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What we think
The PerfectRec phone team Learn more
Updated February 23, 2024·
If you prioritize camera quality and are willing to pay more, the Samsung Galaxy S21 Ultra has a better overall camera experience, with high-quality photos and videos, versatility, and features like a telephoto lens with significant optical zoom. On the other hand, if you want to spend less and are okay with basic photography, the Samsung Galaxy A25 offers a less impressive camera setup suitable for casual use. The S21 Ultra also offers a larger, higher resolution screen, more advanced processor, and longer battery life, making it a better choice for heavy usage, gaming, and media consumption. However, the A25 still provides good quality with its OLED screen and decent performance for everyday tasks at a more budget-friendly price. Both phones have the same storage capacity and the Android operating system. 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 Samsung Galaxy A25
- The Samsung Galaxy A25 has no clear advantages over the Samsung Galaxy S21 Ultra.
Advantages of the Samsung Galaxy S21 Ultra
- Good for taking photos
- Good for recording videos
- Very good display quality
- Good performance
Key differences
Overall Camera Quality
7.8
The Samsung Galaxy A25 has poor overall camera quality, while the Samsung Galaxy S21 Ultra has good overall camera quality.
The Samsung Galaxy S21 Ultra boasts superior camera capabilities over the Samsung Galaxy A25, particularly in selfie quality, dynamic range, and low-light performance, which are very good and good for the S21 Ultra compared to poor across all these aspects for the A25. Additionally, the S21 Ultra offers a richer experience in camera versatility and software, enhancing its overall photo and video capabilities.
Photo Quality
7.8
The Samsung Galaxy A25 takes poor photos, while the Samsung Galaxy S21 Ultra takes good photos.
The Samsung Galaxy A25 takes poor photos because its camera has low scores in key areas like software experience, dynamic range, and low light performance, and it also has a particularly poor selfie quality. In contrast, the Samsung Galaxy S21 Ultra is recognized for good photos due to a much stronger performance across these areas, reflecting a better overall camera system and selfie capabilities.
Video Quality
7.1
The Samsung Galaxy A25 takes poor videos, while the Samsung Galaxy S21 Ultra takes good videos.
The Samsung Galaxy S21 Ultra offers a superior video experience with higher video resolution/framerate, better video stabilization, more dynamic range, enhanced low light performance, and higher mic quality when compared to the Samsung Galaxy A25, which falls short in those aspects primarily due to its lower video capabilities and less advanced camera technology. While the Galaxy S21 Ultra includes HDR10+ support and higher scores across all video-related parameters, the Galaxy A25 struggles with poor ratings in the same categories, reflecting its inferior video performance.
Battery
8.7 Hours
6.7 Hours
The Samsung Galaxy A25 has 8.7 hours of battery life. The Samsung Galaxy S21 Ultra has 6.7 hours of battery life.
Cost
$300
$423
$100
$200
$300
$400
$500
$600
$700
The Samsung Galaxy A25 has a price of $300 and the Samsung Galaxy S21 Ultra costs $423.
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Key similarities
Screen Size
The Samsung Galaxy A25 has a screen size of 6.5 inches and the Samsung Galaxy S21 Ultra is 6.8 inches.
