Compare phones
| Global Score | |
| 74.2 | 76.1 |
| Basic Information | |
| Asus | Samsung |
| Android 8.0 Oreo, 7.0 Nougat | Android 10 |
| 2017-10-30 | 2020-06-29 |
| 6.12 x 2.96 x 0.30 inches | 6.61 x 3.02 x 0.32 inches |
| 5.82 ounces | 6.81 ounces |
| Black, Green and White | Black |
| Metal | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 399.00 | $ 194.00 |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1920 x 1080 pixels (Full HD) | 1600 x 720 pixels |
| Super IPS+ LCD | IPS LCD |
| 401 pixels per inch | 270 pixels per inch |
| 600 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.6 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 630 chipset | Mediatek Helio P35 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 2200 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Adreno 508 GPU | PowerVR GE8320 GPU |
| 9.18 | 9.27 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 1,95 TB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 14.66 | 9.84 |
| Camera | |
| 12.00 MP + 8.00 MP | 16.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 25.00mm focal length | -- |
| 0.39 inches (1/2.55") sensor | 0.33 inches (1/3.06") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 9.57 | 9.35 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 6.7 | 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 5.0 | 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 | FM Radio |
Comparison review
Samsung Galaxy A21 has a global score of 76.1, which is a little bit better than the Asus ZenFone 4's 74.2 score. Both of these devices use Android OS (operating system), but Samsung Galaxy A21 has older 10 version while Asus ZenFone 4 has Android 8.0 Oreo version. Even though Samsung Galaxy A21 is newer than Asus ZenFone 4, it's heavier and a little bit thicker.
Samsung Galaxy A21 features a little better processing power than Asus ZenFone 4, although it has a lower amount of RAM, they both have 8 cpu cores. Asus ZenFone 4 counts with a better screen than Samsung Galaxy A21, because although it has a little bit smaller screen, it also counts with a greater pixel density and a better 1080 x 1920 resolution.
Asus ZenFone 4 has a much bigger storage capacity for apps and games than Galaxy A21, because it has an external memory card slot that holds up to 1,95 TB and 64 GB internal storage. The Asus ZenFone 4 features just a bit better camera than Galaxy A21, because although it has a much less mega pixels back facing camera, and they both have a same size camera aperture, the Asus ZenFone 4 also counts with a larger sensor capturing more light and vivid colors and a lot higher 3840x2160 video quality.
The Samsung Galaxy A21 features better battery duration than Asus ZenFone 4, because it has 4000mAh of battery capacity against 3300mAh.
Despite of being the best phone between the ones we are comparing, the Galaxy A21 is also very cheap compared to the other devices, making it an easy decision.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.