What Series Is The 38mm Apple Watch

by Barbara Wilson

The 38mm Apple Watch holds a special place in the history of wearable technology. As a first-generation model, commonly referred to as Series 0, it marked Apple’s entry into the smartwatch market. Released in April 2015, this watch set the foundation for subsequent models, showcasing Apple’s commitment to integrating advanced technology with everyday wearables. This article delves into the specifics of the 38mm Apple Watch, exploring its initial features, packaging contents, and the evolution of the Apple Watch series up to the latest models, with a detailed look at the Apple Watch Series 9.


The 38mm Apple Watch: Series 0

Design and Packaging

The 38mm Apple Watch, part of the first generation or Series 0, came in a sleek A1553 box. The box included:

  • A magnetic charging cable
  • A USB power adapter
  • A bracelet
  • A quick start guide

This packaging reflected Apple’s signature minimalist design philosophy, providing everything necessary to start using the device immediately.


Technical Specifications

Despite being the inaugural model, the 38mm Apple Watch packed several impressive features:


Dimensions: With a height of 38mm, width of 33.3mm, and depth of 10.5mm, it was compact and comfortable for daily wear.

Display: It featured a Retina display with Force Touch technology, allowing for a clear and responsive user interface.

Sensors: Equipped with an accelerometer, gyroscope, and heart rate sensor, it supported various health and fitness tracking capabilities.

Processor: Powered by the Apple S1 chip, it provided adequate performance for a range of applications.


The 38mm Apple Watch introduced several groundbreaking features that have since become standard in smartwatches:

Health and Fitness Tracking: Including a heart rate monitor, step counter, and activity rings to track daily movement, exercise, and standing.

Notifications: Seamless integration with the iPhone for notifications, messages, and calls.

Customization: Interchangeable bands and customizable watch faces allowed users to personalize their devices.

Evolution of the Apple Watch Series

Apple has continually refined and expanded the capabilities of the Apple Watch series. Each new model brought enhancements in performance, design, and functionality.

Apple Watch Series 1 and 2

Series 1: Released in 2016, it featured an upgraded dual-core processor for improved performance but retained much of the original design.

Series 2: Launched simultaneously, it introduced built-in GPS, water resistance up to 50 meters, and a brighter display, making it more versatile for fitness and outdoor activities.

Apple Watch Series 3

Released in 2017, Series 3 brought significant advancements, including:

  • Cellular Connectivity: Allowing users to make calls, send messages, and stream music without an iPhone.
  • Improved Performance: The new S3 processor provided faster performance and smoother user experiences.
  • Enhanced Fitness Features: Including a barometric altimeter for tracking elevation.

Apple Watch Series 4

The 2018 release of Series 4 marked a major redesign:

  • Larger Display: An edge-to-edge display increased the screen size without significantly altering the watch’s dimensions.
  • ECG Functionality: Enabled users to take electrocardiograms directly from their wrists, enhancing its health monitoring capabilities.
  • Fall Detection: Automatically alerted emergency services if a hard fall was detected.

Apple Watch Series 5

Series 5, introduced in 2019, continued the trend of innovation:

  • Always-On Display: Ensured that the watch face was always visible without needing to raise the wrist.
  • Compass: Added a built-in compass for improved navigation.
  • Expanded Storage: Increased internal storage to 32GB.

Apple Watch Series 6 and SE

Series 6: Launched in 2020, it featured:

  • Blood Oxygen Monitoring: Added a new sensor for measuring blood oxygen levels.
  • Enhanced Performance: With the S6 chip, it offered faster processing and improved battery life.
  • New Colors and Bands: Introduced new case colors and band styles.

Apple Watch SE: Also released in 2020, it provided a more affordable option with many of the essential features of the Series 6, but at a lower price point.

Apple Watch Series 7

Series 7, released in 2021, offered:

  • Larger and More Durable Display: A more robust display with thinner borders and crack-resistant glass.
  • Faster Charging: Reduced charging time for more convenience.
  • Enhanced Durability: Improved dust and water resistance.

Apple Watch Series 8

Series 8 continued to build on previous innovations with:

  • Temperature Sensing: Added a new sensor to track body temperature changes.
  • Advanced Health Monitoring: Enhanced features for tracking health metrics and fitness activities.
  • Refined Design: Further improvements in display and durability.

Apple Watch Series 9

The latest model, the Apple Watch Series 9, showcases Apple’s most advanced technology yet:

Dimensions and Weight

  • Height: 45mm
  • Width: 38mm
  • Depth: 10.7mm
  • Weight (Aluminum, GPS Only): 38.7 grams
  • Weight (Aluminum, GPS + Cellular): 39.0 grams
  • Weight (Stainless Steel): 51.5 grams

See Also: What Can You Do With An Apple Watch


The Series 9 features a Retina display with a maximum brightness of 3000 nits, the brightest display designed by Apple. The edge-to-edge design enhances the visual experience, making detailed watch faces look stunning and facilitating easy interaction through clicking, typing, and swiping.

Other Features

  • Fast Charging: Reduces the time needed to charge the watch fully.
  • ECG App: Allows users to take electrocardiograms directly from their wrists.
  • Health Notifications: Includes high and low heart rate notifications, irregular heart rhythm notifications, and low cardiovascular health notifications.
  • Temperature Sensing and Cycle Tracking: Provides advanced health monitoring capabilities.
  • Emergency Features: Emergency SOS and international emergency calling, along with fall detection and collision detection, enhance user safety.
  • Water Resistance: Ensures the watch is durable enough for swimming and other water activities.


From the first-generation 38mm Apple Watch to the advanced Series 9, Apple has consistently pushed the boundaries of what a smartwatch can do. The evolution of the Apple Watch series reflects Apple’s commitment to innovation, design, and user experience. The 38mm Apple Watch, as the pioneer model, laid the groundwork for a series of remarkable devices that continue to set the standard in wearable technology.


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