📖 BookFun 2.2 Full Manual

Welcome to BookFun 2.2. Crafted for book lovers seeking the ultimate reading sanctuary, this handbook systematically covers all features from beginner basics to advanced configurations, suitable for offline reference or a complete walkthrough.

📑 Manual Outline

1. I. Quick Start & Library Management
2. II. Reader Typography & Page Turning
3. III. Audiobook & Voice Narration
4. IV. Online Cover Scraping & Golden Ratio
5. V. Multi-Device Sync & Migration Backups
6. VI. Preferences & Storage Maintenance
7. VII. Authentic Reading Time Analytics
8. VIII. Troubleshooting Checklist

I. Quick Start & Library Management

1. Supported Formats & Effortless Ingestion

• Unified Standardized Parsing (Style Normalization):
  • Full support for TXT, EPUB, MOBI, AZW3 (Kindle), DOCX, Markdown (.md), and PDF eBooks and documents;
  • Proprietary Intermediate Format: Automatically parses and converts disparate formats into a clean, uniform intermediate document model upon import;
  • Zero Style Conflicts: Strips away chaotic inline CSS and inconsistent external stylesheets. Page styling is 100% controlled by BookFun’s native rendering engine for uniform typography, line spacing, and color harmony;
• Multiple Import Channels:
  • Tap the ”+” button on the bookshelf to batch-import from files;
  • Select “Open in Another App” -> “BookFun” in Safari, messaging apps, or Mail;
  • Receive book files instantly via AirDrop;
• Duplicate Name Options:
  • Keep Both (automatically appends an incrementing counter e.g. Three-Body (1));
  • Replace & Overwrite (preserves existing progress, bookmarks, and notes);
  • Skip Duplicate, with automated alerts blocking 0-byte corrupt files.

2. Dual Bookshelf Views, Deep Search & Folder Grouping

• 3D Skeuomorphic Shelf: 3-column grid featuring real spine thickness, lighting reflections, and soft shadows;
• Compact Detailed List: Single-column view displaying title, author, size, progress percentage, and last reading date;
• Deep Search Across Folders:
  • Search by book title or author in the bookshelf to instantly reveal matching books laid out flat, regardless of how deep they are nested inside folders;
  • Search results display subtle folder badge pills (e.g. 📁 Sci-Fi), with one-tap instant opening and support for batch selection, deletion, or moving;
• 2x2 Group Folders:
  • Displays a stacked preview of 4 internal book covers, updating automatically with collection changes;
  • Tap once to smoothly expand into a dedicated second-level bookshelf;
• 5 Sorting Orders: Sort by import time, reading time, title, update time, or reading progress in ascending / descending order;
• Long-Press Management Card: Long-press any book for comprehensive actions: cover scraping, pinning to top, folder relocation, rating, and status tagging;
• Markdown Column Authoring: Create standalone Markdown books directly from your shelf, organize volumes, and compile them into EPUB eBooks with one tap.

3. Data Safety: Un-grouping, Hiding & Deletion Safeguards

• Remove from Group: Safely returns the book to the main bookshelf root without touching file contents or progress;
• Hide Book: Visually hides the book from the main shelf. Reveal anytime by toggling “Show Hidden Books” in the top menu;
• Standard Deletion (Default): Deletes cached illustration files and eBook binaries to free storage, while fully preserving your reading progress, bookmarks, annotations, and reading time; re-importing the same book later restores everything automatically;
• Permanent Purge: Enable “Permanent eBook Deletion” in Settings to wipe all associated notes and analytics upon book removal;
• Format Independence: Having both TXT and EPUB versions of the same book on your shelf ensures deleting one will never impact the other.

II. Reader Typography & Page Turning

1. Publication-Grade Typography

• Natural Paragraph Indentation: Paragraphs start with proper full-width character indentations;
• Punctuation Boundary Protection: Commas, periods, and closing quotes are never stranded at the start of a line; opening brackets never linger at line ends;
• Orphan Word Elimination: Prevents single lingering words from spilling onto empty lines;
• Justified Margins: Balanced micro-spacing aligns both margins cleanly, mirroring real printed literature.

2. Smooth Gestures to Match Your Style

• Horizontal Sliding Transitions: Gentle horizontal swipes transition pages smoothly without motion blur or visual fatigue;
• Continuous Vertical Scrolling: Infinite stepless vertical scrolling lets you scroll at your own pace—ideal for quick skimming or web novel binge-reading.

3. Zero-Pause Chapter Transitions

• Next chapters are pre-rendered in the background well before you reach the end of the current chapter;
• Turning past the last page of a chapter transitions seamlessly into the next chapter without lag or loading spinners.

