vs
BLU D440
Oppo A57
Top 87%756 points
Top 87%
Top 56%2,481 points
Top 56%
BLU D440
Oppo A57
Top specs and features

BLU D440 vs Oppo A57: 83 facts in comparison

1. battery power

1.61x more battery power.
1800mAh
Energizer Power Max P16K Pro: 16000mAh
2900mAh

2. total clock speed

1.87x faster CPU clock speed.
4 x 1.5GHz
Meizu Pro 7 Plus 64GB: 10 x 2.6GHz
8 x 1.4GHz(Qualcomm Snapdragon 435 MSM8940)

3. pixel density

15.27% higher pixel density.
245ppi
Sony Xperia H8541: 847ppi
282.4ppi

4. screen size

The bigger the screen size is, the better the user experience.
4.5"
Samsung Galaxy J Max: 7"
5.2"

5. RAM

2GB more RAM memory.
1GB
Vivo NEX S: 8GB
3GB

6. megapixels

2.6x more megapixels (main camera).
5MP
Huawei Mate RS Porsche Design: 40 & 20 & 8MP
13MP

7. resolution

1.78x higher resolution.
540 x 960px
Sony Xperia H8541: 2160 x 4320px
1280 x 720px

8. front camera megapixels

12.31x more megapixels (front camera).
1.3MP
Wiko View2 Pro: 16 & 16MP
16MP

9. has an external memory slot

The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.
BLU D440
Oppo A57
85% have it

10. weight

2g lighter.
145g
Samsung Galaxy J8: 0g
147g

11. every pixel has three subpixels

The device has a display with three full subpixels per pixel, resulting in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.
BLU D440
Oppo A57
77% have it

12. thickness

3.2mm thinner.
10.8mm
Asus Zenfone AR 64GB: 4.6mm
7.6mm

13. internal storage

28GB more internal storage.
4GB
Smartisan Nut R1: 1024GB
32GB

14. has a removable battery

The battery is removable and can be replaced by the user if broken.
BLU D440
Oppo A57
38% have it

15. has USB mass storage support

It can transfer files, music, photos via USB, no need to install additional software.
BLU D440
Oppo A57
86% have it

16. download speed

7.14x faster downloads.
21MBits/s
Coolpad Cool Play 6: 1500MBits/s
150MBits/s

17. has a radio

It works as an FM radio with included headsets
BLU D440
Oppo A57
67% have it

18. video recording (main camera)

The maximum resolution available for videos shot with the main camera. Although it may be possible to choose among other frame rates, those recordings usually have lower resolutions.
1080 x 30fps
Xiaomi Mi 8 64GB: 2160 x 60fps
1080 x 30fps

19. has NFC

NFC (near field communication) allows a device to perform simple wireless transactions.
BLU D440
Oppo A57
38% have it

20. has an IPS screen

IPS (In-Plane Switching) is a technology used for LCDs. It was designed to overcome the main limitations of normal TFTs TN-matrices: relatively slow response times, small viewing angles and low quality color reproduction.
BLU D440
Oppo A57
54% have it

21. width

5.9mm narrower.
67mm
Vertu Signature for Bentley: 42mm
72.9mm

22. Has a fingerprint scanner

The device has a fingerprint scanner which identifies the user.
BLU D440
Oppo A57
32% have it

23. height

16.1mm shorter.
133mm
Motorola FlipOut: 67mm
149.1mm

24. Bluetooth version

0.1 newer Bluetooth version.
4
Samsung Galaxy S8 Active: 5.1
4.1

25. has a BSI sensor

A BSI (backside illuminated) sensor is a camera image sensor which captures better quality images in poor lighting conditions, and offers better overall sharpness and image quality.
BLU D440
Oppo A57
32% have it

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