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  3. Focus Plus vs Solaris Color

inkBOOK Focus Plus vs inkBOOK Solaris Color

What Focus Plus does better (3) and where Solaris Color wins (3) — every spec side by side.

inkBOOK Focus Plus
inkBOOK · 2024Focus Plus
7.1Score
3 advantages≈ $280
vs
inkBOOK Solaris Color
inkBOOK · 2025Solaris Color
7.4Score
3 advantages≈ $155
Higher score
8.8Screen8.4
2.5Comfort & build6.3
7.6Battery4.8
8.1Features7.5
Dimensions

Size comparison

Focus PlusSolaris Color
140 × 1929112 × 1548.4
Focus PlusSolaris ColorDifference
Height192 mm154 mm+38 mm
Width140 mm112 mm+28 mm
Thickness9 mm8.4 mm+0.6 mm
Weight251 g174 g+77 g

Drawn to the same scale from the official dimensions (front and side).

Why is Focus Plus better than Solaris Color?

  1. Battery capacity2,900 mAh vs 1,900 mAh+53%
  2. Battery life (claimed)4 weeks vs 2 weeks2×
  3. Screen size7.8″ vs 6″+30%

Why is Solaris Color better than Focus Plus?

  1. Weight251 g vs 174 g+44%
  2. Colour screenNo · Focus Plus: Yes
  3. Thickness9 mm vs 8.4 mm+7%
Specifications

Side by side

inkBOOK Focus PlusinkBOOK Focus Plus≈ $2807.1
inkBOOK Solaris ColorinkBOOK Solaris Color≈ $1557.4
Screen
Screen size7.8″6″
Resolution1872 × 14041448 × 1072
Pixel density300 ppi300 ppi
Screen technologyE Ink Carta 1300E Ink Kaleido 3
Colour screenNoYes
Colour pixel density—150 ppi
Front lightYesYes
Warm light (adjustable colour temperature)YesYes
Design
Weight251 g174 g
Width140 mm112 mm
Height192 mm154 mm
Thickness9 mm8.4 mm
Battery
Battery capacity2,900 mAh1,900 mAh
Battery life (claimed)4 weeks2 weeks
USB-CYesYes
Storage
Storage32 GB32 GB
RAM2 GB2 GB
Memory card slotYes—
Max memory card2,048 GB—
Software & books
PlatformAndroidAndroid
Operating systemAndroid 11Android 11
Supported formatsEPUB, PDF, MOBI, AZW3EPUB, PDF, MOBI, AZW3, FB2, CBZ, DOC, RTF, TXT
EPUB supportYesYes
Text-to-speechYesYes
Audiobooks / audio playback—Yes
Connectivity & audio
Wi-FiYesYes
BluetoothYesYes

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