BLU J4 vs Oppo R7s

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.

• Display technology

  OLED versus LCD

  J4:

  LCD

  R7s:

  OLED

• Width

  J4: 3.1 mm narrower

  J4:

  72.3 mm

  R7s:

  75.4 mm

• Depth

  R7s: 3 mm thinner

  J4:

  10 mm

  R7s:

  7 mm

• Release year

  J4:

  2019

  R7s:

  2015

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 +3 mm versus R7s

2. 2. R7s

   Height:

   151.8 mm

   Width:

   75.4 mm +3.1 mm versus J4

   Depth:

   7 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. R7s

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   83.4 cm²

R7s 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.