BLU J4 vs Coolpad Cool S1

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.

• Weight

  J4: 10 g lighter

  J4:

  158 g

  Cool S1:

  168 g

• Width

  J4: 2.4 mm narrower

  J4:

  72.3 mm

  Cool S1:

  74.7 mm

• Depth

  Cool S1: 2.5 mm thinner

  J4:

  10 mm

  Cool S1:

  7.5 mm

• Release year

  J4:

  2019

  Cool S1:

  2016

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. J4

   Height:

   151 mm

   Width:

   72.3 mm

   Depth:

   10 mm +2.5 mm versus Cool S1

2. 2. Cool S1

   Height:

   151.4 mm

   Width:

   74.7 mm +2.4 mm versus J4

   Depth:

   7.5 mm

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. J4

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   18:9

   Approximate rectangular screen area:

   78.1 cm²

2. 2. Cool S1

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   83.4 cm²

Cool S1 has approximately 6.8% more rectangular screen area than J4.

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.

Practical features

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

Battery capacity

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

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.