Compare phones
| Global Score | |
| 76.1 | 91.8 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 11 |
| 2020-06-29 | 2021-01-29 |
| 6.61 x 3.02 x 0.32 inches | 5.97 x 2.80 x 0.31 inches |
| 6.81 ounces | 6.03 ounces |
| Black | Gray, Phantom pink, Violet and White |
| Plastic and Plastic | Aluminum and Plastic |
| -- | Scratch-Resistant Glass |
| $ 194.00 | $ 722.00 |
| Display / Screen | |
| 6.5 inches | 6.2 inches |
| 1600 x 720 pixels | 2400 x 1080 pixels |
| IPS LCD | Dynamic AMOLED |
| 270 pixels per inch | 424 pixels per inch |
| -- | 1300 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.3 | 9.2 |
| Performance | |
| Mediatek Helio P35 chipset | Qualcomm Snapdragon 888 chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 8 GB RAM |
| PowerVR GE8320 GPU | Adreno 660 GPU |
| 9.27 | 9.63 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 9.84 | 10.1 |
| Camera | |
| 16.00 MP + 13.00 MP | 12.00 MP + 10.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| -- | 26.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.57 inches (1/1.76") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (24 fps) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 9.35 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 6.7 | 10.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.92 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy S21 has a score of 91.8, which is way better than Galaxy A21's 76.1 global score. Both of these phones use Android operating system, but Galaxy S21 has a more recent 11 version and Galaxy A21 has Android 10. The Galaxy S21 is a somewhat lighter and a little thinner phone than the Galaxy A21, although they were released only 7 months apart.
Galaxy S21 features a much more vibrant display than Galaxy A21, because although it has a quite smaller display, it also counts with a way better pixel number per inch in the display and a much better 1080 x 2400 resolution. The Galaxy S21 features a little faster processing unit than Samsung Galaxy A21, and although they both have the same number of cores, the Galaxy S21 also has more RAM.
Galaxy S21 captures better photos and videos than Galaxy A21, because although it has a way less megapixels camera, and they both have a F1.8 aperture, the Galaxy S21 also counts with a lot better 7680x4320 video definition and a much larger sensor providing a much better image quality. Galaxy S21 features a little bit better storage for applications, games, photos and videos than Samsung Galaxy A21, because although it has no external memory card slot, it also counts with more internal memory capacity.
The Galaxy S21's battery duration is just as good as Galaxy A21's battery lifetime.
Although Samsung Galaxy S21 is a better device, it costs a lot more than Samsung Galaxy A21, and it doesn't have such a good relation between it's price and quality as Samsung Galaxy A21. If you want to save a few dollars, you can buy Samsung Galaxy A21, giving up some specs and features, but you'll get the most with your money.
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