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Global Score
11.678.93
Basic Information
SamsungSamsung
Android 11Android 8.0 Oreo
2021-01-29--
6.50 x 2.98 x 0.35 inches6.04 x 3.04 x 0.32 inches
8.04 ounces6.14 ounces
Phantom black and Silver16 777 216
Aluminum and Glass (Corning Gorilla Glass Victus)Plastic
Scratch-Resistant GlassScratch-Resistant Glass
$ 966.00--
Display / Screen
6.8 inches5.5 inches
3200 x 1440 pixels 1280 x 720 pixels (HD)
Dynamic AMOLED Super AMOLED
516 pixels per inch267 pixels per inch
1500 cd/m2 brightness--
No touch screenNo touch screen
9.87.1
Performance
Qualcomm Snapdragon 888 chipsetSamsung Exynos 7 Octa 7884 chipset
Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processorARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor
12 GB RAM4 GB RAM
Adreno 660 GPUARM Mali-G71 GPU
9.728.82
Storage
128 GB internal memory32 GB internal memory
No SD card slotmicroSDXC (up to 256 GB) external memory slot
10.18.88
Camera
108.00 MP + 40.00 MP13.00 MP + 8.00 MP
f/1.80 aperturef/1.90 aperture
24.00mm focal length27.00mm focal length
0.75 inches (1/1.33") sensor0.33 inches (1/3.06") sensor
7680 x 4320 (24 fps) video resolution1920 x 1080 (30 fps) (Full HD) video resolution
1280 x 720 (960 fps) (HD) slow motion video--
13.759.02
Networks
Wi-FiWi-Fi
Mobile HotspotMobile Hotspot
5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPALTE (4G), HSPA and HSUPA
Nano SIMMicro SIM, Dual SIM
10.76.1
Battery Life
5000mAh Li - Polymer Battery3000mAh Battery
Non-Removable BatteryRemovable Battery
Wireless Charging--
4.964.64
Other Features
Bluetooth 5.1 Bluetooth 5.0
GPSGPS
NFC--
Fingerprint ID ScannerFingerprint ID Scanner
Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity SensorAccelerometer, Light Sensor and Proximity Sensor
FM RadioFM Radio

Comparison review

The Galaxy S21 Ultra is way better than the Samsung Galaxy J7 Duo, having a 11.67 score against 8.93. Both phones we compare here use Android OS (Operating System), but Galaxy S21 Ultra has the previous 11 version and Samsung Galaxy J7 Duo has Android 8.0 Oreo version. Even being the best in this comparison, the Galaxy S21 Ultra is a just a little thicker and much heavier phone than the Samsung Galaxy J7 Duo.

Galaxy S21 Ultra counts with a faster processing unit than Galaxy J7 Duo, and although they both have a Octa-Core processor, the Galaxy S21 Ultra also has more RAM. Galaxy S21 Ultra counts with a much more vibrant display than Samsung Galaxy J7 Duo, because it has much more pixels per inch in the screen, a lot better resolution of 1440 x 3200px and a larger display.

Galaxy S21 Ultra has more storage capacity to store more apps and games than Galaxy J7 Duo, because although it has no external memory slot, it also counts with more internal storage capacity. The Samsung Galaxy S21 Ultra features a bit better battery performance than Galaxy J7 Duo, because it has a 67% greater battery capacity.

Galaxy S21 Ultra takes much clearer photos and videos than Galaxy J7 Duo, because it has a larger aperture to capture better images in low-light environments, a lot higher 7680x4320 video resolution, a back-facing camera with lot more megapixels and a way bigger camera sensor providing a much better image quality.