both come in two case sizes, and both track heart rate, sleep and workouts continuously. The differences that matter are structural: which phone you carry, how often you want to charge, and whether you want a smartwatch that tracks training or a training device that also works as a smartwatch. Price and ownership Series 12 starts at $399 and Venu 4 at $549.99. Both are bought outright, neither offers a trial, and neither requires a subscription to use its health or coaching features. Apple's figure covers the entry aluminium configuration; titanium and ceramic cases, the larger size and cellular models cost more. Garmin's price is the same across both case sizes, varying with finish and band. That no-subscription position is worth noting because it separates both from wearables sold as memberships, where the hardware is bundled into a recurring fee. Design and display Series 12 comes in 42mm and 46mm across aluminium, titanium and ceramic, eight finishes in total. Its Always-On Retina display drops to a 1Hz refresh, reaches 2000 nits at peak and goes down to 1 nit for dark rooms. Aluminium cases use Ceramic Shield 2, which Apple describes as 60% tougher than the Ion-X glass it replaces; titanium and ceramic cases use a sapphire front crystal. Venu 4 comes in 41 mm and 45 mm with a stainless steel bezel, a case of stainless steel and fibre-reinforced polymer, and Corning Gorilla Glass 3 over the screen. The 41 mm model carries a 1.2-inch, 390 x 390 AMOLED panel with an optional always-on mode, measures 41 x 41 x 12 mm, weighs 33 g without its band and fits wrists from 110 to 175 mm, on standard 18 mm quick-release straps. On water, Apple rates Series 12 at 50 m under ISO 22810:2010 with IP6X dust resistance and a depth gauge to 6 meters; Garmin rates Venu 4 at 5 ATM, which it describes as withstanding pressure equivalent to 50 metres depth. Both ratings cover showering and swimming. Battery life This is the widest gap in the comparison. Apple quotes up to 24 hours of normal use for Series 12, up to 38 hours in Low Power Mode and up to 10 hours of workout tracking, with fast charging reaching about 80% in roughly 30 minutes; 15 minutes buys up to 12 hours of normal use and 5 minutes covers up to 10 hours of sleep tracking. Garmin's own figures for Venu 4 are up to 10 days in smartwatch mode on the 41 mm and up to 12 days on the 45 mm, extending to 18 and 25 days in battery saver mode. With GPS running, Venu 4 lasts up to 15 hours on the 41 mm and 20 on the 45 mm in GPS-only mode, dropping to around 6 and 9 hours with all satellite systems and music together, and leaving the display always-on costs roughly two thirds of the smartwatch figure. In practice Series 12 is a nightly charge and Venu 4 is a weekly one. That also bears on sleep tracking, since a watch on the charger is a watch not on your wrist. Health tracking Series 12 is built around the Health Sensing System: a second-generation electrical heart sensor, an always-on optical sensor with larger and more power-efficient green LEDs, a blood oxygen sensor and a temperature sensor, working with the S11 chip. Apple states background heart rate readings every five seconds and HRV readings as often as every five minutes, figures it describes as 60 times and 24 times more frequent respectively than Series 11. A readiness score is generated each morning from recent activity, vitals and sleep, and adjusts through the day. The Sleep app records stages and duration, and a sleep score rates each night on duration, bedtime consistency, how often you wake and time spent in each stage. Venu 4 carries wrist heart rate, Pulse Ox, a barometric altimeter, compass, gyroscope, accelerometer, thermometer and ambient light sensor. On top of those sit Body Battery energy monitoring, all-day stress, respiration rate, HRV status, skin temperature, Fitness Age, nap detection and advanced sleep tracking with Sleep Coach and sleep alignment. It adds lifestyle logging, where you record things like caffeine or alcohol and see how they track against sleep, stress and HRV, and a Health Status feature that flags when metrics drift from your usual range. Garmin lists Health Status as being in beta. ECG and regulated features Both watches carry an ECG app, and both companies are explicit about the limits. Apple describes its ECG app as generating something similar to a single-lead electrocardiogram, intended for people 22 and over. Irregular rhythm notifications are not intended for people under 22 or anyone already diagnosed with atrial fibrillation. Hypertension notifications look for patterns over 30-day periods and are not intended for people under 22, anyone already diagnosed with hypertension, or pregnant people. Sleep apnea notifications are intended to detect signs of moderate to severe sleep apnea in people 18 and over who have not already been diagnosed. Apple describes these as health features with clinical validation and FDA clearance rather than diagnostic tools, describes Vitals, Blood Oxygen and temperature as serving wellness rather than medical purposes, and states that Cycle Tracking should not be used for birth control or to diagnose a condition. Garmin states that its