Compare phones
| Global Score | |
| 74.6 | 77.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 8.0 Oreo | Android 10 |
| -- | 2020-06-19 |
| 6.04 x 3.04 x 0.32 inches | 6.44 x 2.96 x 0.35 inches |
| 6.14 ounces | 6.77 ounces |
| 16 777 216 | Black, Blue, Red and White |
| Plastic | -- |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1280 x 720 pixels (HD) | 1600 x 720 pixels |
| Super AMOLED | TFT |
| 267 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 7.1 | 7.2 |
| Performance | |
| Samsung Exynos 7 Octa 7884 chipset | Samsung Exynos 850 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| ARM Mali-G71 GPU | Mali-G76 GPU |
| 8.82 | 9.09 |
| Storage | |
| 32 GB internal memory | 32 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.88 | 9.84 |
| Camera | |
| 13.00 MP + 8.00 MP | 48.00 MP + 13.00 MP |
| f/1.90 aperture | f/2.00 aperture |
| 27.00mm focal length | 26.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 9.02 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.1 | 6.7 |
| Battery Life | |
| 3000mAh Battery | 5000mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| 4.96 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy A21s is slightly better than Galaxy J7 Duo, having a 77.7 score against 74.6. The Galaxy A21s design is a little bit thicker and a little bit heavier than the Galaxy J7 Duo. These phones use Android operating system, but Galaxy A21s has older 10 version while Galaxy J7 Duo has Android 8.0 Oreo.
Galaxy A21s counts with a bit better looking display than Samsung Galaxy J7 Duo, because it has a bigger screen, a little bit more pixels per screen inch and a quite better 720 x 1600 pixels resolution. Samsung Galaxy A21s features a little faster CPU than Galaxy J7 Duo, although it has a smaller amount of RAM memory, they both have a Octa-Core CPU.
Samsung Galaxy A21s has a much better camera than Galaxy J7 Duo, because although it has a smaller aperture which is not nice for taking photographs or video in low-light situations, and they both have the same 30 frames per second video frame rate and the same video definition, the Samsung Galaxy A21s also counts with a camera in the back with way more MP and a much larger back camera sensor taking lot better quality pictures and videos.
The Samsung Galaxy A21s counts with a quite bigger memory capacity to store more games and applications than Galaxy J7 Duo, and although they both have the same 32 GB internal storage capacity, the Samsung Galaxy A21s also has a slot for SD memory cards that admits a maximum of 512 GB. The Galaxy A21s features a much better battery lifetime than Galaxy J7 Duo, because it has 5000mAh of battery capacity against 3000mAh.
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