Compare phones
| Global Score | |
| 91.8 | 76.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 10 |
| 2021-01-29 | 2020-06-29 |
| 5.97 x 2.80 x 0.31 inches | 6.61 x 3.02 x 0.32 inches |
| 6.03 ounces | 6.81 ounces |
| Gray, Phantom pink, Violet and White | Black |
| Aluminum and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 722.00 | $ 194.00 |
| Display / Screen | |
| 6.2 inches | 6.5 inches |
| 2400 x 1080 pixels | 1600 x 720 pixels |
| Dynamic AMOLED | IPS LCD |
| 424 pixels per inch | 270 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Mediatek Helio P35 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 8 GB RAM | 3 GB RAM |
| Adreno 660 GPU | PowerVR GE8320 GPU |
| 9.63 | 9.27 |
| Storage | |
| 128 GB internal memory | 32 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 9.84 |
| Camera | |
| 12.00 MP + 10.00 MP | 16.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.57 inches (1/1.76") sensor | 0.33 inches (1/3.06") sensor |
| 7680 x 4320 (24 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 10.78 | 9.35 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 10.7 | 6.7 |
| 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, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy S21 is much better than Samsung Galaxy A21, getting a global score of 91.8 against 76.1. Galaxy S21's body is a little bit thinner and lighter than Samsung Galaxy A21, although both were released only 7 months apart. Both of these phones include Android operating system, but Galaxy S21 has a newer 11 version while Samsung Galaxy A21 has Android 10, providing some nice extra features.
The Galaxy S21 has a way better screen than Galaxy A21, because although it has a little smaller display, it also counts with a lot higher resolution of 1080 x 2400px and much more pixels per inch in the display. Galaxy S21 counts with a bit more powerful processing unit than Galaxy A21, and although they both have 8 cpu cores, the Galaxy S21 also has more RAM.
Samsung Galaxy S21 counts with a bit more memory capacity for applications, games, photos and videos than Galaxy A21, because although it has no slot for SD memory cards, it also counts with 128 GB internal memory. Galaxy A21 and Samsung Galaxy S21 both feature quite similar batteries performance. Galaxy S21 has a superior camera than Samsung Galaxy A21, because although it has a lot worse 12 MP resolution camera, and they both have a same size aperture, the Galaxy S21 also counts with a lot higher video quality and a lot bigger camera sensor.
Although Galaxy S21 is a better device, it is a lot more expensive than Samsung Galaxy A21, and it doesn't have such a good quality/price relation as Samsung Galaxy A21. If you are trying to save a few dollars, you can buy the Samsung Galaxy A21, giving up a couple features, but you'll get the most with your money.
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