4. Table of Contents, Full-Text Search & Sticky Volume Headers

• Sticky Volume Headers: When scrolling through long novels, the active volume title sticks to the top for easy orientation;
• Instant Full-Text Search: Search any keyword across the entire book in seconds, with match counts per chapter and instant jumps to sentences;
• Highlights & Thought Notes: Highlight text in multiple neon pastel colors and add personal annotations. Export all book notes to Markdown with one tap.

5. 3-Dimensional Highlight Colors & Custom Palettes

• Distinct Colors for Every Action:
  • Text Selection: Automatically adapts to your book page background (Parchment Brown, Eye-Care Bamboo Green, Deep Night Black, Classic Paper White);
  • Full-Text Search: High-contrast bright yellow to immediately spot keywords;
  • Audio Narration: Vibrant animated orange following the active spoken line;
• Color Picker & Reset: Access “Highlight Color Settings” in Preferences to pick custom shades or reset to recommended official defaults with a single tap.

6. Smart Proofreading: Instant Millisecond Page Refresh

• Highlight to Proofread: Long-press text and tap “Proofread”—the selected passage automatically fills the rule name to save typing;
• Instant Page Re-layout: Saving a proofreading rule refreshes and repaginates the active reading page in milliseconds, eliminating the need to exit and re-enter the reader;
• Dynamic Radar Scanner: Full-book batch proofreading features a vibrant radar scanning animation and real-time chapter progress bars, keeping you informed at every step.

7. Explore Without Losing Your Place: “Return” Floating Capsule

• Reading Anchor Freezing: Jumping across chapters via TOC or footnotes preserves your original reading position in background memory;
• Interactive Capsule:
  • Tap “Return”: Jumps straight back to your original spot;
  • Tap “Stay Here”: Sets your current location as your new primary reading progress;
• Auto-Advance After 3 Pages: Turning 3 or more consecutive pages in the new location automatically adopts it as your primary progress;
• Safe Exits: Exiting the reader without choosing returns you to your original place on your next visit, protecting your primary progress.

8. Adaptive Image Scaling & Eye Comfort

• Adaptive Illustration Scaling: Large images scale proportionally to available page height without spilling past screen edges;
• Dynamic Header Height Calculations: Regardless of font size or heading length, ample margin is preserved so headings never clip body text;
• 4 Classic Eye-Care Palettes: Parchment (warm retro), Eye-Care Green (fatigue-free), OLED Pure Black (battery-saving), and Minimal White;
• Anti-Blue Light Color Temperature: Dynamically adjusts warmth to filter high-energy blue light, combined with deep software dimming.

III. Audiobook & Voice Narration

1. Offline Device Voices & Natural Cloud Narrators

• Built-in Offline Voices (Siri, etc.): Zero data usage, ultra-low power consumption, perfect for Airplane Mode;
• Natural Cloud Narrators: Connect to network to unlock lifelike, professional broadcast-quality AI voices in multiple genders and accents;
• Seamless Reconnect Recovery: If an offline interruption temporarily drops you to local speech, BookFun automatically switches back to high-fidelity AI voices the moment network restores;
• Background Pre-Buffering: Audio streams buffer ahead while listening, ensuring transition between chapters is smooth and uninterrupted.

2. Natural Phrasing & Conversational Cadence

• Short dialogues between characters read continuously without awkward pauses;
• Longer passages break naturally at commas and periods with organic melodic inflections;
• Spoken sentences are highlighted in synchronized animated orange.

3. Draggable Floating Audio Capsule

• Moving to the bookshelf or other tabs surfaces a sleek floating mini player at the screen edge;
• Drag the capsule freely anywhere across the screen; it snaps smoothly to edges while dodging interactive buttons;
• The capsule features a circular progress ring: tap once to play/pause, tap center to open the full control board.

4. Smooth Follow-Along Viewport & Double-Tap to Play

• Reading pages scroll smoothly so the active highlighted sentence rests in the center of your field of view;
• Double-tap any sentence on the page to start narration immediately from that exact spot.

5. Fine Speed Controls, Sleep Timer & Symmetric Controls

• 0.5×–3.0× Continuous Speed Tuning;
• Sleep Countdown Timer: Select 15/30/45/60 minute presets. The final minute switches to a precise second-by-second countdown, fading audio gently over the last 10 seconds;
• Symmetric Control Bar: Speed, timer, and close buttons are symmetrically aligned for clean layout without awkward wrapping;
• Energy-Saving Release: Exiting audio narration immediately shuts down background network streams to preserve battery;
• Sentence-Level Memory: Resuming playback starts precisely at the exact sentence where you left off;
• Lock Screen & Headphone Controls: View book covers on lock screen; use standard headphone clicks to play, pause, or skip chapters with built-in accidental double-click protection.

