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Kafka’s EPUB reader provides a comfortable reading experience with extensive customization options. Adjust fonts, text size, background colors, and more to match your reading preferences.

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Opening EPUB Files

Start reading EPUB books from the app:
1

Select an EPUB item

Find an item that contains EPUB files through search or browse. EPUB files are common for fiction and non-fiction books.
2

Choose your file

On the item detail page, tap an EPUB file to open it in the reader. The file will load and display the book content.
3

Wait for parsing

EPUB files are parsed when first opened. A progress indicator shows while the book is being prepared for reading.
EPUB files must be downloaded before reading. The download happens automatically when you open an EPUB for the first time.

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Reading Interface

The EPUB reader displays text in a clean, book-like format:
  • Chapter view - Content flows continuously through chapters
  • Justified text - Text is justified for a traditional book appearance
  • Custom fonts - Choose from multiple font families
  • Adjustable size - Scale text to your preferred reading size
  • Theme options - Select background colors for different lighting conditions
  • Scroll to read - Scroll vertically through the book content
  • Continuous flow - Chapters flow seamlessly from one to the next
  • Tap for settings - Tap anywhere to access reader settings
The EPUB reader remembers your scroll position, so you’ll always return to where you left off.

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Customization Settings

Personalize your reading experience with comprehensive customization options. Tap anywhere on the page to open the settings sheet.

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Font Size

Adjust text size for comfortable reading:
1

Open settings

Tap anywhere on the reading screen to show the settings sheet at the bottom.
2

Find font size control

Look for the “Font Size” section with a slider control and preview text (“Aa” in small and large sizes).
3

Adjust size

Drag the slider left to decrease or right to increase text size. Changes apply immediately.

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Available Sizes

  • 12sp - Extra small (line height: 18sp)
  • 14sp - Small (line height: 18sp)
  • 16sp - Medium (line height: 24sp) - Default
  • 18sp - Medium-large (line height: 26sp)
  • 20sp - Large (line height: 28sp)
  • 22sp - Extra large (line height: 30sp)
  • 24sp - Maximum (line height: 32sp)
Line height adjusts automatically with font size to maintain comfortable readability.

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Font Style

Select the font family that’s most comfortable for your eyes:

Serif

Traditional book-style font with decorative strokes. Best for long-form reading. (Default)

Sans Serif

Clean, modern font without decorative strokes. Good for clarity and quick reading.

Monospace

Fixed-width font where all characters are the same width. Useful for technical content.

Cursive

Flowing, handwriting-style font. Adds a personal touch to reading.
1

Open font settings

Tap the screen to show settings, then locate the “Font Style” section.
2

Preview fonts

Each font is shown with its name in the actual font style. Tap any option to preview it.
3

Select your preference

Tap your preferred font. The change applies immediately to all text.

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Background Color

Choose a background color that’s comfortable for your current lighting conditions:

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Dark Mode Backgrounds

When using dark mode, select from:
  • Surface - Default dark surface color (follows system theme)
  • Surface Variant - Alternative dark surface
  • Dark Gray (#2C2C2E) - Softer dark gray
  • Charcoal (#1C1C1E) - Deep charcoal
  • True Black (#121212) - Pure black for OLED screens
  • Warm Dark (#3B3B2E) - Dark with warm tone
  • Deep Black (#0D0D0D) - Deepest black

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Light Mode Backgrounds

When using light mode, select from:
  • Surface - Default light surface color (follows system theme)
  • Surface Variant - Alternative light surface
  • Light Gray (#F5F5F5) - Soft gray
  • Sepia (#FAF3E0) - Warm, cream color (reduces eye strain)
  • Cool Gray (#E9E9E9) - Neutral gray
  • Ivory (#FFFFF0) - Off-white with warm tone
  • Blush (#FDF1F1) - Very light pink tint
1

Access background settings

Tap the screen and scroll to the “Background” section in settings.
2

View color options

You’ll see a horizontal row of color swatches. The currently selected color has a highlighted border.
3

Try a color

Tap any color swatch to apply it. The background changes immediately so you can see how it looks with your content.
Sepia (light) and Dark Gray (dark) are popular choices that reduce eye strain during extended reading sessions.

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Saving Your Preferences

Your reading preferences are automatically saved:
  • Settings persist when you close and reopen books
  • Preferences apply to all EPUB files you read
  • Each customization setting is independent
  • Changes take effect immediately

Quick Settings Access

Tap anywhere on the reading screen at any time to access settings. Tap outside the settings sheet to close it and return to reading.

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Reading Progress

Kafka automatically tracks your reading progress:
  • Scroll position - Your exact position in the text is saved
  • Chapter tracking - Resume reading in the correct chapter
  • Automatic bookmarking - No need to manually save your place
  • Cross-device sync - Reading position syncs when signed in
1

Reading automatically saves

As you scroll through the book, your position is continuously saved in the background.
2

Close anytime

Exit the reader at any point using the back button or navigation.
3

Resume later

When you reopen the book, you’ll return to your exact scroll position.

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Best Practices

For the best EPUB reading experience:

Font Pairing

Match fonts to content: Serif for novels, Sans Serif for non-fiction, Monospace for technical books.

Size Selection

Choose a size where you can comfortably read 8-12 words per line without straining.

Background Choice

Use sepia/warm tones during daytime, dark modes with low brightness at night to reduce eye strain.

Lighting Adjustment

Combine background color with device brightness for optimal comfort in different environments.

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Accessibility Features

The EPUB reader supports various accessibility needs:
  • Large text - Scale up to 24sp for improved visibility
  • High contrast - True black and white options for maximum contrast
  • Custom fonts - Choose fonts that work best for dyslexia or other reading needs
  • Text reflow - Content automatically adjusts to your font and size settings
Text-to-speech and other system accessibility features work with the EPUB reader content.

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