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Updated January 10, 2024·
The Asus Zenfone 9 is positioned at a higher price than the OnePlus 9, and this comes with improvements in certain areas such as better battery life and a more powerful processor. If the camera is a priority for you, both phones offer good quality, but the Zenfone 9 offers slightly higher photo and video quality, along with RAW output for more editing control. On the other hand, the OnePlus 9 has a larger screen, which might be preferred for media consumption and gaming. Both devices run on Android and offer similar peak brightness, refresh rates, and resolution on their OLED screens. If you're keen on headphone jack, the Zenfone 9 has one, whereas the OnePlus 9 does not. Assessing your usage and prioritizing what matters most to you—whether it's better performance and camera quality at a higher price with the Zenfone 9, or a larger screen and more reasonable cost with the OnePlus 9—will help you make the best decision. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the Asus Zenfone 9
- Good battery life
Advantages of the OnePlus 9
- The OnePlus 9 has no clear advantages over the Asus Zenfone 9.
Key differences
Overall Camera Quality
6.2
7.0
The OnePlus 9 has good overall camera quality, while the Asus Zenfone 9 has only fair overall camera quality.
The Asus Zenfone 9's cameras are poor due to weaker performance across various functionalities like software experience for photos, dynamic range, low light capability, and overall versatility, with its selfie camera quality rated as only fair. In contrast, the OnePlus 9 has fair cameras due to somewhat better performance in these areas, including dynamic range and low light photos, and good video stabilization, although both phones share similar shortcomings in video and microphone quality.
Photo Quality
6.0
6.7
The OnePlus 9 and Asus Zenfone 9 both have only fair photos, though the OnePlus 9 takes somewhat better photos.
The Asus Zenfone 9 has a lower quality selfie camera and performs poorly in areas like dynamic range and low light performance, while the OnePlus 9, despite having fair selfies and similar challenges in dynamic range and low light, benefits from slightly better software experience for photos.
Video Quality
6.4
5.9
The Asus Zenfone 9 takes only fair videos, while the OnePlus 9 takes poor videos.
The Asus Zenfone 9 and OnePlus 9 both take fair videos due to their proficiency in video resolution and frame rate, as well as having effective video stabilization and decent microphone quality. However, they fall short when it comes to video dynamic range and low light performance, which affects the overall video quality, especially in challenging lighting conditions.
Battery
7.8 Hours
6.9 Hours
The Asus Zenfone 9 has 7.8 hours of battery life. The OnePlus 9 has 6.9 hours of battery life.
Screen Size
The Asus Zenfone 9 has a screen size of 5.9 inches and the OnePlus 9 is 6.55 inches.
Cost
$700
$399
$200
$400
$600
$800
$1,000
$1,200
The Asus Zenfone 9 has a price of $700 and the OnePlus 9 costs $399.
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How the Asus Zenfone 9 and the OnePlus 9 compare to other phones
Spec Comparison
 |  | |
| Asus Zenfone 9 | OnePlus 9 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$700 | $399 | ||
Brand | |||
Brand | Asus | OnePlus | |
Operating System | |||
Operating System | Android | Android | |
Release Date | |||
Release Date | September 15, 2022 | March 26, 2021 | |
SCREEN | |||
|---|---|---|---|
Screen Size | |||
Screen Size | 5.9" | 6.55" | |
Resolution | |||
Resolution | 2400 x 1080 | 2400 x 1080 | |
Variable refresh rate | |||
Variable refresh rate | No | No | |
Pixels Per Inch | |||
Pixels Per Inch | 445 | 402 | |
Display Type | |||
Display Type | OLED | OLED | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | SD8+G1 | SD888 | |
Internal Storage | |||
Internal Storage | 128 GB | 128 GB | |
RAM | |||
RAM | 6 GB | 8 GB | |
CAMERA | |||
|---|---|---|---|
Overall Camera Quality Score | |||
Overall Camera Quality Score | 6.3/10 | 7/10 | |
Photos Score | |||
Photos Score | 6/10 | 6.8/10 | |
Videos Score | |||
Videos Score | 6.5/10 | 5.9/10 | |
Rear Cameras | |||
Rear Cameras | Main, Ultrawide | Main, Ultrawide | |
Main Camera | |||
Main Camera | 50 megapixels + OIS | 48 megapixels | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 7.8 Hours | 6.9 Hours | |
Battery Capacity | |||
Battery Capacity | 4300 mAh | 4500 mAh | |
