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What we think
The PerfectRec phone team Learn more
Updated February 23, 2024·
If you are looking for a high-end experience and are willing to pay more, the Samsung Galaxy S21 Ultra offers a superior camera with capabilities like 10x optical zoom, better video recording quality, and a more vibrant screen with a higher resolution and refresh rate. In contrast, the Samsung Galaxy A15 is considerably less expensive and still offers a decent camera, but with fewer features and lower performance. For battery life, the A15 has a slightly longer battery life. The S21 Ultra has a more premium design with a glass back compared to the plastic back of the A15. If budget is a priority and you are okay with basic features, go for the A15; if performance and camera quality are more important, the S21 Ultra is the better option despite the higher cost. 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 A15
- The Samsung Galaxy A15 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 A15 has poor overall camera quality, while the Samsung Galaxy S21 Ultra has good overall camera quality.
The Samsung Galaxy S21 Ultra boasts a superior camera experience with good selfie quality, high photos resolution, and impressive photos software experience, leading to better dynamic range and low light performance. In contrast, the Samsung Galaxy A15 has a weaker camera setup with poor ratings across the board for selfie quality, photos resolution, dynamic range, low light performance, and overall camera versatility.
Photo Quality
7.8
The Samsung Galaxy A15 takes poor photos, while the Samsung Galaxy S21 Ultra takes good photos.
The Samsung Galaxy S21 Ultra takes good photos partly because it has a high selfie quality, complemented by better overall photo resolution, dynamic range, and low light performance. In contrast, the Samsung Galaxy A15 takes poor photos as it has a lower selfie quality along with weaker photo resolution, dynamic range, and low light capabilities.
Video Quality
7.1
The Samsung Galaxy A15 takes poor videos, while the Samsung Galaxy S21 Ultra takes good videos.
The Samsung Galaxy S21 Ultra delivers superior videos due to its high-resolution and framerate capabilities, advanced video software, effective video stabilization, broader dynamic range, and excellent low light performance, complemented by high-quality microphone audio. In contrast, the Samsung Galaxy A15 falls short in all these areas, leading to its poor video quality.
Battery
9.1 Hours
6.7 Hours
The Samsung Galaxy A15 has 9.1 hours of battery life. The Samsung Galaxy S21 Ultra has 6.7 hours of battery life.
Cost
$200
$423
$100
$200
$300
$400
$500
$600
$700
The Samsung Galaxy A15 has a price of $200 and the Samsung Galaxy S21 Ultra costs $423.
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Key similarities
Screen Size
The Samsung Galaxy A15 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 A15 and the Samsung Galaxy S21 Ultra compare to other phones
Spec Comparison
 |  | |
| Samsung Galaxy A15 | Samsung Galaxy S21 Ultra |
GENERAL | |||
|---|---|---|---|
| Price | |||
$200 | $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 | E1280 | SD888 | |
Internal Storage | |||
Internal Storage | 128 GB | 128 GB | |
RAM | |||
RAM | 4 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 | 108 megapixels + OIS | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 9.1 Hours | 6.7 Hours | |
Battery Capacity | |||
Battery Capacity | 5000 mAh | 5000 mAh | |
Wireless Charging | |||
Wireless Charging | No | Yes | |
Wireless charging Speed | |||
Wireless charging Speed | 0 W | 15 W | |
Reverse wireless charging | |||
Reverse wireless charging | No | Yes (4.5 watts) | |
PHYSICAL | |||
|---|---|---|---|
Size | |||
Size | 6.3" x 3.02" | 6.5" x 2.98" | |
Weight | |||
Weight | 7.05 oz | 8.01 oz | |
Back Material | |||
Back Material | Plastic | Glass | |
Stereo Speakers | |||
Stereo Speakers | No | No | |
CONNECTIVITY | |||
|---|---|---|---|
Dual SIM | |||
Dual SIM | No | 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 | Light Blue, Blue Black | Phantom Black, Phantom Silver, Phantom Navy, Phantom Titanium | |
Stock Android | |||
Stock Android | No | No | |
SD Card | |||
SD Card | Yes | 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 A15 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
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Phones evaluated
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Recommendations made
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Consumer hours saved
About the phone team
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Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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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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