Compare phones
| Global Score | |
| 73.1 | 76.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 8.0 Oreo | Android 10 |
| 2018-07-13 | 2020-06-29 |
| 6.03 x 3.00 x 0.34 inches | 6.61 x 3.02 x 0.32 inches |
| 6.38 ounces | 6.81 ounces |
| Blue | Black |
| -- | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 107.00 | $ 194.00 |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1280 x 720 pixels (HD) | 1600 x 720 pixels |
| TFT | IPS LCD |
| 267 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 7.1 | 7.3 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | Mediatek Helio P35 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 2 GB RAM | 3 GB RAM |
| Mali-T830 MP1 GPU | PowerVR GE8320 GPU |
| 8.73 | 9.27 |
| 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 | 16.00 MP + 13.00 MP |
| f/1.70 aperture | f/1.80 aperture |
| 28.00mm focal length | -- |
| 0.33 inches (1/3.06") sensor | 0.33 inches (1/3.06") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 9.13 | 9.35 |
| 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 |
| 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 A21 is a bit better than Samsung Galaxy J7 Star, with a 76.1 score against 73.1. Both of these phones include Android operating system, but Galaxy A21 has an older 10 version and Samsung Galaxy J7 Star has Android 9.0 Pie version. Galaxy A21 is a newer and just a little thinner cellphone than the Samsung Galaxy J7 Star, but it's also just a little heavier.
Galaxy A21 counts with a little more vivid display than Samsung Galaxy J7 Star, because it has a quite better 720 x 1600 resolution, a little higher pixels density and a bigger screen. Galaxy A21 features a little faster CPU than Samsung Galaxy J7 Star, and although they both have the same number of cores, the Galaxy A21 also has more RAM memory.
Samsung Galaxy A21 counts with just a bit more storage capacity for applications and games than Samsung Galaxy J7 Star, and although they both have exactly the same internal storage capacity, the Samsung Galaxy A21 also has a SD extension slot that holds a maximum of 512 GB. Samsung Galaxy A21 has improved battery performance than Samsung Galaxy J7 Star, because it has 4000mAh of battery capacity.
Galaxy A21 takes clearer pictures and videos than Galaxy J7 Star, because although it has a smaller camera aperture which is not nice for shooting images and/or video in poorly lited environments, and they both have a 0.33 inches back-facing camera sensor, the same (Full HD) video quality and the same 30 frames per second video frame rates, the Galaxy A21 also counts with a camera in the back with more megapixels.
Although Galaxy A21 is a better device, it costs a lot more than the Galaxy J7 Star, and it doesn't have such a good quality/price relation as Galaxy J7 Star. So if you need that extra specs, you can buy Galaxy A21, but if you don't you can save some dollars and buy the Galaxy J7 Star, letting go some specifications.
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