Micromax Ninja A91 vs vivo X23

Compare recorded specifications, size and practical differences.

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Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

  • Width

    Ninja A91: 8.1 mm narrower

    Ninja A91:
    66 mm
    X23:
    74.1 mm
  • Screen diagonal

    Ninja A91: 1.91 in smaller diagonal

    Ninja A91:
    4.5 in
    X23:
    6.41 in
  • Chipset

    Ninja A91:
    Mediatek MT6577 (40 nm)
    X23:
    Qualcomm SDM670 Snapdragon 670 (10 nm)
  • Rear camera layout

    Ninja A91:
    Single
    X23:
    Dual
  • Depth

    X23: 2.5 mm thinner

    Ninja A91:
    10 mm
    X23:
    7.5 mm
  • Height

    Ninja A91: 27.7 mm shorter

    Ninja A91:
    130 mm
    X23:
    157.7 mm

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

  1. 1. Ninja A91

    Height:
    130 mm
    Width:
    66 mm
    Depth:
    10 mm +2.5 mm versus X23
    Weight:
    149.1 g
  2. 2. X23

    Height:
    157.7 mm +27.7 mm versus Ninja A91
    Width:
    74.1 mm +8.1 mm versus Ninja A91
    Depth:
    7.5 mm
    Weight:
    Unknown

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

  1. 1. Ninja A91

    Screen diagonal:
    4.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    55.8 cm²
  2. 2. X23

    Screen diagonal:
    6.41 in
    Aspect ratio (height:width):
    19.5:9
    Approximate rectangular screen area:
    100.9 cm²

X23 has approximately 80.7% more rectangular screen area than Ninja A91.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Recorded RAM for Ninja A91, X23, compared at the same storage capacity.
StorageNinja A91X23
128 GB Unknown 8 GB RAM
Ninja A91: Original memory entry

2 GB

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. Ninja A91

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB (dedicated slot)

2. X23

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
No

Battery capacity

Capacity is not battery life. No endurance test is implied.

At least two unambiguous positive capacity values are needed for a chart. Original entries remain in the specifications.

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. Ninja A912. X23

Everyday essentials
Everyday essentials — specifications for Ninja A91, X23.
SpecificationNinja A91X23
Dimensions (HxWxD)
  • 130 Х 66 Х 10 mm
  • 157.7 Х 74.1 Х 7.5 mm
Weight
  • 149.1 g
  • 0 g
Technology
  • TFT
  • Super AMOLED
Screen size
  • 4.5" inch
  • 6.41" inch
Screen resolution
  • 480 x 854 px
  • 1080 x 2340 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 2 GB
  • 128 GB
  • 8 GB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • No
Battery Capacity is not battery life. No endurance test is implied.
  • 0 mAh,
  • 3400 mAh
  • Non-removable Li-Ion
Operating system OS
  • Android 4.0 (Ice Cream Sandwich)
  • Android 8.1 (Oreo); Funtouch 4.5
Chipset
  • Mediatek MT6577 (40 nm)
  • Qualcomm SDM670 Snapdragon 670 (10 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Ninja A91, X23.
SpecificationNinja A91X23
Touchscreen
  • touchscreen
  • capacitive touchscreen
Display colors Unknown
  • 16M
Screen area
  • 55.8 cm2
  • 100.9 cm2
Screen format
  • 16:9 (height:width)
  • 19.5:9 (height:width)
Screen to body ratio
  • 65.0%
  • 86.3%
PPI /points per inch/
  • 218 PPI
  • 402 PPI
Camera and Video
Camera and Video — specifications for Ninja A91, X23.
SpecificationNinja A91X23
Rear camera, main
  • 5 MP
  • Single
  • 12 MP
  • Dual
Camera specs
  • 5 MP
  • 12 MP
  • f/1.8
  • 1/2.55''
  • 1.4µm
  • dual pixel PDAF -13 MP
  • f/2.4
Functions Unknown
  • HDR
Video
  • Yes
  • 1080p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 12 MP
  • Single
Specifications
  • VGA
  • 12 MP
Performance

Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

Performance — specifications for Ninja A91, X23.
SpecificationNinja A91X23
Processor CPU
  • Dual-core 1.0 GHz Cortex-A9
  • Octa-core (4x2.0 GHz Kryo 360 & 4x1.8 GHz Kryo 360)
Graphics processor GPU
  • PowerVR SGX531u
  • Adreno 615
Antutu 7 score * Unknown
  • 146328
General specs
General specs — specifications for Ninja A91, X23.
SpecificationNinja A91X23
Release date
  • 2013
  • March
  • 2018
  • September
Colors
  • Black
  • Phantom Purple
  • Magic Night
  • Phantom Red
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 120 EUR
  • 500 EUR
Battery life
  • Stand by time- Up to 230 h Talking time- Up to 4 h 30 min
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for Ninja A91, X23.
SpecificationNinja A91X23
SIM card
  • Dual SIM
  • Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE band 1(2100)
  • 2(1900)
  • 3(1800)
  • 4(1700/2100)
  • 5(850)
  • 8(900)
  • 34(2000)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA
  • HSPA 42.2/5.76 Mbps
  • LTE-A (2CA) Cat6 300/150 Mbps
GPRS
  • Class 10
  • Yes
Edge
  • Class 12
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • WiFi Direct
  • hotspot
GPS
  • Yes
  • Yes
  • with A-GPS
  • GLONASS
USB
  • Proprietary
  • microUSB 2.0
  • USB On-The-Go
Bluetooth
  • 3.0
  • 5.0
  • A2DP
  • EDR
  • LE
  • aptX
Music and Audio
Music and Audio — specifications for Ninja A91, X23.
SpecificationNinja A91X23
Radio
  • FM radio
  • FM radio
Others Unknown
  • 32-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features
Other features — specifications for Ninja A91, X23.
SpecificationNinja A91X23
Dop
  • Sensors Accelerometer
  • Sensors Fingerprint (under display)
  • accelerometer
  • proximity
  • compass - Fast battery charging 10V/2.25A 22.5W