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Which should you buy, the Oppo A31 (2020) 128GB or Lenovo K9 (2018) 32GB? We offer a thorough comparison of the differences in functions, specifications and performance between the two

Created date: 2020-02-13 21:20:33, Updated date: 2020-04-16 19:35:45

Oppo A31 (2020) 128GBLenovo K9 (2018) 32GB
Oppo A31 (2020) 128GBLenovo K9 (2018) 32GB

How did the evaluations between the "Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB" differ when we compared the two? We reviewed each of the most commonly scrutinized features. If you are thinking about which smartphone to get, check out this review immediately!

Oppo A31 (2020) 128GBLenovo K9 (2018) 32GB
Oppo A31 (2020) 128GB

Lenovo K9 (2018) 32GB

General rating:
Holding comfortrating-image3.1
61/100
rating-image3.3
66/100
Weightrating-image2.9
58/100
rating-image3.4
68/100
Screen sizerating-image4.5
90/100
rating-image4.3
85/100
Display qualityrating-image2.7
54/100
rating-image2.9
57/100
Battery liferating-image4.0
80/100
rating-image3.3
65/100
Processing powerrating-image4.4
88/100
rating-image4.4
88/100
Memory capacityrating-image3.5
70/100
rating-image3.0
60/100
Storage capacityrating-image4.5
90/100
rating-image2.8
55/100
Rear camera performancerating-image3.0
59/100
rating-image3.1
61/100
Front camera performancerating-image2.9
58/100
rating-image3.6
71/100

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", performance comparison

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB" size comparison. Which to choose?

The size of the body has a big influence on the ease of carrying and one-handed operation. The narrower the width, the easier it is to firmly grasp and hold, but you also have to take into account the device's thickness. Also, if the width and height are smaller, its easier to operate one-handed since its easier to extend your fingers. On the contrary, if the width and height are large, it's difficult to fit in your pocket and is bulky even when put in a bag, and portability is impaired.

The "Oppo A31 (2020) 128GB" has a width of 75.5mm, a length of 163.9mm, and a thickness of 8.3mm. Also, the "Lenovo K9 (2018) 32GB" has a width of 72.9mm, a length of 153.8mm, and a thickness of 8.0mm.

Comparing the width and thickness of the body, the "Lenovo K9 (2018) 32GB" is smaller and more compact compared to the "Oppo A31 (2020) 128GB". For that reason, the "Lenovo K9 (2018) 32GB" is easier to grip firmly and carry one-handed than the "Oppo A31 (2020) 128GB". For that reason, we recommend the "Lenovo K9 (2018) 32GB".

Comparing the width and thickness of the body, there isn't a large difference in size between the "Oppo A31 (2020) 128GB" and the "Lenovo K9 (2018) 32GB". For that reason their one-handed operability, portability, and bulkiness when carried is about the same. That's why I think it's better to compare them in terms of other aspects of performance and functionality.

Comparing the overall size of the two devices, there isn't a big difference in size between the "Oppo A31 (2020) 128GB" and the "Lenovo K9 (2018) 32GB". For that reason the ease of carrying and use with one hand is about the same for both. That's why it is better to compare the two in terms of other aspects of performance and functionality.

ScoreDimensions (width x height x thickness)
Oppo A31 (2020) 128GB61/10075.5mm x 163.9mm x 8.3mm
Lenovo K9 (2018) 32GB66/10072.9mm x 153.8mm x 8.0mm

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", which is more comfortable to hold? Weight comparison

The weight of the device affects hand fatigue and the burden placed upon the wrist. The lighter it is, the longer you'll be able to operate the device without tiring. Also, if the burden placed on the wrist is lower, you'll be able to use the device more comfortably. However if the weight isn't right for you, it could place more of a burden on your body, causing you to feel stress.

The weight of the "Oppo A31 (2020) 128GB" is about 180.0g, and the weight of the "Lenovo K9 (2018) 32GB" is about 155.0g. Comparing the weight of the two devices, the "Lenovo K9 (2018) 32GB" is a lighter smart phone than the "Oppo A31 (2020) 128GB", with a difference of about 25g. For that reason the "Lenovo K9 (2018) 32GB" is a smart phone that is less likely than the "Oppo A31 (2020) 128GB"to put a burden on your fingers and wrist when used for an extended period. That's why we recommend the "Lenovo K9 (2018) 32GB" over the "Oppo A31 (2020) 128GB".

ScoreWeight
Oppo A31 (2020) 128GB58/100180.0g
Lenovo K9 (2018) 32GB68/100155.0g

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", whose display is easier to use?

The size of the screen affects usability and screen visibility. A larger screen means larger letters and buttons on apps, so the user is less likely to tap adjacent buttons by mistake. In addition, the user can enjoy a more intense experience when playing games and watching videos.

