Compare phones
| Global Score | |
| 77.7 | 98.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 11 |
| 2020-06-19 | 2021-01-29 |
| 6.44 x 2.96 x 0.35 inches | 6.50 x 2.98 x 0.35 inches |
| 6.77 ounces | 8.04 ounces |
| Black, Blue, Red and White | Phantom black and Silver |
| -- | Aluminum and Glass (Corning Gorilla Glass Victus) |
| -- | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.5 inches | 6.8 inches |
| 1600 x 720 pixels | 3200 x 1440 pixels |
| TFT | Dynamic AMOLED |
| 270 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.2 | 9.8 |
| Performance | |
| Samsung Exynos 850 chipset | Qualcomm Snapdragon 888 chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 12 GB RAM |
| Mali-G76 GPU | Adreno 660 GPU |
| 9.09 | 9.72 |
| 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 | |
| 48.00 MP + 13.00 MP | 108.00 MP + 40.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | 24.00mm focal length |
| 0.5 inches (1/2") sensor | 0.75 inches (1/1.33") 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 |
| 10.78 | 13.75 |
| 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, Dual SIM | Nano SIM |
| 6.7 | 10.7 |
| 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 5.0 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Samsung Galaxy S21 Ultra has a general score of 98.1, which is way better than Galaxy A21s's 77.7 score. Samsung Galaxy S21 Ultra is a somewhat heavier cellphone than Galaxy A21s, but both of them are 0.35inches thick. Both devices we compare here include Android OS, but the Samsung Galaxy S21 Ultra has newer 11 version while Galaxy A21s has Android 10 version.
Samsung Galaxy S21 Ultra has a bit better processing power than Samsung Galaxy A21s, and although they both have the same number of cores, the Samsung Galaxy S21 Ultra also has a higher amount of RAM. The Samsung Galaxy S21 Ultra counts with a much more vibrant display than Samsung Galaxy A21s, because it has a much better resolution of 1440 x 3200 pixels, a lot better display pixel density and a little bit bigger display.
The Samsung Galaxy S21 Ultra features a bit more memory for apps and games than Galaxy A21s, because although it has no external memory slot, it also counts with more internal storage capacity. Samsung Galaxy S21 Ultra captures a lot better videos and photos than Galaxy A21s, because it has a back facing camera with a lot better resolution, a bigger aperture, a lot larger sensor and a lot higher video quality.
The Samsung Galaxy A21s and the Galaxy S21 Ultra feature extremely similar batteries duration.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.