Galaxy S21 Ultra 5G Vs iPhone 16 Plus

The Samsung Galaxy S21 Ultra 5G, released in January 2021, and the Apple iPhone 16 Plus, launched in September 2024, represent different generations of flagship smartphones from their respective manufacturers. While both offer premium experiences, they cater to distinct user preferences through their operating systems and hardware philosophies. The Galaxy S21 Ultra runs on Android, offering extensive customization, whereas the iPhone 16 Plus operates on Apple's iOS, known for its streamlined ecosystem. Key differentiators lie in their camera systems, display technologies, and overall software longevity.

The lifespan of a smartphone is often determined by its physical durability and the duration of software support it receives. These two devices, released years apart, offer different expectations in this regard.

• Software Longevity: The Galaxy S21 Ultra 5G, having launched with Android 11, received its final major OS update to Android 15 (One UI 7) in May 2025, with security updates concluding in February 2026. [27, 40, 43] In contrast, the iPhone 16 Plus, released with iOS 18, benefits from Apple's typically longer software support cycle, extending its functional lifespan for several more years. [3, 4, 13]
• Physical Durability: Both devices feature an IP68 rating for dust and water resistance, indicating protection against immersion in water up to 6 meters for 30 minutes. [3, 10, 14, 38] The iPhone 16 Plus incorporates Ceramic Shield on its front, designed for enhanced drop performance, while the Galaxy S21 Ultra utilizes Gorilla Glass Victus for its display and back panel. [3, 14, 38]
• Repairability: While specific repairability scores can vary, both devices are designed with modern smartphone construction, meaning professional repair is generally recommended for significant damage. Users seeking to extend the life of their device beyond its initial purchase can consider quality-assured refurbished options, which often come with warranties.

Performance is crucial for daily tasks, from browsing to demanding applications. These devices approach processing power and efficiency from different platforms.

• System Responsiveness: The Galaxy S21 Ultra 5G, powered by a high-end processor from its era, delivers smooth performance for multitasking and running various applications. [31] The iPhone 16 Plus, featuring a more recent Apple-designed chip, offers robust performance, handling demanding apps and multitasking with efficiency. [3, 4, 7, 20]
• Multitasking and Storage: The Galaxy S21 Ultra was available with up to 16GB of RAM, providing ample capacity for heavy multitasking and keeping many applications open simultaneously. [19, 28, 38] The iPhone 16 Plus comes with 8GB of RAM, which, combined with iOS's memory management, ensures a fluid user experience even with multiple apps running. [3, 4, 20] Both devices offer storage options up to 512GB, catering to users with large media libraries or extensive app collections. [3, 7, 10, 12, 14, 19, 28, 38]
• Battery Behavior: The Galaxy S21 Ultra 5G is equipped with a 5000 mAh battery, providing reliable all-day power for most users, with some reporting over 7 hours of screen-on time. [10, 15, 18, 19, 24, 28, 31, 39] The iPhone 16 Plus, with its 4674 mAh battery, is noted for its exceptional battery life, often extending into a second day for many users, and offering up to 27 hours of video playback. [1, 3, 6, 8, 17, 22, 23, 30, 32, 33, 35]

The display is a primary interface for any smartphone, and both models offer large, vibrant viewing experiences with distinct characteristics.

• Display Technology and Clarity: The Galaxy S21 Ultra 5G features a 6.8-inch Dynamic AMOLED 2X display with a resolution of 3200 x 1440 pixels, resulting in a sharp 515 pixels per inch (PPI). [10, 19, 28, 38] The iPhone 16 Plus sports a 6.7-inch Super Retina XDR OLED display with a resolution of 2796 x 1290 pixels, yielding approximately 460 PPI. [2, 3, 4, 12, 16, 20] Both technologies deliver deep blacks and vibrant colors, suitable for media consumption and detailed work.
• Brightness and Refresh Rate: The Galaxy S21 Ultra offers an adaptive refresh rate up to 120Hz, providing smoother scrolling and more fluid animations, alongside HDR10+ support. [10, 19, 28, 38] The iPhone 16 Plus features a 60Hz refresh rate, which is consistent for everyday use, and boasts a peak outdoor brightness of 2000 nits, ensuring excellent visibility even in bright sunlight. [2, 3, 6, 16, 20] The Galaxy S21 Ultra also offers high peak brightness for outdoor viewing. [20]
• Viewing Experience: Both devices provide expansive screens ideal for content consumption, gaming, and productivity. The slightly larger and higher-resolution display of the S21 Ultra offers a marginally more detailed canvas, while the iPhone 16 Plus's high peak brightness enhances outdoor usability.

Camera capabilities are a significant factor for many users, and both smartphones offer advanced systems designed for various photographic scenarios.

• Rear Camera Systems: The Galaxy S21 Ultra 5G features a versatile quad-camera setup, including a 108MP main sensor, a 12MP ultrawide lens, a 10MP telephoto lens with 3x optical zoom, and a 10MP periscope telephoto lens offering 10x optical zoom. [10, 19, 28, 29, 38] This allows for significant zoom capabilities, including a 100x digital 'Space Zoom'. [10, 19, 28, 39] The iPhone 16 Plus comes with an advanced dual-camera system, featuring a 48MP main sensor that uses pixel binning to produce detailed 24MP photos and can achieve 2x telephoto through a sensor crop. It also includes a 12MP ultrawide camera that supports macro photography. [2, 3, 7, 9, 12, 16]
• Photography Performance: The Galaxy S21 Ultra is praised for its detailed photos and impressive dynamic range, with its laser autofocus addressing previous generation issues. [28] The iPhone 16 Plus delivers sharp, noise-free photos with rich detail and natural colors across various lighting conditions, benefiting from Apple's Photonic Engine and Deep Fusion processing. [1, 2, 9, 34] Users appreciate the new Camera Control button and Photographic Styles on the iPhone 16 Plus for more creative input. [9, 25, 34]
• Video Recording and Audio: Both phones offer high-quality video recording. The Galaxy S21 Ultra can record up to 8K at 24fps and 4K at 60fps. [29, 38] The iPhone 16 Plus records 4K video at up to 60fps and introduces spatial video capture. [14, 16, 34] Both provide good microphone quality for calls and recording, and stereo speakers for media consumption. [14, 37]