Samsung Galaxy A05 vs Samsung Galaxy S21 Ultra

Compared 2 smartphones : Samsung Galaxy A05 Manufactured in October, 2023, with display 6.7 with chipsetMediatek Helio G85, vs Samsung Galaxy S21 Ultra, Manufactured in February, 2021 with chipsetSamsung Exynos 2100. Below are specs, tests, pros and cons for each device

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy A05
  • Lighter design: 195g vs 227g
  • Newer Bluetooth version: 5.3 vs 5.2
Reasons to choose Samsung Galaxy S21 Ultra
  • Larger display: 6.8in
  • Higher pixel density: 515ppi
  • Higher refresh rate: 120Hz
  • Supports newer USB: 3.2 vs 2
  • Built-in eSIM
  • Fingerprint scanner

Versions

Available versions and configurations
Memory Options - 3/32 GB
- 4/64 GB
- 4/128 GB
- 6/128 GB
- 12/128 GB
- 12/256 GB
- 12/512 GB
- 16/256 GB
- 16/512 GB

Review

Key Specs Samsung Galaxy A05 and Samsung Galaxy S21 Ultra
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison

Display

Display quality comparison
Type PLS TFT Dynamic AMOLED
Size 6.7 in 6.8 in
Resolution 720x1600 pixels 1440x3200 pixels
Aspect ratio 20:9 20:9
Pixel density 262 ppi 515 ppi
Refresh rate 60 Hz 120 Hz
Adaptive refresh rate No Yes (10-120 Hz)
Max brightness 450 nits 1500 nits
HDR support No Yes HDR10+
Screen-to-body ratio 82.1 % 89.5 %
Features n/a - DCI-P3
- Always-On Display
Display test
Peak brightness (auto)
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
1019 nits

Design & Build

Design and ergonomics comparison
Height 168.8 mm (6.65 in) 165.1 mm (6.5 in)
Width 78.2 mm (3.08 in) 75.6 mm (2.98 in)
Thickness 8.8 mm (0.35 in) 8.9 mm (0.35 in)
Weight 195 g (6.88 oz) 227 g (8.01 oz)
Water resistance No IP68
Back panel Plastic Glass
Frame Plastic Metal
Colors - Black
- Silver
- Green
- Black
- Silver
- Gray
- Blue
Fingerprint sensor No Yes In-Display
Screen-to-body ratio
Samsung Galaxy A05
82.1 %
Samsung Galaxy S21 Ultra
89.5 %

Performance

Testing Samsung Galaxy A05 and Samsung Galaxy S21 Ultra In benchmarks
Processor
Chipset Mediatek Helio G85 Samsung Exynos 2100
Max Frequency 2000 MHz 2900 MHz
CPU Cores 8 (2 + 6) 8 (1 + 3 + 4)
Architecture - 6/1.8 (Cortex-A55)
- 2/2 (Cortex-A75)
- 4/2.2 (Cortex-A55)
- 3/2.81 (Cortex-A78)
- 1/2.91 (Cortex-X1)
Process TSMC Samsung
Transistor Size 12 nm 5 nm
Neural Processor Yes Yes
Graphics Mali-G52 MP2 Mali-G78 MP14
GPU Cores 48 896
GPU Frequency 1000 MHz 854 MHz
FLOPS 96 GFLOPS 1530.4 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy A05
419
Samsung Galaxy S21 Ultra
1449
Geekbench 6 (Multi-Core)
Samsung Galaxy A05
1386
Samsung Galaxy S21 Ultra
3892
Geekbench 6 (Single-Core)4191449
Geekbench 6 (Multi-Core)13863892
AnTuTu 10
AnTuTu 10
Samsung Galaxy A05
242864
Samsung Galaxy S21 Ultra
843008
CPU85469232358
GPU30191256356
Memory57005163007
UX70199191217
NanoReview Score242864843008
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
5221
Max Surface Temp.n/a40.8 °C
Stabilityn/a69 %
Graphics Testn/a31 fps
Graphics Scoren/a5221

Memory

RAM
RAM Size - 4 GB
- 6 GB
- 12 GB
- 16 GB
Memory Type LPDDR4X LPDDR5
Memory Frequency 1800 MHz 2750 MHz
Channels 2 2
Storage
Storage Capacity128 GB- 128 GB
- 256 GB
- 512 GB
Storage TypeeMMC 5.1UFS 3.1
Memory CardMicroSDNo

