In depth comparison and review of Realme C21 and Apple iPhone 15 Pro Max. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | A3106 | |
| Form Factor | Touch | Touch | |
| Height | 165.2 mm | 159.9 mm | Realme C21 has greater height than Apple iPhone 15 Pro Max. |
| Width | 76.4 mm | 76.7 mm | Apple iPhone 15 Pro Max has greater width than Realme C21. |
| Depth | 8.9 mm | 8.25 mm | Apple iPhone 15 Pro Max is narrower than Realme C21. |
| Weight | 190 g | 221 g | Realme C21 is lighter than Realme C21. |
| Body Colour | Cross black | Cross blue | Black titanium | White titanium | Natural titanium | Blue titanium | |
| Body Material | - | Textured matt glass, aerospace-grade titanium | |
| Protection | - | Dustproof, splashproof, waterproof | |
| Waterproof (Water-resistant) | - | Yes | Apple iPhone 15 Pro Max is waterproof. |
| IP rating | - | IEC 60529 IP68 | |
| Repairability Index | - | 7.7 (out of 10) | |
| Connector Type | Micro-USB Headset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM | Nano SIM, Electronic SIM card (e-SIM) | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Display Type | LCD display | OLED display | |
|---|---|---|---|
| Display Technology | LCD | Super Retina XDR Display with ProMotion | |
| Screen Size (Display Size) | 6.5" | 6.7" | Apple iPhone 15 Pro Max has larger screen size than Realme C21. |
| Screen Resolution (Display Resolution) | 1600 x 720 pixels | 2796 x 1290 pixels | Apple iPhone 15 Pro Max has better screen resolution than Realme C21. |
| Display Format | HD+ | - | |
| Pixel Density | - | 460 ppi | |
| Aspect Ratio | 20:9 | - | |
| Max Brightness | 420 cd/m² | 2000 cd/m² | Apple iPhone 15 Pro Max has better display brightness than Realme C21. |
| Contrast Ratio | - | 2000000:1 | |
| HDR | - | Yes | Apple iPhone 15 Pro Max has HDR. |
| HDR Technology | - | HDR10 | |
| Display Enhancement Technology | - | Dolby Vision | |
| Display Refresh Rate | - | 120 Hz | |
| Display Features | Mini-drop display | Always-on display, True Tone display, Wide colour display (P3), Haptic touch, Hybrid Log-Gamma (HLG), Dynamic Island, 1600 nits max brightness (HDR), 2000 nits max brightness (outdoor) | |
| Display Protection (Screen Protector) | - | Fingerprint-resistant oleophobic coating, Ceramic Shield |
| PROCESSOR | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Processor Type (CPU) | MediaTek Helio G35 | Apple A17 Pro | |
|---|---|---|---|
| Clock Speed | 2.3 GHz | - | |
| Processor Core Qty | 8-core | 6-core | Realme C21 has higher processor core quantity than Apple iPhone 15 Pro Max. |
| Graphics System (GPU) | PowerVR GE8320 | - |
| MEMORY | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| RAM | LPDDR4X SDRAM - 3 GB | - | |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 256 GB | Apple iPhone 15 Pro Max has more internal memory than Realme C21. |
| Supported Flash Memory Cards (Expandable Memory) | microSD | - |
| CAMERA | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 3 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 48 Megapixel | Apple iPhone 15 Pro Max has better camera resolution than Realme C21. |
| Lens Aperture | F/2.2 | F/1.78 | Apple iPhone 15 Pro Max has better lens aperture than Realme C21. |
| Lens Construction | 5-element | - | |
| Pixel Size | - | 2.44 μm | |
| Optical Image Stabiliser (OIS) | - | Sensor-shift OIS second-generation (Optical Image Stabilisation) | Apple iPhone 15 Pro Max has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Minimum Focal Length (Focal Distance) | - | 24 mm | |
| Optical Zoom | - | 5x | |
| Digital Zoom | 4x | 25x | Apple iPhone 15 Pro Max has better digital zoom than Realme C21. |
| Special Effects | HDR | Photographic Styles | |
| HDR Mode | - | Smart HDR 5 | |
| Camera Modes | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape | Burst mode, slow motion video, Panorama, Time-lapse mode, night mode, portrait mode, Live Photos, Portrait Lighting, wide colour capture for photos and Live Photos, Cinema mode, Macro video, Macro mode, Time Lapse (Night mode), Apple ProRAW, Night mode portraits, spatial video, log video recording | |
| Face Recognition (Face ID) | - | Face recognition | Apple iPhone 15 Pro Max has face detection. |