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How the Samsung Galaxy A25 and the Samsung Galaxy S21 Ultra compare to other phones
Spec Comparison
 |  | |
| Samsung Galaxy A25 | Samsung Galaxy S21 Ultra |
GENERAL | |||
|---|---|---|---|
| Price | |||
$300 | $423 | ||
Brand | |||
Brand | Samsung | Samsung | |
Operating System | |||
Operating System | Android | Android | |
Release Date | |||
Release Date | January 1, 2024 | January 29, 2021 | |
SCREEN | |||
|---|---|---|---|
Screen Size | |||
Screen Size | 6.5" | 6.8" | |
Resolution | |||
Resolution | 2340 x 1080 | 3200 x 1440 | |
Variable refresh rate | |||
Variable refresh rate | No | Yes | |
Pixels Per Inch | |||
Pixels Per Inch | 396 | 515 | |
Display Type | |||
Display Type | OLED | OLED | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | D6100+ | SD888 | |
Internal Storage | |||
Internal Storage | 128 GB | 128 GB | |
RAM | |||
RAM | 6 GB | 12 GB | |
CAMERA | |||
|---|---|---|---|
Overall Camera Quality Score | |||
Overall Camera Quality Score | 7.9/10 | ||
Photos Score | |||
Photos Score | 7.8/10 | ||
Videos Score | |||
Videos Score | 7.1/10 | ||
Rear Cameras | |||
Rear Cameras | Main, Ultrawide, Macro | Main, Ultrawide, Telephoto, Super Telephoto | |
Main Camera | |||
Main Camera | 50 megapixels + OIS | 108 megapixels + OIS | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 8.7 Hours | 6.7 Hours | |
Battery Capacity | |||
Battery Capacity | 5000 mAh | 5000 mAh | |
Wireless Charging | |||
Wireless Charging | Yes | Yes | |
Wireless charging Speed | |||
Wireless charging Speed | 15 W | 15 W | |
Reverse wireless charging | |||
Reverse wireless charging | Yes (4.5 watts) | Yes (4.5 watts) | |
PHYSICAL | |||
|---|---|---|---|
Size | |||
Size | 6.34" x 3.01" | 6.5" x 2.98" | |
Weight | |||
Weight | 6.95 oz | 8.01 oz | |
Back Material | |||
Back Material | Plastic | Glass | |
Stereo Speakers | |||
Stereo Speakers | No | No | |
CONNECTIVITY | |||
|---|---|---|---|
Dual SIM | |||
Dual SIM | Yes | Yes | |
Bluetooth Version | |||
Bluetooth Version | 5.3 | 5.2 | |
A2DP | |||
A2DP | Yes | Yes | |
WiFi Version | |||
WiFi Version | 5 | 6e | |
NFC | |||
NFC | Yes | Yes | |
US 5G Bands | |||
US 5G Bands | (SA/NSA/Sub6)1, 3, 5, 7, 8, 26, 28, 40, 41, 66, 77, 78 | (SA/NSA/Sub6/mmWave)2, 5, 25, 41, 66, 71, 260, 261 (SA/NSA/Sub6)1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 | |
OTHER FEATURES | |||
|---|---|---|---|
Biometric unlock | |||
Biometric unlock | Face unlock, Fingerprint sensor: Side | Face unlock, Fingerprint sensor: Under Display | |
Unlockable Bootloader | |||
Unlockable Bootloader | No | No | |
Color | |||
Color | Blue Black | Phantom Black, Phantom Silver, Phantom Navy, Phantom Titanium | |
Stock Android | |||
Stock Android | No | No | |
SD Card | |||
SD Card | No | No | |
Shopping
Samsung Galaxy S21 Ultra
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Dig into reviews and images
Android Authority
David Imel | January 2023
"The Galaxy S21 Ultra is a killer combo of great design, blazing-fast performance, a wonderful display, long-lasting battery life, and one of the most versatile camera systems you can get in a smartphone today."
Get a great deal on the Samsung Galaxy A25 or the Samsung Galaxy S21 Ultra
About Samsung
Samsung is one of the most recognizable names in the smartphone industry, standing as the undisputed best-selling brand of Android smartphones in the United States for many years now. Samsung is known for offering a variety of smartphones in all available price points, as well as for implementing cutting-edge technology and innovative features in their flagship devices, ones that often shape the market going forward. The company offers its own unique spin on Android, called One UI, which focuses on offering a multitude of features and is heavily customizable, according to user preference.
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Why trust us
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.
By the numbers
68
Phones evaluated
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Proprietary Phones ratings developed
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Recommendations made
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Consumer hours saved
About the phone team
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CEO and Phones Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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Chief Data Scientist
Nick is a machine learning expert with a Ph.D in recommendation systems from the University of Warwick.
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Head of Product
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