LingRoll lite vs Koham

LingRoll brings reading and listening together with flexible ebook layouts, rich TTS tools, and practical file management. Detailed Features 1. File Support • Supports TXT, DOC, DOCX, EPUB, MOBI, AZW3, PDF. DRM-protected files are not supported • Auto-detects text encoding and supports manual encoding selection • Extracts encrypted or unencrypted RAR, ZIP, and 7Z archives • PDF text extraction and OCR for scanned documents • Import via iTunes File Sharing, iCloud Drive, or WiFi transfer 2. Listening • Built-in iOS TTS voices • Narration and dialogue detection with separate voices • TTS text replacement for pronunciation, terms, and symbols • Long-paragraph optimization for smoother playback • Auto skip trailing silence • Custom background music, speed, pitch, and volume • Sleep timer • Listen while reading, scroll freely, or follow the playing paragraph • Home screen display during background playback • Progress styles: highlight, underline, line-by-line highlight, sentence underline • Headphone controls and custom lock screen display • Pre-download full-book audio 3. Reading • System fonts and custom font installation • Adjustable spacing, margins, first-line indent, hanging indent, and more • Custom background image with optional scroll-follow effect • Custom themes with RGBA colors • Chinese conversion between Simplified, Traditional, Hong Kong Traditional, and Taiwan Traditional • Tencent Translation API support • Auto scroll/auto page turn with adjustable speed • Auto reading modes: pixel scroll, line-by-line display, sentence underline • TOC parsing for TXT, EPUB, MOBI, and AZW3 • Original annotation display for EPUB/MOBI/AZW3 • Portrait and landscape layouts, rotation controls, and a page-curl option 4. Bookmarks and Notes • Categorized bookmarks • Notes with underline, wavy line, dashed line, double strikethrough, redaction line, border, and background color • Custom color for each note • Tap bookmarks or notes to jump • Export notes as Markdown or TXT 5. File Management • Real folder-based book management • Sort by name, size, date, type, or reading duration • Pin files and set folders to top, bottom, or hidden • Read covers from EPUB/MOBI/AZW3, or update via web search/photos • Rename files using built-in book titles • Search files, folders, and full text while reading • Recent imports for quick access • Browse WebDAV folders; upload from your library or iCloud; download to a chosen folder • Batch download/delete, rename, and move remote items 6. Format Conversion • Convert EPUB/MOBI/AZW3/PDF to TXT • Convert TXT to EPUB • Supports Chinese conversion and encoding selection • Preserves original TOC structure 7. Statistics • Daily reading/listening duration • Reading heatmap • Book progress 8. Security • Password and Touch ID/Face ID protection 9. Migration and Sync • Export/import reading history and personal settings • Export single or multiple themes • Add multiple WebDAV accounts and choose the active account • Sync the latest 100 reading records; choose a sync frequency or manual sync • Prompt to jump to a newer reading position from another device • Reading sync excludes books; transfer them with WebDAV file management Lite vs. Pro: The following features require Pro: • Microsoft Azure/Edge and MiMo TTS • Narration/dialogue detection and separate voices • Language-aware voice selection • TTS audio export • Offline TTS duration stats • Optimized long-paragraph playback • Automatic trailing-silence skip • Custom listening background music • Line-by-line highlights and sentence underlines • Font import and installation • TXT-to-EPUB conversion • Chinese conversion (Simplified, Traditional, Hong Kong, Taiwan) • Text translation and Tencent Translation • Reading statistics • Password and Touch ID/Face ID protection • WebDAV sync and file management • Backup/import of reading history, personal settings, theme colors

After you finish a book, how much of it actually stays with you? Koham offers a different path: talk to your books instead of merely reading them. Import a book. Start a conversation. Back and forth, unhurried, like a late-night walk or an intimate chat in a quiet study. Koham will not help you speed-read, nor will it help you memorize more. It does one thing: it lets you converse with your books through AI, so that in the exchange, you come to know yourself. When true understanding arrives, you never forget. What you seek, you already are. --- Core Experience • Talk to Books: Ask any book what truly matters to you. Every response is grounded in the text. • Realtime Voice: Like calling an old friend. Speak, listen, interrupt, or simply pause in silence. • Your Bookshelf: Import your personal collection. Every book feels like an old friend. • Calm Reading: A quiet EPUB reader. Customize fonts, themes, and brightness as you like. • Thought Continuity: It remembers past discussions so you can pick up next time. View, edit, or delete memories anytime. --- Please Note • Koham does not include books. Please import your own EPUB files. • AI conversations require configuring your own API key in Settings, with step-by-step guidance in the app.