Compare phones
| Global Score | |
| 98.1 | 77.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 10 |
| 2021-01-29 | 2020-06-19 |
| 6.50 x 2.98 x 0.35 inches | 6.44 x 2.96 x 0.35 inches |
| 8.04 ounces | 6.77 ounces |
| Phantom black and Silver | Black, Blue, Red and White |
| Aluminum and Glass (Corning Gorilla Glass Victus) | -- |
| Scratch-Resistant Glass | -- |
| $ 966.00 | -- |
| Display / Screen | |
| 6.8 inches | 6.5 inches |
| 3200 x 1440 pixels | 1600 x 720 pixels |
| Dynamic AMOLED | TFT |
| 516 pixels per inch | 270 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Samsung Exynos 850 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 12 GB RAM | 3 GB RAM |
| Adreno 660 GPU | Mali-G76 GPU |
| 9.72 | 9.09 |
| 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 | 48.00 MP + 13.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 24.00mm focal length | 26.00mm focal length |
| 0.75 inches (1/1.33") sensor | 0.5 inches (1/2") 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 | 10.78 |
| 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, Dual SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 6.8 |
| 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, Gyroscope and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Samsung Galaxy S21 Ultra is way better than the Galaxy A21s, having a 98.1 score against 77.7. Both of these phones use Android OS, but the Samsung Galaxy S21 Ultra has a newer 11 version and Galaxy A21s has Android 10. The Samsung Galaxy S21 Ultra is a somewhat heavier cellphone than Galaxy A21s, but both of them have the same thickness.
Samsung Galaxy S21 Ultra counts with a much better looking display than Samsung Galaxy A21s, because it has a quite larger display, a much better pixels amount per screen inch and a way better resolution of 1440 x 3200. The Galaxy S21 Ultra has just a bit better performance than Galaxy A21s, and although they both have 8 cpu cores, the Galaxy S21 Ultra also has a larger amount of RAM memory.
Galaxy S21 Ultra takes much better photos and videos than Galaxy A21s, because it has a way higher 7680x4320 video quality, a larger diafragm aperture for better low light captures and videos, a camera with much more mega-pixels and a way larger sensor capturing lot higher quality pictures. Galaxy S21 Ultra has a slightly better storage capacity for applications and games than Samsung Galaxy A21s, because although it has no SD memory card expansion slot, it also counts with 128 GB internal memory.
Samsung Galaxy A21s's battery life is just as good as the battery lifetime in Galaxy S21 Ultra.
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