| Light Source | LED flash | Adaptive True Tone LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, 3840 x 2160 (4K) at 24 fps, 1920 x 1080 (1080p) at 25 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, 3840 x 2160 (4K) at 25 fps | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost | Sapphire crystal lens cover, Cinematic video stabilisation, Cinematic video stabilisation, Playback zoom, geotagging, Stereo Recording, Continuous autofocus video, 8MP still photos recording 4K video, Time‑lapse video with stabilisation, Advanced red-eye correction, Panorama (up to 63MP), HEIF image capture, Audio zoom, 100% Focus Pixels, QuickTake video, HEVC (High Efficiency Video coding), Deep Fusion, Dolby Vision HDR video recording up to 4K at 60 fps, 2x optical zoom out, Cinematic mode up to 4K HDR at 30 fps, Action mode up to 2.8K at 60 fps, Photonic Engine, customisable default lens, ProRes video recording up to 4K at 60 fps with external recording, Academy Colour Encoding System, 10x optical zoom range, 5x optical zoom in |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 2 Megapixel | 12 Megapixel | Apple iPhone 15 Pro Max has better second camera resolution than Realme C21. |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.4 | F/2.2 | Apple iPhone 15 Pro Max has better second camera lens aperture than Realme C21. |
| Lens Element Qty (2nd Camera) | 3-element | - | |
| Field of View (2nd Camera) | - | 120 degree(s) | |
| Pixel Size (2nd Camera) | - | 1.4 μm | |
| Minimum Focal Length (2nd Camera) | - | 13 mm | |
| Camera Functions (2nd Camera) | B&W lens | - | |
| Camera Features (2nd Camera) | - | Lens correction, 100% Focus Pixels, Quad Pixel sensor |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 2 Megapixel | 12 Megapixel | Apple iPhone 15 Pro Max has higher resolution third camera than Realme C21. |
|---|---|---|---|
| Lens Type (3rd Camera) | - | Telephoto lens | |
| Lens Aperture (3rd Camera) | F/2.4 | F/2.8 | Realme C21 has better third camera lens aperture than Realme C21. |
| Lens Element Qty (3rd Camera) | 3-element | - | |
| Optical Image Stabiliser (OIS) | - | 3D sensor-shift optical image stabilisation (OIS) | Apple iPhone 15 Pro Max has optical stabilisation of the third camera. |
| Minimum Focal Length (3rd Camera) | - | 120 mm | |
| Optical Zoom | - | 5x | |
| Camera Functions (3rd Camera) | Macro camera | - | |
| Camera Features (3rd Camera) | 4cm macro photography | 100% Focus Pixels, Quad Pixel sensor, autofocus for video, tetraprism design |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 5 Megapixel | 12 Megapixel | Apple iPhone 15 Pro Max has better front camera resolution than Realme C21. |
| Lens Aperture (Front) | F/2.2 | F/1.9 | Apple iPhone 15 Pro Max has better front lens aperture than Realme C21. |
| Lens Element Qty (Front) | 3-element | - | |
| Focus Adjustment | - | Automatic | |
| Special Effects (Front) | HDR | Photographic Styles | |
| HDR Mode (Front) | - | Smart HDR 5 | |
| Camera Modes (Front) | Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode | Burst mode, slow motion video, Time-lapse mode, night mode, portrait mode, Live Photos, Portrait Lighting, wide colour capture for photos and Live Photos, Time Lapse (Night mode), Apple ProRAW, log video recording | |
| Face Recognition (Face ID) | Face recognition | Face recognition | Both phones have face detection. |
| Light Source (Front) | - | Retina Flash | |
| Video Resolutions (Front) | - | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, 3840 x 2160 (4K) at 24 fps, 1920 x 1080 (1080p) at 25 fps, 3840 x 2160 (4K) at 25 fps | |
| Camera Features (Front) | - | Auto image stabilisation, Animoji, Memoji, TrueDepth camera, Cinematic video stabilisation, QuickTake video, Time‑lapse video with stabilisation, Lens correction, Deep Fusion, Dolby Vision HDR video recording up to 4K at 60 fps, Autofocus with Focus Pixels, Photonic Engine, Cinematic mode up to 4K HDR at 30 fps, ProRes video recording up to 4K at 60 fps, Academy Colour Encoding System |
| BATTERY AND CHARGING | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | - | |
|---|---|---|---|
| Fast Charging Technology | - | Apple MagSafe wireless charging | Apple iPhone 15 Pro Max has fast charging technology. |
| Wireless Charging | - | Yes | Apple iPhone 15 Pro Max can be charged wirelessly. |
| Wireless Charging Standards | - | Qi | |
