Compare phones
| Global Score | |
| 11.67 | 9.06 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 10 |
| 2021-01-29 | 2020-06-29 |
| 6.50 x 2.98 x 0.35 inches | 6.61 x 3.02 x 0.32 inches |
| 8.04 ounces | 6.81 ounces |
| Phantom black and Silver | Black |
| Aluminum and Glass (Corning Gorilla Glass Victus) | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 966.00 | $ 194.00 |
| Display / Screen | |
| 6.8 inches | 6.5 inches |
| 3200 x 1440 pixels | 1600 x 720 pixels |
| Dynamic AMOLED | IPS LCD |
| 516 pixels per inch | 270 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 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 |
| 12 GB RAM | 3 GB RAM |
| Adreno 660 GPU | PowerVR GE8320 GPU |
| 9.72 | 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 | |
| 108.00 MP + 40.00 MP | 16.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 24.00mm focal length | -- |
| 0.75 inches (1/1.33") 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 | -- |
| 13.75 | 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 | |
| 5000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 4.96 | 4.64 |
| Other Features | |
| Bluetooth 5.1 | 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 Ultra has an overall score of 11.67, which is a lot better than the Galaxy A21's general score of 9.06. These phones come with Android OS (Operating System), but Galaxy S21 Ultra has the newer 11 version and Galaxy A21 has Android 10 version, so it provides you lots of additional features. Galaxy S21 Ultra is an a little thicker and heavier phone than Galaxy A21.
The Samsung Galaxy S21 Ultra features a bit more powerful CPU than Galaxy A21, and although they both have 8 cpu cores, the Samsung Galaxy S21 Ultra also has 9 GB more RAM memory. The Galaxy S21 Ultra counts with an incredibly better looking display than Galaxy A21, because it has a much higher 1440 x 3200 resolution, a quite larger display and a lot greater display pixels density.
Galaxy S21 Ultra features a slightly better storage capacity to store more apps and games than Samsung Galaxy A21, because although it has no slot for external memory cards, it also counts with 128 GB internal storage. Samsung Galaxy S21 Ultra features just a little bit longer battery performance than Samsung Galaxy A21, because it has a 25% larger battery size.
The Galaxy S21 Ultra shoots way better photos and videos than Samsung Galaxy A21, and although they both have a F1.8 aperture, the Galaxy S21 Ultra also has a back facing camera with much more MP, a much larger sensor which provides a way better photo and video quality and a much higher video quality.
Although Galaxy S21 Ultra is a better device, it is a lot more expensive than Samsung Galaxy A21, and it doesn't have such a good price and quality relation as the Samsung Galaxy A21. If you prefer to save some money, you can buy the Samsung Galaxy A21, and give up a couple features, but you will get the most with your savings.