Compare phones
| Global Score | |
| 73.1 | 98.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 8.0 Oreo | Android 11 |
| 2018-07-13 | 2021-01-29 |
| 6.03 x 3.00 x 0.34 inches | 6.50 x 2.98 x 0.35 inches |
| 6.38 ounces | 8.04 ounces |
| Blue | Phantom black and Silver |
| -- | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 107.00 | $ 966.00 |
| Display / Screen | |
| 5.5 inches | 6.8 inches |
| 1280 x 720 pixels (HD) | 3200 x 1440 pixels |
| TFT | Dynamic AMOLED |
| 267 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.1 | 9.8 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | Qualcomm Snapdragon 888 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 2 GB RAM | 12 GB RAM |
| Mali-T830 MP1 GPU | Adreno 660 GPU |
| 8.73 | 9.72 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 400 GB) external memory slot | No SD card slot |
| 9.44 | 10.1 |
| Camera | |
| 13.00 MP + 13.00 MP | 108.00 MP + 40.00 MP |
| f/1.70 aperture | f/1.80 aperture |
| 28.00mm focal length | 24.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.75 inches (1/1.33") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (24 fps) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 9.13 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 6.6 | 10.7 |
| Battery Life | |
| 3300mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.28 | 6.8 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Samsung Galaxy S21 Ultra is way better than Galaxy J7 Star, getting a 98.1 score against 73.1. Both devices in this review have Android OS, but the Samsung Galaxy S21 Ultra has 11 version while Galaxy J7 Star has Android 9.0 Pie. Samsung Galaxy S21 Ultra is a noticeably newer device than Galaxy J7 Star, although it is heavier and just a bit thicker.
The Samsung Galaxy S21 Ultra counts with a lot better looking display than Galaxy J7 Star, because it has a much better pixels quantity per inch of screen, a way higher 1440 x 3200 resolution and a larger screen. The Galaxy S21 Ultra has a superior hardware performance than Galaxy J7 Star, and although they both have the same number of cores, the Galaxy S21 Ultra also has 10 GB more RAM.
The Galaxy S21 Ultra counts with slightly more memory for applications, games, photos and videos than Galaxy J7 Star, because although it has no slot for external memory cards, it also counts with 128 GB internal storage. The Galaxy S21 Ultra captures much clearer pictures and videos than Galaxy J7 Star, because although it has a smaller aperture which is not recommended for low-light photography and videos, it also counts with a lot bigger back-facing camera sensor taking way higher quality videos and photographs, a way more megapixels back camera and a lot higher video resolution.
Samsung Galaxy S21 Ultra features a much longer battery lifetime than Samsung Galaxy J7 Star, because it has a 52 percent greater battery capacity.
Although Galaxy S21 Ultra is a better device, it costs a lot more than Galaxy J7 Star, and it doesn't have such a good quality/price relation as the Galaxy J7 Star. If you are trying to save a few dollars, you can get Galaxy J7 Star, giving up a few specs and features, but you will get the most with your savings.
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