Wireless Charging | |||
Wireless Charging | No | Yes | |
Wireless charging Speed | |||
Wireless charging Speed | 0 W | 15 W | |
Reverse wireless charging | |||
Reverse wireless charging | No | No | |
PHYSICAL | |||
|---|---|---|---|
Size | |||
Size | 5.77" x 2.68" | 6.29" x 2.92" | |
Weight | |||
Weight | 5.96 oz | 6.77 oz | |
Back Material | |||
Back Material | Plastic | Glass | |
Stereo Speakers | |||
Stereo Speakers | No | No | |
CONNECTIVITY | |||
|---|---|---|---|
Dual SIM | |||
Dual SIM | Yes | No | |
Bluetooth Version | |||
Bluetooth Version | 5.2 | 5.2 | |
A2DP | |||
A2DP | Yes | Yes | |
WiFi Version | |||
WiFi Version | 6e | 6 | |
NFC | |||
NFC | Yes | Yes | |
US 5G Bands | |||
US 5G Bands | (SA/NSA/Sub6)1, 2, 3, 5, 7, 8, 12, 20, 25, 28, 29, 30, 38, 40, 41, 48, 66, 71, 77, 78, 89 | (SA/NSA/Sub6)1, 2, 3, 5, 7, 8, 20, 25, 28, 38, 40, 41, 48, 66, 71, 77, 78 | |
OTHER FEATURES | |||
|---|---|---|---|
Biometric unlock | |||
Biometric unlock | Fingerprint sensor: Side | Face unlock, Fingerprint sensor: Under Display | |
Unlockable Bootloader | |||
Unlockable Bootloader | No | Yes | |
Color | |||
Color | Sunset Red, Starry Blue | Astral Black, Arctic Sky, Winter Mist | |
Stock Android | |||
Stock Android | Yes | No | |
SD Card | |||
SD Card | No | No | |
Shopping
Asus Zenfone 9
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Dig into reviews and images
Android Authority
Robert Triggs | March 2023
"The Asus Zenfone 9 is a compact device that still packs more than enough power under the hood. It's compact size, Bluetooth and audio features (including a headphone jack!), and hardware gestures combine to offer a package that does enough differently to warrant your attention."
OnePlus 9
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Dig into reviews and images
TechRadar
David Lumb | April 2021
"If you’re hunting for the best Android camera phone at this price, and one that doesn’t skimp on specs the OnePlus 9 is worth considering. Courtesy of a partnership with Hasselblad, the cameras offer better color correction, and both regular and ultra-wide photos look great. The OnePlus 9’s battery fully charges in under 30 minutes over a cable, and in 45 minutes using wireless charging. If you hate waiting for hours to charge your phone, you'll love the OnePlus 9."
Get a great deal on the Asus Zenfone 9 or the OnePlus 9
About ASUS
Asus is a well-known player in the mobile world, and in the past few years it has been known for covering specific niches in the smartphone market. Their Zenfone line of devices appeal to small phone enthusiasts, by providing very well-rounded and capable phones at a package that is not too large to operate with one hand – something hard to find in modern Android smartphones. Conversely, their ROG line of devices cater to mobile gamers, by providing a slew of hardware and software features, specifically tailored to enhance the mobile gaming experience. Additionally, Asus is one of the only manufacturers left that continues to include headphone jacks in their lineup of phones, a feature that has become exceedingly rare in today's market.
About OnePlus
OnePlus, established in 2013, is a smartphone brand that first became known for providing flagship-like devices, at a fraction of the cost compared to more expensive Android competitors. OnePlus focuses on creating smartphones with powerful hardware at reasonable prices. They also bring hardware features normally not seen in other Android phones sold in the US, such as their ultra-fast “Warp Charge” and the beloved “Alert Slider”.
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This information was produced and vetted by the PerfectRec phones team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest phone information and makes it digestible for you.
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About the phone team
Joe Golden, Ph.D
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Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
Jason Lew
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Chandradeep Chowdhury
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Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
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Phones Expert
Efthimis is a Greece-based product expert focusing on smartphones. He has been recommending phones for 4 years and his recommendations on Reddit have earned him over 35k karma.
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