The "Oppo A31 (2020) 128GB" has a 6.5inch display. Also, the "Lenovo K9 (2018) 32GB" has a 5.7inch display. Comparing the screen size, the "Oppo A31 (2020) 128GB" has a larger screen compared to the "Lenovo K9 (2018) 32GB", with a roughly 0.7inch difference. As a result, the user is less likely to mistap when using apps on the "Oppo A31 (2020) 128GB" than on the "Lenovo K9 (2018) 32GB", and is also able to enjoy videos and games on a larger screen. Therefore, we recommend the "Oppo A31 (2020) 128GB".

ScoreDisplay size
Oppo A31 (2020) 128GB90/1006.5inch
Lenovo K9 (2018) 32GB85/1005.7inch

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", which has a clearer display?

Pixel density affects picture quality, and the higher the pixel density, the better the picture quality, which means the user can gain more enjoyment from games and videos. In addition, higher picture quality decreases eyestrain, which means that the user will experience less eye fatigue after prolonged use.

The resolution on the "Oppo A31 (2020) 128GB" is 720 x 1600, and pixel density is 269ppi. Also, the resolution on the "Lenovo K9 (2018) 32GB" is 720 x 1440, and pixel density is 282ppi. Comparing the pixel count, the difference in pixel density between the "Oppo A31 (2020) 128GB" and the "Lenovo K9 (2018) 32GB" is negligible. As a result, they are both evenly matched in terms of picture quality and easiness on the eyes. Therefore, we recommend comparing them based on other aspects of performance and functionality.

ScorePixel density
Oppo A31 (2020) 128GB54/100269ppi
Lenovo K9 (2018) 32GB57/100282ppi

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", a summary of the differences in battery life

Battery performance greatly affects battery life, but greater battery capacity does not necessarily mean greater battery life, since battery efficiency should also be considered. Bigger screens and higher CPU performance will mean the batteries are depleted more quickly.

The "Oppo A31 (2020) 128GB" is 4230.0mAh, and the "Lenovo K9 (2018) 32GB" is 3000.0mAh. Regarding battery capacity, the "Oppo A31 (2020) 128GB" has greater battery capacity than the "Lenovo K9 (2018) 32GB", with a 1230mAh difference. Since the "Oppo A31 (2020) 128GB" can be used for longer periods without recharging than the "Lenovo K9 (2018) 32GB", it is great for outdoor use. If you want a smartphone with a longer battery life, we recommend the "Oppo A31 (2020) 128GB" over the "Lenovo K9 (2018) 32GB".

ScoreBattery capacity
Oppo A31 (2020) 128GB80/1004230.0mAh
Lenovo K9 (2018) 32GB65/1003000.0mAh

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", which has better CPU?

CPU performance affects the ability to process programs, and the ability to process programs is determined by the product of the number of cores in the CPU and the CPU frequency. The higher this performance is, the more smoothly apps and games will run, and with low performance apps and games become heavy and stress is experienced.

The "Oppo A31 (2020) 128GB"'s CPU is a Mediatek MT6765V/CB Helio P35, with performance measured at 2.3GHz+1.8GHz×8(8.0-cores). Also, the "Lenovo K9 (2018) 32GB"'s CPU is a Mediatek MT6762 Helio P22, with performance measured at 2.0GHz×8(8.0-cores). Comparing CPU performance, there is almost no difference in the specs of the "Oppo A31 (2020) 128GB" and the "Lenovo K9 (2018) 32GB". For that reason the level of smoothness felt when using apps and comfortable handling of games is about the same. For that reason it is better to compare them in terms of other aspects of performance and functionality.

ScoreCPU specs
Oppo A31 (2020) 128GB88/1002.3GHz+1.8GHz×8(8.0-cores)
Lenovo K9 (2018) 32GB88/1002.0GHz×8(8.0-cores)

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", what's the difference in memory capacity?

RAM affects multitasking ability and the stability of apps. The larger the amount of RAM is, the more stability there will be even in situations where multiple apps are running simultaneously, allowing for comfortable use. In addition, animation will be more smooth, and apps will be less likely to freeze or crash. Also, without sufficient RAM, there are games you won't be able to run, so it is necessary to be careful.

The weight of the "Oppo A31 (2020) 128GB" is 4.0GB and the weight of the "Lenovo K9 (2018) 32GB" is 3.0GB. Comparing the devices in terms of RAM, the "Oppo A31 (2020) 128GB" has a significantly larger amount of RAM than the "Lenovo K9 (2018) 32GB", with a difference of about 1GB. In terms of the unlikeliness of crashing and the ease of multitasking, 3D games and VR, the "Oppo A31 (2020) 128GB" is superior to the "Lenovo K9 (2018) 32GB". If you're looking for a smart phone that can run multiple apps simultaneously with stability and also allows you to comfortably enjoy 3D games and VR, then we recommend purchasing the "Oppo A31 (2020) 128GB" over the "Lenovo K9 (2018) 32GB".

