Galaxy S21 5G vs iPhone 15 Pro Max

The Samsung Galaxy S21 5G, released in early 2021, and the Apple iPhone 15 Pro Max, launched in late 2023, represent different generations of flagship smartphones from their respective manufacturers. While both devices offer premium experiences, they cater to distinct preferences through their operating systems and hardware philosophies. The iPhone 15 Pro Max, being a more recent release, incorporates advancements in processing power, camera technology, and display capabilities, setting it apart from the Galaxy S21 5G.

The expected practical lifespan of a smartphone is influenced by its initial release date, the duration of software support, and its repairability.

• Release Timeline: The Galaxy S21 5G was unveiled in January 2021 and released later that month, making it a device from an earlier generation. The iPhone 15 Pro Max, on the other hand, was announced in September 2023 and became available shortly after, positioning it as a much newer device.
• Software Longevity: Samsung committed to providing four generations of Android OS updates and five years of security updates for the Galaxy S21 series. It has already received Android 14 (One UI 6) and is expected to receive Android 15 (One UI 7) in May 2025, extending its software relevance. Apple typically offers a longer period of iOS support, often extending to five or six years or more from the device's release, meaning the iPhone 15 Pro Max will likely receive software updates for a considerably longer duration than the Galaxy S21 5G.
• Repairability: The Galaxy S21 5G initially received a repairability score of 7.5 out of 10 from some assessments, noting its ease of disassembly and replaceable parts, though the battery can be challenging to remove due to strong adhesive. The iPhone 15 Pro Max initially received a lower repairability score of 4 out of 10 from iFixit, partly due to software locks and difficulties with battery removal. However, its score was later promoted to 7 out of 10 due to software updates that facilitate part calibration, improving its repairability within Apple's ecosystem.

Performance in smartphones is determined by the underlying hardware and its optimization for daily tasks, app usage, and demanding applications.

• Processor Capabilities: The Galaxy S21 5G is powered by a capable processor for its generation, enabling smooth operation for everyday tasks and most applications. The iPhone 15 Pro Max features a significantly newer and more advanced processor, which provides a substantial boost in overall speed and efficiency. This translates to faster app loading, more fluid multitasking, and the ability to handle graphically intensive games and professional applications with greater ease.
• System Responsiveness: Users of the iPhone 15 Pro Max will experience a highly responsive interface, with quick transitions and minimal lag, even under heavy load. While the Galaxy S21 5G offers a generally smooth experience, the newer iPhone's processing power provides a noticeable difference in sustained performance and responsiveness, particularly for power users.
• Battery Behavior: The Galaxy S21 5G is equipped with a 4000 mAh battery, which in testing provided around 1.5 days of use with a 120Hz display refresh rate, though some users reported average or disappointing battery life, especially with consistent 120Hz usage. The iPhone 15 Pro Max has a 4422 mAh battery and is noted for its excellent battery life, often lasting through a full day of heavy use and performing well in extended tests, placing it among devices with the longest battery endurance.

The display is a primary interface for smartphone interaction, and both devices offer high-quality viewing experiences with distinct characteristics.

• Display Technology and Clarity: The Galaxy S21 5G features a 6.2-inch Dynamic AMOLED 2X display with a resolution of 1080 x 2400 pixels, resulting in a pixel density of 421 ppi. This provides vibrant colors and good clarity for general use. The iPhone 15 Pro Max boasts a larger 6.7-inch Super Retina XDR OLED display with a higher resolution of 2796 x 1290 pixels and a pixel density of 460 ppi, offering sharper details and deeper blacks.
• Brightness and Refresh Rate: Both phones feature a 120Hz refresh rate for smooth scrolling and animations. The Galaxy S21 5G can reach a peak brightness of 1300 nits, which is suitable for outdoor visibility. The iPhone 15 Pro Max surpasses this with a typical brightness of 1000 nits, a peak HDR brightness of 1600 nits, and an impressive peak outdoor brightness of 2000 nits, ensuring superior readability in bright sunlight. The iPhone 15 Pro Max also includes ProMotion technology, allowing the refresh rate to adapt dynamically, and an Always-On display feature.
• Viewing Experience: The larger screen size of the iPhone 15 Pro Max provides a more expansive viewing area, which can enhance media consumption and productivity tasks. The iPhone also includes the Dynamic Island, an interactive area around the front camera cutout that displays alerts and background activities.

Both smartphones offer advanced camera systems, but the newer iPhone 15 Pro Max incorporates more recent technological advancements.

• Camera System Capabilities: The Galaxy S21 5G features a versatile triple-camera setup with a 12MP wide lens, a 64MP telephoto lens offering 3x hybrid zoom, and a 12MP ultrawide lens. The iPhone 15 Pro Max comes with a more advanced 'Pro camera system' including a 48MP main sensor, a 12MP ultrawide lens, and a 12MP 5x telephoto lens with a unique tetraprism design for extended optical zoom. Both main and zoom cameras on the S21 have optical image stabilization, while the iPhone 15 Pro Max features second-generation sensor-shift optical image stabilization on its main camera and 3D sensor-shift OIS on its telephoto lens.
• Photography Performance: The iPhone 15 Pro Max excels in low-light conditions and offers enhanced portrait mode capabilities, capturing depth data automatically. Its 48MP main camera can output detailed 24MP photos by default, combining information from multiple pixels. The Galaxy S21 5G provides good everyday photography, with its 64MP telephoto lens capable of capturing detailed zoomed shots.
• Video Recording Quality: The Galaxy S21 5G supports 8K video recording at 30 frames per second. The iPhone 15 Pro Max offers 4K video recording at up to 60 frames per second, along with advanced features like Cinematic mode, Action mode, ProRes video recording, Log video recording, and the ability to record spatial video. These features provide more creative control and higher quality output for videographers.
• Audio Experience: While specific microphone and speaker quality details were not extensively detailed for both, newer flagship devices like the iPhone 15 Pro Max generally offer improved microphone clarity for calls and video recording, and enhanced stereo speaker output for media consumption. The Galaxy S21 also features stereo speakers.