Compare phones
| Global Score | |
| 79.2 | 77.7 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 10 |
| 2018-01-06 | 2020-06-19 |
| 5.87 x 2.78 x 0.33 inches | 6.44 x 2.96 x 0.35 inches |
| 6.07 ounces | 6.77 ounces |
| Black, Blue, Gold and Orchid grey | Black, Blue, Red and White |
| Aluminum and Glass (Corning Gorilla Glass 5) | -- |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 5.6 inches | 6.5 inches |
| 2220 x 1080 pixels | 1600 x 720 pixels |
| Super AMOLED | TFT |
| 441 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 8.3 | 7.2 |
| Performance | |
| Samsung Exynos 5 Octa 7885 chipset | Samsung Exynos 850 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 2200 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Mali-G71 GPU | Mali-G76 GPU |
| 9.18 | 9.09 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 10.78 | 9.84 |
| Camera | |
| 16.00 MP + 16.00 MP | 48.00 MP + 13.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 9.24 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.3 | 6.7 |
| Battery Life | |
| 3000mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 4.96 | 6.8 |
| 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, Gyroscope and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy A8 (2018) is slightly better than Galaxy A21s, with a global score of 79.2 against 77.7. Although Galaxy A8 (2018) is a lot older than the Galaxy A21s, it's design is just a bit thinner and somewhat lighter. The Samsung Galaxy A8 (2018) features a little bit better processing power than Samsung Galaxy A21s, and although they both have the same number of cores, the Samsung Galaxy A8 (2018) also has a greater amount of RAM memory.
Samsung Galaxy A8 (2018) has a better looking screen than Galaxy A21s, because although it has a little smaller screen, it also counts with a much higher pixels amount per inch of screen and a way better 1080 x 2220 pixels resolution. The Galaxy A21s counts with a superior camera than Galaxy A8 (2018), because although it has a smaller aperture which is worse for low-light images and video, and they both have the same 1920x1080 video definition and the same 30 fps video frame rate, the Galaxy A21s also counts with a much higher 48 MP resolution back facing camera.
Samsung Galaxy A8 (2018) counts with a bit bigger memory capacity to install games and applications than Galaxy A21s, because although it has an external memory card slot that holds a maximum of 256 GB against 512 GB, it also counts with 32 GB more internal storage. Galaxy A21s has a way better battery lifetime than Samsung Galaxy A8 (2018), because it has 5000mAh of battery capacity.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.