ECG App records an ECG similar to a Lead I ECG and can detect atrial fibrillation or normal sinus rhythm, with availability regulated and varying by market. Pulse Ox is not a medical device, is not intended for diagnosing or monitoring any condition, and is not available in all countries. Menstrual cycle tracking should not be used for conception, contraception or birth control, and Health Status is in beta and subject to change. On both devices, regulated features depend on regional approval, so confirm what is active in your market before choosing on the strength of one of them. Fitness and recovery Series 12's Workout app covers a wide spread of activities, from running and cycling to swimming, strength training, badminton and barre, with custom workouts, customisable views, training load, heart rate zones, VO2 max, race route and pacer. Workout Buddy adds spoken insights during sessions, and Apple states step counting is more accurate on this generation. Its recovery layer is the morning readiness score. Venu 4 puts more structure around the same idea. Training readiness scores whether your body is prepared for a hard session, training status reads whether recent load is productive, and recovery time estimates how long to wait. Garmin Fitness Coach builds adaptive plans across more than 25 activities, adjusting daily against activity history, sleep and recovery, alongside running, cycling and strength coaching plans and daily suggested workouts. Strength, HIIT, yoga, pilates and cardio workouts come with on-screen animations and muscle maps, and Body Battery tracks energy through the day as a separate read from readiness. GPS and workouts Both have GPS on the watch, so runs and rides need no phone. Series 12 carries precision GPS and a second-generation Ultra Wideband chip. Venu 4 covers GPS, GLONASS, Galileo, QZSS and BeiDou with multi-band reception, plus Garmin's SatIQ mode, which trades accuracy against battery automatically. Venu 4 also includes a wheelchair mode and workouts built for wheelchair users, which is uncommon in this category. Smartwatch features Both run apps, show notifications, store music offline, take calls on the wrist through a paired phone and support contactless payments, Apple Pay on Series 12 and Garmin Pay on Venu 4. Series 12 adds GymKit, Wi-Fi, Bluetooth 5.3, 64GB of storage and optional cellular models supporting 5G RedCap and LTE, with Siri powered by Apple Intelligence and Audio Intelligence features including Live Rewind, Siri Recap, Shazam and Sound Recognition. Venu 4 has 8 GB of memory, Bluetooth, ANT+ and Wi-Fi, Connect IQ apps and watch faces, weather, calendar, morning and evening reports, a built-in speaker and microphone that also reach the paired phone's voice assistant, some voice commands that work on the watch alone, and an LED flashlight. On Venu 4, replying to texts and viewing images from notifications are Android-only. Phone compatibility Series 12 requires an iPhone, specifically iPhone 11 or later or iPhone SE second generation or later, running iOS 27 or later, and has no Android support. Venu 4 works the same way on iPhone and Android through Garmin Connect. If you carry an Android phone, this one line settles the comparison before any other criterion. If you carry an iPhone, both remain open. Apps and ecosystem Series 12 is a component of Apple's wider system, which is the main structural difference for anyone already holding an iPhone, AirPods or a Mac: health data lands in the Health app, notifications and handoff behave as one device, and the watch inherits Apple's app catalogue. Venu 4 syncs to Garmin Connect, where longer-term trends, lifestyle logging reports and coaching plans live, which works the same on either phone platform, and it pairs with Garmin's wider accessory range including heart rate straps and smart scales. Neither charges a subscription for its own platform. Which may suit you Series 12 may suit someone on an iPhone who wants one device for apps, calls, payments and health tracking, who values cardiovascular features with regulatory clearance, and who is content to charge nightly. Venu 4 may suit someone who wants training, readiness and recovery tooling in depth without a subscription, who would rather charge weekly than nightly, and who wants the same experience whichever phone they carry, including Android users for whom Series 12 is not an option. Anyone needing full topographic mapping for backcountry navigation is served by neither, since that belongs to Garmin's outdoor lines rather than the Venu range. Bottom line These are different products rather than two attempts at the same one. Series 12 is a smartwatch carrying a capable health sensor set, tied to one phone platform. Venu 4 is a fitness and wellness device with the battery and training depth to match, that also works as a smartwatch on either platform. The decision usually resolves on three questions before any feature list: which phone you carry, how often you are willing to charge, and whether training structure or ecosystem integration matters more to you. Prices, features and regional availability change; confirm current terms with Apple and Garmin before buying.