Galaxy S21+ 5G vs iPhone 15 Pro Max

The age difference between these two devices significantly impacts their expected longevity and software support. The Samsung Galaxy S21 Plus 5G, released in January 2021, received its final major Android OS update to Android 15 in May 2025, with security updates ceasing in February 2026. The iPhone 15 Pro Max, launched in September 2023 with iOS 17, is guaranteed a minimum of five years of software support from its release date, extending until at least September 2028, with Apple historically providing longer OS and security updates.

• Software Longevity: The iPhone 15 Pro Max offers a considerably longer period of guaranteed software and security updates.
• Physical Resilience: Both devices carry an IP68 rating. The Galaxy S21 Plus 5G uses Gorilla Glass Victus, while the iPhone 15 Pro Max features Ceramic Shield on the front and a titanium frame.
• Repairability: The iPhone 15 Pro Max has been noted for improved repairability compared to older iPhone models, potentially reducing repair costs.

The performance capabilities of the Galaxy S21 Plus 5G and the iPhone 15 Pro Max reflect their respective release timelines and underlying architectures. The Galaxy S21 Plus 5G handles everyday tasks and most demanding applications smoothly. The iPhone 15 Pro Max, featuring a more recent and advanced mobile processor, delivers exceptional performance, particularly noticeable in graphically intensive games and complex video editing.

• Processing Power: The iPhone 15 Pro Max offers a significant advantage in raw processing power, resulting in faster app loading and superior handling of highly demanding applications.
• Multitasking and Responsiveness: Both devices offer 8GB of RAM, enabling efficient multitasking. The iPhone 15 Pro Max's optimized software and powerful processor contribute to a consistently responsive user experience.
• Storage Options: The Galaxy S21 Plus 5G offers 128GB or 256GB of internal storage. The iPhone 15 Pro Max provides larger options, from 256GB to 1TB. Neither device supports expandable storage.

Both the Galaxy S21 Plus 5G and the iPhone 15 Pro Max feature large, vibrant displays, differing in technology and specific capabilities. The Galaxy S21 Plus 5G sports a 6.7-inch Dynamic AMOLED 2X display with a 1080 x 2400 resolution and an adaptive 120Hz refresh rate. The iPhone 15 Pro Max also has a 6.7-inch display, an LTPO Super Retina XDR OLED panel with a higher 1290 x 2796 resolution and a 120Hz ProMotion adaptive refresh rate.

• Display Technology and Clarity: Both utilize OLED technology for rich colors. The iPhone 15 Pro Max offers a higher resolution, providing slightly sharper visuals.
• Brightness and Refresh Rate: The iPhone 15 Pro Max achieves higher peak brightness for outdoor use and HDR content. Both feature adaptive 120Hz refresh rates for smooth visuals, with the iPhone's LTPO technology offering broader adaptability.
• Viewing Experience: The iPhone 15 Pro Max includes the Dynamic Island, an interactive area around the front camera, which integrates alerts and activities.

The camera systems on the Galaxy S21 Plus 5G and the iPhone 15 Pro Max offer distinct approaches to mobile photography and videography. The Galaxy S21 Plus 5G features a triple-camera setup with a 12MP main, 12MP ultrawide, and 64MP telephoto (3x hybrid optical zoom). The iPhone 15 Pro Max boasts a more advanced Pro camera system, including a 48MP main, 12MP ultrawide, and 12MP telephoto with 5x optical zoom.

• Photography Performance: Both excel in everyday photography. The iPhone 15 Pro Max generally offers superior detail and low-light performance, with its 5x optical zoom providing greater reach.
• Video Capabilities: Both record high-quality video. The iPhone 15 Pro Max includes advanced features like ProRes video and improved Cinematic mode for more professional videography.
• Front Camera and Audio: Both have capable front cameras. The iPhone 15 Pro Max's TrueDepth camera enables Face ID. Both offer stereo speakers, with the iPhone often providing a more balanced audio experience.

Beyond core features, several practical elements differentiate the Galaxy S21 Plus 5G and the iPhone 15 Pro Max, influencing daily usability and connectivity.

• Connectivity Standards: Both devices support 5G. The Galaxy S21 Plus 5G features Wi-Fi 6 and Bluetooth 5.0/5.2. The iPhone 15 Pro Max supports newer standards like Wi-Fi 6E and Bluetooth 5.3, offering potentially faster and more stable wireless connections.
• Charging Port and Biometrics: Both utilize a USB-C port. The Galaxy S21 Plus 5G uses an under-display fingerprint sensor, while the iPhone 15 Pro Max relies on Face ID. Neither device includes a traditional headphone jack.
• Design and Handling: The Galaxy S21 Plus 5G (200-202g) features an aluminum frame and glass back. The iPhone 15 Pro Max (221g) utilizes a lightweight titanium frame and introduces a customizable Action Button.