| Run Time Details | - | Playback (video): up to 29 hrs Playback (streamed video): up to 25 hrs Playback (audio): up to 95 hrs |
|
| Battery Technology | - | Lithium Ion |
| CELLULAR | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | Apple iPhone 15 Pro Max has more advanced generation mobile network. |
| Operating System | Android 10 | iOS 17 | |
| User Interface | Realme UI | - | |
| Intelligent Assistant | - | Siri | |
| Payment Technology | - | Apple Pay | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC |
| COMMUNICATIONS | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Data Transmission | FDD-LTE, TDD-LTE | EDGE, HSPA+, DC-HSDPA, VoLTE, FDD-LTE, Gigabit LTE, LAA, 5G NR FR1, TD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 5, Band 8 | Band 1, Band 2, Band 5, Band 8, Band 10 | |
| 3G UMTS Frequency | 2100, 850, 900 | 2100, 1900, 850, 900, 1700 EAWS | |
| 4G LTE Band | Band 1, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 30, Band 32, Band 34, Band 38, Band 39, Band 40, Band 41, Band 42, Band 46, Band 48, Band 66, Band 53 | |
| 4G LTE Frequency | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 2300 WCS, FDD 1500 L, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 3500, TDD 5150, TDD 3600, FDD 1700 - 2110 AWS-3, Band 53 | |
| 5G NR Band | - | N1, n2, n3, n5, n7, n8, n20, n28, n38, n41, n66, n70, n77, n78, n79, n40, n25, n12, n48, n26, n30, n14, n53 | |
| 5G NR Frequency | - | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, FDD AWS-4, TDD TD 3700, TDD TD 3500, TDD TD 4500, TDD 2300, FDD 1900, n12, TDD 3500, FDD 850, FDD 2300, n14, n53 | |
| Wireless Interface | IEEE 802.11b/g/n | IEEE 802.11ax, Wi-Fi 6E | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.3 | |
| NFC | - | Yes | Apple iPhone 15 Pro Max has NFC reader for mobile payments. |
| Ultra-Wideband (UWB) | - | Yes | Apple iPhone 15 Pro Max has UWB wireless technology. |
| MEDIA | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Supported Digital Audio Standards | - | AAC, MP3, FLAC, Apple Lossless, Dolby Atmos, Dolby Digital, Dolby Digital Plus | |
|---|---|---|---|
| Supported Digital Video Standards | - | H.264, HEVC, ProRes | |
| Sound Enhancements | - | Dolby Digital Plus sound, Dolby Atmos sound technology, Dolby Digital sound, Spatial audio | |
| Video Enhancements | - | HDR with Dolby Vision, HDR10, Hybrid Log-Gamma (HLG) |
| FEATURES | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, proximity sensor, magnetometer, light sensor | Proximity sensor, digital compass, barometer, magnetometer, LiDAR scanner, dual ambient light sensor, gyroscope with large dynamic range, high-g accelerometer | |
| Security Devices | Fingerprint reader | Face recognition | |
| Security Technology | - | Face ID | |
| Additional Phone Features | Super power saving mode, HyperEngine technology, Reverse charging | MIMO technology, Wi-Fi Calling, iBeacon microlocation, QuickType keyboard, Apple TV support (2nd or later), Fast Charging, FaceTime audio, Apple MagSafe, Express Transit cards with power reserve, 4K HDR AirPlay Mirroring, FaceTime HD (1080p), RTT/TTY compatible, Voice isolation, 16‑core Neural Engine, Wide Spectrum microphone mode, Screen sharing, Portrait mode in FaceTime video, Optical zoom with rear‑facing camera, DisplayPort over USB Type-C, FaceTime call with SharePlay, Crash Detection, magnet array, alignment magnet, accessory identification NFC, Emergency SOS via satellite, thread networking technology, action button, Dual active eSIM support, StandBy, hardware-accelerated ray tracing, MetalFX Upscaling, second-generation Ultra Wideband chip |
| OTHERS | Realme C21 | Apple iPhone 15 Pro Max |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool | USB-C to USB-C cable (1 m) | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland | IEC 60529 IP68, BFR-free, PVC-free, Beryllium-free, Mercury-free, HEARING AID M3/T4, Arsenic-free | |
| EPEAT Compliant | - | Yes | |
| EPEAT Level | - | EPEAT Gold | |
| Carbon Footprint | - | 75 kg carbon emissions | |
| Product Recycled Content | - | 20 % - recycled or renewable content | |
| Max Depth of Water Resistance | - | 6 m | |
| Max Operating Temperature | - | 35 °C | |
| Min Operating Temperature | - | 0 °C | |
| Humidity Range Operating | - | 5 - 95% (non-condensing) |
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