Software

OS Android 13 (Upgradeable to Android 14) Android 11 (Upgradeable to Android 14)
OS Size n/a 26.4 GB
UI Skin One UI 6.1 Core One UI 6

Battery

Volume 5000 mAh 5000 mAh
Max Charging Power 25 W 25 W
Battery Type Li-ion Li-ion
Removable No No
Wireless Charging No Yes (15 W)
Reverse Charging No Yes (Wireless)
Fast Charging Yes (48% in 30 min) Yes (54% in 30 min)
Full Charge Time 1:50 h 1:11 h
Battery Life Test
Battery Life
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
22:05
Web Browsingn/a07:58 h
Video Playbackn/a13:59 h
Gamesn/a05:14 h
Standby Moden/a111 h

Main camera

Matrix 50 MP 108 MP
Photo resolution 8192x6144 pixels 12000x9000 pixels
Zoom Digital Optical, 10x
Flash LED Dual LED
Stabilization Digital Optical
8K Recording No Up to 24FPS
4K Recording No Yes (Up to 60 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 120 fps (720p) 960 fps (720p)
Wide-angle lens n/a 120 °
Lenses count Standard: 50 MP
Depth: 2 MP
Standard: 108 MP
Telephoto: 10 MP
Telephoto: 10 MP
Ultra-wide: 12 MP
Features - Bokeh effect
- Pro mode
- Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix50 MP108 MP
Aperturef/1.8f/1.8
Focal lengthn/a26 mm
Sensorn/aSamsung S5KHM3
Sensor size1/2.81/1.33
Pixel sizen/a0.8 μm
AutofocusPhase autofocusLaser autofocus
StabilizationDigitalOptical
Telephoto
Matrixn/a10 MP
Aperturen/af/4.9
Focal lengthn/a240 mm
Sensorn/aSamsung S5K3J1
Sensor sizen/a1/2.65
Pixel sizen/a1.22 μm
Stabilizationn/aOptical
Ultra-wide lens
Matrixn/a12 MP
Aperturen/af/2.2
Focal lengthn/a13 mm
Sensorn/aSony IMX563
Sensor sizen/a1/2.55
Pixel sizen/a1.4 μm
Stabilizationn/aDigital
Main camera DxOMark results
Photo quality
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
121
Video quality
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
100
Overall camera score
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
115
Bokehn/a70
Previewn/a67
Zoomn/a106

Front camera

Matrix 8 MP 40 MP
Photo resolution 3264x2448 pixels 7864x5200 pixels
Aperture f/2.0 f/2.2
Focal length n/a 26 mm
Sensor CMOS Samsung S5KGH1
Sensor size 1/4.0 1/2.65
Pixel size n/a 0.7 μm
Autofocus No Phase autofocus
Stabilization No Digital
Video resolution 1080p (Full HD) at 30 fps 2160p (4K) at 60 fps
TOF 3D sensor No No
Selfie camera DxOMark results
Photo quality
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
133
Video quality
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
140

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 6E (802.11 a/b/g/n/ac/ax)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5.3 5.2
Bluetooth features LE LE, A2DP
USB type USB Type-C USB Type-C
USB version 2 3.2
USB features - Charging
- USB Storage Mode
- Charging
- USB Storage Mode
- USB-Host mode
- OTG
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- GPS
- GLONASS
- Beidou
- Galileo
NFC* No Yes
Infrared Port No No
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoYes
Hybrid SlotNoNo
2G BandsGSM850, GSM900, DCS1800GSM 850, 900, 1800, 1900 MHz
3G BandsUMTS B1(2100), B5(850), B8(900)WCDMA Band 1, 2, 4, 5, 8
LTE Bands*LTE (B1/B3/B5/B7/B8/B20/B28/B38/B40/B41)LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B38/B39/B40/B41/B66)
LTE category724
5G SupportNoYes

Sound

Speakers Mono Stereo
3.5 mm Jack Yes No
FM Radio No No
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Samsung Galaxy A05
n/a
Samsung Galaxy S21 Ultra
88 dB

Other

Class Budget Flagship
Announced September, 2023 yr January, 2021 yr
Release Date October, 2023 yr February, 2021 yr
Launch Price ($) 120 1200
Sensors - Proximity Sensor
- Accelerometer
- Ambient Light Sensor
- Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included No n/a
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Samsung Galaxy S21 Ultra the clear winner in this comparison.

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