Compare phones
| Global Score | |
| 73.1 | 77.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 8.0 Oreo | Android 10 |
| 2018-07-13 | 2020-06-19 |
| 6.03 x 3.00 x 0.34 inches | 6.44 x 2.96 x 0.35 inches |
| 6.38 ounces | 6.77 ounces |
| Blue | Black, Blue, Red and White |
| Scratch-Resistant Glass | -- |
| $ 107.00 | -- |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1280 x 720 pixels (HD) | 1600 x 720 pixels |
| TFT | TFT |
| 267 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 7.1 | 7.2 |
| Performance | |
| Samsung Exynos 7 Octa 7870 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 |
| 2 GB RAM | 3 GB RAM |
| Mali-T830 MP1 GPU | Mali-G76 GPU |
| 8.73 | 9.09 |
| Storage | |
| 32 GB internal memory | 32 GB internal memory |
| microSDXC (up to 400 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.44 | 9.84 |
| Camera | |
| 13.00 MP + 13.00 MP | 48.00 MP + 13.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 28.00mm 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 |
| 9.13 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 6.6 | 6.7 |
| Battery Life | |
| 3300mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.28 | 6.8 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
Comparison review
The Galaxy A21s has an overall score of 77.7, which is slightly better than the Galaxy J7 Star's 73.1 score. Both phones we are comparing here work with Android OS (operating system), but Galaxy A21s has an older 10 version while Galaxy J7 Star has Android 9.0 Pie. Galaxy A21s is a newer cellphone than Galaxy J7 Star, but it is a little bit heavier and a little bit thicker.
Samsung Galaxy A21s counts with a little better performance than Galaxy J7 Star, and although they both have a Octa-Core processor, the Samsung Galaxy A21s also has a larger amount of RAM. The Samsung Galaxy A21s has a bit sharper screen than Samsung Galaxy J7 Star, because it has a larger screen, a quite better resolution of 720 x 1600 pixels and a just a little more pixels per inch of screen.
Galaxy A21s shoots better pictures and videos than Galaxy J7 Star, because although it has a smaller aperture which is worse for low-light images, and they both have the same (Full HD) video resolution and the same video frame rate, the Galaxy A21s also counts with a much higher 48 mega pixels resolution camera and a lot bigger sensor which offers a much better photo and video quality.
The Samsung Galaxy A21s features slightly more storage to install games and applications than Samsung Galaxy J7 Star, and although they both have exactly the same 32 GB internal storage capacity, the Samsung Galaxy A21s also has a slot for SD memory cards that allows a maximum of 512 GB. Samsung Galaxy A21s counts with a really longer battery life than Samsung Galaxy J7 Star, because it has a 52% more battery capacity.
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