Compare phones
| Global Score | |
| 73.1 | 81.3 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 8.0 Oreo | Android 10 |
| 2018-07-13 | 2020-04-27 |
| 6.03 x 3.00 x 0.34 inches | 6.27 x 2.88 x 0.34 inches |
| 6.38 ounces | 6.53 ounces |
| Blue | Prism Crush black, Prism Crush blue, Prism Crush red and Prism Crush white |
| -- | Plastic |
| Scratch-Resistant Glass | -- |
| $ 107.00 | -- |
| Display / Screen | |
| 5.5 inches | 6.4 inches |
| 1280 x 720 pixels (HD) | 2400 x 1080 pixels |
| TFT | Super AMOLED |
| 267 pixels per inch | 411 pixels per inch |
| No touch screen | No touch screen |
| 7.1 | 8.1 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | MediaTek Helio P65 MT6768 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 2 GB RAM | 4 GB RAM |
| Mali-T830 MP1 GPU | Mali-G52 MC2 GPU |
| 8.73 | 9.09 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 400 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.44 | 11.74 |
| Camera | |
| 13.00 MP + 13.00 MP | 48.00 MP + 20.00 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 | 10.89 |
| 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, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
Galaxy A31 has a global score of 81.3, which is better than Samsung Galaxy J7 Star's general score of 73.1. The Galaxy A31 is a a little bit heavier cellphone than the Samsung Galaxy J7 Star, but they are 0.34inches thick. Both phones we compare here include Android operating system, but Galaxy A31 has 10 version while Samsung Galaxy J7 Star has Android 9.0 Pie.
Samsung Galaxy A31 features a bit more powerful processor than Galaxy J7 Star, and although they both have the same number of cores, the Samsung Galaxy A31 also has a greater amount of RAM. The Galaxy A31 has a sharper screen than Samsung Galaxy J7 Star, because it has a way better 1080 x 2400px resolution, way more pixels per inch of screen and a bigger screen.
Galaxy A31 counts with a much greater storage capacity for applications and games than Galaxy J7 Star, because it has a SD card slot that admits up to 512 GB and 64 GB internal memory capacity. Samsung Galaxy A31 has a very superior battery lifetime than Galaxy J7 Star, because it has 5000mAh of battery capacity instead of 3300mAh.
The Galaxy A31 takes better photos and videos than Galaxy J7 Star, because although it has a smaller aperture which is not nice for low light photography and video, and they both have the same 30 fps video frame rate and the same 1920x1080 video definition, the Galaxy A31 also counts with a way larger sensor providing a much better image quality and a way more MP back-facing camera.
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