Compare phones
| Global Score | |
| 76 | 76.1 |
| Basic Information | |
| OnePlus | Samsung |
| Android 11 | Android 10 |
| 2021-04-02 | 2020-06-29 |
| 6.30 x 2.92 x 0.34 inches | 6.61 x 3.02 x 0.32 inches |
| 6.77 ounces | 6.81 ounces |
| Arctic Sky, Astral Black and Winter Mist | Black |
| Aluminum and Glass (Corning Gorilla Glass) | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 700.00 | $ 194.00 |
| Display / Screen | |
| 6.5 inches | 6.5 inches |
| 2400 x 1080 pixels | 1600 x 720 pixels |
| AMOLED | IPS LCD |
| 405 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 8.2 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Mediatek Helio P35 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 8 GB RAM | 3 GB RAM |
| Adreno 660 GPU | PowerVR GE8320 GPU |
| 9.63 | 9.27 |
| Storage | |
| 128 GB internal memory | 32 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 9.84 |
| Camera | |
| 48.00 MP + 16.00 MP | 16.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 23.00mm focal length | -- |
| 0.71 inches (1/1.4") sensor | 0.33 inches (1/3.06") sensor |
| 7680 x 4320 (30 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (480 fps) (HD) slow motion video | -- |
| 12.65 | 9.35 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 4500mAh Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.32 | 5.92 |
| Other Features | |
| Bluetooth 5.2 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy A21 is slightly better than the OnePlus 9, with a global score of 76.1 against 76. Even though Galaxy A21 is older and a bit heavier than OnePlus 9, it's construction is still a bit thinner. Both of these devices include Android OS (Operating System), but the Galaxy A21 has an older 10 version while OnePlus 9 has Android 11 version.
The OnePlus 9 features a little bit better hardware performance than Galaxy A21, and although they both have the same number of cores, the OnePlus 9 also has more RAM. OnePlus 9 has a better screen than Samsung Galaxy A21, and although they both have a display of the same size, the OnePlus 9 also has more pixels per display inch and a much better resolution of 1080 x 2400.
OnePlus 9 counts with a way better camera than Galaxy A21, and although they both have a F1.8 camera aperture, the OnePlus 9 also has a lot higher 7680x4320 video definition, a much larger back camera sensor which provides a way higher image and video quality and a lot better 48 mega-pixels resolution camera.
OnePlus 9 counts with just a bit more storage capacity for apps and games than Samsung Galaxy A21, because although it has no slot for an external memory card, it also counts with 128 GB internal storage capacity. The OnePlus 9 has a bit better battery duration than Galaxy A21, because it has a 4500mAh battery size against 4000mAh.
Even being the best phone in this comparison, the Galaxy A21 is also by far the cheapest, making this phone a great choice.
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