IV. Online Cover Scraping & Golden Ratio

1. Multi-Engine Cover Search

• Baidu Images (exceptional hit rate for web novels), Bing (pristine backgrounds for literary classics), and Google Images (broad international coverage);
• Adjust engine search priorities or turn off scraping completely for a 100% offline experience.

2. Automated Title Noise Cleaning

• Automatically removes HTML entities like &;
• Strips noisy prefixes like "Author:" and suffixes like "[Complete Edition]", "[TXT Download]", delivering pure search queries with doubled accuracy.

3. Golden Ratio 0.72 Centered Cropping

• Adheres to standard hardcover publishing proportions (width / height = 0.72);
• Any selected artwork is automatically centered and cropped to ensure every book on your shelf stands in harmonious alignment without stretching.

4. Photo Library Selection & Embedded Cover Extraction

• Pick high-res images directly from your photo library;
• Automatically extracts official embedded covers when importing EPUB or Kindle eBooks.

V. Multi-Device Sync & Migration Backups

1. Effortless Apple Multi-Device Sync

• Sign in with your Apple ID and enable iCloud across iPhone, iPad, and Mac: progress, bookshelf structure, and notes sync silently in the background;
• Data is stored securely in your private iCloud container with 100% privacy.

2. Cloud Drive Sync & Serial Tracking

• Connect to home NAS drives or Baidu Netdisk with credentials securely stored in iOS Keychain;
• One-Tap Connection Diagnostics: Test cloud drive reachability instantly in the settings panel and assign friendly aliases;
• Browse cloud folders directly within BookFun to import books to your shelf;
• Automatically checks for new chapters when files update, displaying a subtle notification badge on the book cover.

3. Seamless Migration Package

• Export your entire library of original eBook files, complete with all metadata and 3D cover art;
• Generates a cleanly named zip archive (e.g. bookfun_v2_2_20261102_1200.zip), ready to AirDrop to your new phone for one-tap ingestion.

4. Fast Lightweight Local Backups

• Zero Storage Bloat: Compact backup size avoids unnecessary disk usage;
• Customizable Backup Scope: Choose to back up books, reading notes, preferences, or reading statistics individually;
• Fault-Tolerant Processing: Corrupted files are safely skipped without halting the backup process;
• Overwrite Warnings: We recommend generating a fresh backup of your current device before restoring an older archive to prevent accidental data loss.

VI. Preferences & Storage Maintenance

1. Cohesive Appearance & Reader Themes

• Supports System Default, Minimal Light, and Immersive Dark themes;
• Screen darkening automatically switches book pages to comfortable dark tones, while brightening restores warm parchment;
• Page turn sound effects and subtle haptic feedback can be toggled freely.

2. Bookshelf Customization & Fluid Scrolling

• Choose whether to display reading progress percentages and unread chapter counts beneath book covers;
• Enjoy fluid, stutter-free 60/120fps scrolling regardless of how many books you collect.

3. Cache Cleaning & Database Health

• One-Tap Cache Cleaner: Safely clears temporary cover search candidates and unzip caches without affecting your original eBooks, progress, or notes;
• Automatic Health Check: Performs a lightweight integrity check on cold launch; rebuild search indexes anytime to keep responsiveness razor-sharp.

VII. Authentic Reading Time Analytics

1. De-Duplicated Real-Time Intervals

• When reading and listening to the same book simultaneously, the system uses time interval unions to calculate authentic reading spans, eliminating inflated double-counting; daily reading is strictly capped at $\le 24$ hours;
• 3-Minute Inactivity Pause: Stepping away or falling asleep automatically pauses timers, resuming only when you turn the page.

2. Total Reading Days Dashboard

• Profile tab highlights your cumulative “Reading Days” milestone with clean, compact typography;
• Tap the card to jump straight to your bookshelf, helping you visualize your reading consistency.

3. Daily Reading Treemap

• Books read today appear as colorful building blocks—titles you spent more time with occupy larger blocks. Tap any block to review exact reading timeframes;
• Switch effortlessly between Day, Week, Month, and Year overviews.

4. 3D Book Reading Archives

• Each book features an interactive 3D cover card, displaying total word count, progress milestones, and reading vs. listening bar charts;
• Estimates remaining reading time and charts your 7-day reading enthusiasm curve.

VIII. Troubleshooting Checklist