ScoreRAM size
Oppo A31 (2020) 128GB70/1004.0GB
Lenovo K9 (2018) 32GB60/1003.0GB

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", which has more data storage?

Storage capacity affects the amount of data that is capable of being stored. The larger the storage capacity, the more pictures you can take and the more applications you can install. In addition, if your smartphone accepts SD cards, then you can increase its storage capacity. However, there are performance related drawbacks, including a slower data transfer rate than the primary memory, and you cannot transfer all your data on the card, so be warned.

The data storage capacity of the "Oppo A31 (2020) 128GB" is 128.0GB. Also the "Lenovo K9 (2018) 32GB" is 32.0GB. Regarding storage capacity, the "Oppo A31 (2020) 128GB" has a much larger data storage capacity compared to the "Lenovo K9 (2018) 32GB", with a roughly 96GB difference. In terms of the number of pictures you can save and the applications that you can install, the "Oppo A31 (2020) 128GB" is superior to the "Lenovo K9 (2018) 32GB". If you are looking for a smartphone that can save more data, we recommend the "Oppo A31 (2020) 128GB" over the "Lenovo K9 (2018) 32GB".

ScoreStorage size
Oppo A31 (2020) 128GB90/100128.0GB
Lenovo K9 (2018) 32GB55/10032.0GB

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB" rear camera performance comparison. Which has a higher resolution?

One factor that determines the performance of the exterior camera located on the back of the device (the rear/back camera) is the pixel count. The larger the pixel count, the higher the resolution of the pictures you can take, and the cleaner the pictures will look when printed.

"Oppo A31 (2020) 128GB" has a 12.0MP main camera. Also, "Lenovo K9 (2018) 32GB" has a 13.0MP main camera. Comparing rear camera performance, the "Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB" have approximately the same pixel count. As a result, they can both take pictures and shoot videos of roughly the same quality. Therefore, we recommend comparing the two based on other aspects of performance and functionality.

ScoreRear-camera resolution
Oppo A31 (2020) 128GB59/10012.0MP
Lenovo K9 (2018) 32GB61/10013.0MP

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", whose front camera has a better picture quality?

One factor that determines the performance of the exterior camera located on the front of the device (the in/front camera) is the pixel count. The larger the pixel count, the higher the resolution of the pictures you can take, and the cleaner the pictures will look when printed.

"Oppo A31 (2020) 128GB" has an 8.0MP front camera and "Lenovo K9 (2018) 32GB" has an 13.0MP front camera. Comparing rear camera performance, the front camera of the "Lenovo K9 (2018) 32GB" has a much higher pixel count compared to the "Oppo A31 (2020) 128GB", with a roughly 5MP difference. As a result, the "Lenovo K9 (2018) 32GB" is more suited than the "Oppo A31 (2020) 128GB" for shooting videos and taking pictures. If you are looking for a smartphone that is suited for shooting high resolution selfies which will look clean when printed, we recommend the "Lenovo K9 (2018) 32GB" over the "Oppo A31 (2020) 128GB".

ScoreFront-camera resolution
Oppo A31 (2020) 128GB58/1008.0MP
Lenovo K9 (2018) 32GB71/10013.0MP

"Oppo A31 (2020) 128GB" and "Lenovo K9 (2018) 32GB", performance comparison by specification sheet

Oppo A31 (2020) 128GBLenovo K9 (2018) 32GB
ImageOppo A31 (2020) 128GBLenovo K9 (2018) 32GB
MakerOppoLenovo
Release date2020-02-142018-10
ColorFantasy White/Mystery BlackBlack/Blue
OSAndroidAndroid
Dimensions (width x height x thickness)75.5mm x 163.9mm x 8.3mm72.9mm x 153.8mm x 8.0mm
Weight180.0g155.0g
Display size6.5inch5.7inch
Display typeIPS LCDIPS LCD
Screen resolution (width x height)720 x 1600720 x 1440
Pixel density269ppi282ppi
Battery capacity4230.0mAh3000.0mAh
ChipsetMediatek MT6765V/CB Helio P35Mediatek MT6762 Helio P22
CPU specs2.3GHz+1.8GHz×8(8.0-cores)2.0GHz×8(8.0-cores)
RAM size4.0GB3.0GB
Storage size128.0GB32.0GB
Rear-camera resolution12.0MP13.0MP
Front-camera resolution8.0MP13.0MP

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