Compare phones
| Global Score | |
| 73.1 | 85.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 8.0 Oreo | Android 11, 10 |
| 2018-07-13 | 2019-12-27 |
| 6.03 x 3.00 x 0.34 inches | 6.24 x 2.90 x 0.31 inches |
| 6.38 ounces | 6.07 ounces |
| Blue | Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white |
| -- | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 107.00 | $ 282.00 |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1280 x 720 pixels (HD) | 2400 x 1080 pixels |
| TFT | Super AMOLED |
| 267 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 7.1 | 8.1 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | Samsung Exynos 9611 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 2 GB RAM | 4 GB RAM |
| Mali-T830 MP1 GPU | Mali-G72 MP3 GPU |
| 8.73 | 9.27 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 400 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.44 | 14.14 |
| Camera | |
| 13.00 MP + 13.00 MP | 48.00 MP + 32.00 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 | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1280 x 720 (240 fps) (HD) slow motion video |
| 9.13 | 11.55 |
| 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 | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.28 | 5.92 |
| 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 |
| -- | FM Radio |
Comparison review
The Galaxy A51 is much better than Galaxy J7 Star, having a score of 85.5 against 73.1. The Galaxy A51 is a newer device, and it's also a bit lighter and just a little bit thinner than the Galaxy J7 Star. Both of these devices include Android operating system, but Galaxy A51 has the previous 11 version and Galaxy J7 Star has Android 9.0 Pie.
Galaxy A51 features a little better performance than Samsung Galaxy J7 Star, and although they both have a Octa-Core processing unit, the Galaxy A51 also has a higher amount of RAM. The Galaxy A51 has a sharper screen than Samsung Galaxy J7 Star, because it has a bigger screen, a much higher 1080 x 2400px resolution and a way greater number of pixels per inch of screen.
The Galaxy A51 captures a lot better pictures and videos than Samsung Galaxy J7 Star, because although it has a tinier camera aperture, it also counts with a much better resolution back camera, a much bigger back camera sensor shooting much better quality photos and a way better (4K) video resolution.
The Samsung Galaxy A51 has a very superior memory for games and applications than Samsung Galaxy J7 Star, because it has 96 GB more internal storage capacity and an external memory slot that supports a maximum of 512 GB. Galaxy A51 has longer battery lifetime than Samsung Galaxy J7 Star, because it has a 21 percent greater battery capacity.
Although Samsung Galaxy A51 is a better device, it is a lot more expensive than the Galaxy J7 Star, and it doesn't have such a good relation between it's price and quality as Galaxy J7 Star. If you want to save a few dollars, you can get Galaxy J7 Star, letting go a few specs and features, but you will get the most with your budget.
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