Changelog

First Conversion

• Upload a PDF on your first visit and create a free 40-page sample in Lite mode
• Leave the page after the upload creates a task while conversion continues in the background
• See a clear completed state when the free sample is ready, then read it online or download it
• Learn about Pro Workspace page review, chapter editing, and style controls after reviewing the sample

Unlocking the Full Conversion

• Estimate the credits for remaining pages from the sample's actual usage, with a system baseline when usage data is incomplete
• See the remaining pages, estimated credits, current balance, and credit shortfall together
• Get a subscription recommendation that covers the conversion while keeping a one-time credit option available
• Return directly to the original task after checkout and see payment confirmation, balance status, and the next action
• Continue the full conversion from the task page when the current balance is sufficient

Reading & Interface

• Follow the site theme in the online reader by default and save a separate reader theme only after an explicit choice
• Improved reader-page layout so site navigation does not interrupt focused reading
• Refined dark-mode styling in the free-sample unlock panel
• Added EPUB preview tracking to help us keep improving the reading experience

Reliability & Clarity

• Stop the unlock flow when a continuation estimate is unavailable and provide a recalculation action
• Aligned Lite, Pro, and Ultra mode names and credit-estimate explanations
• Clarified the difference between subscription credits, one-time credits, and their related benefits

Free Sample & Pricing

• Increased the free sample from 30 to 40 pages
• Unified displayed prices and checkout prices through a shared regional catalog
• Prevented duplicate subscriptions to the same plan

Settings & Site Experience

• Moved cookie controls into Settings so privacy choices are easy to revisit
• Improved cookie controls around mobile tab navigation
• Added configurable, localized homepage notices
• Improved blog navigation and tag layouts on mobile
• Reduced unnecessary task-status polling when pages are inactive

Security

• Added admin session management with session visibility and revocation
• Blocked unwanted inbound support-email domains
• Hardened mobile authentication, upload sessions, and idempotent API requests

Search & Analytics

• Improved shared consent-aware page tracking and blog signup attribution
• Added IndexNow notifications across public sites for faster search-engine discovery
• Refined structured data and content metadata across localized public pages

Privacy Controls

• Added revocable cookie preferences so analytics consent can be changed at any time
• Updated privacy and data-retention disclosures to match product behavior
• Ensured analytics starts and stops in response to the current consent choice

Performance & Reliability

• Added real-user Core Web Vitals monitoring to track page performance
• Reduced database connection data transfer and Supabase pooler egress
• Reduced unnecessary agent logs and finalizer queries during EPUB optimization
• Guarded final EPUB downloads while optimization is still in progress

Search & Routing

• Aligned sitemap entries, prerendered pages, and localized alternate links
• Added real HTTP 404 responses for unknown public routes
• Centralized route metadata and strengthened structured-data consistency
• Improved blog language alternates, keyword ownership, and SEO interaction tracking

Agent Optimization

• Added a post-conversion agent stage that automatically inspects and improves generated EPUBs
• Extended optimization to free-sample EPUBs
• Added optimization status, diagnostics, and job details to task and admin views

EPUB Quality

• Added build-time quality warnings to help identify structural issues
• Filtered repeated running headers that were incorrectly detected as chapter titles
• Cleaned OCR page-boundary artifacts before chapters are merged
• Added reader watermarks for free-sample EPUBs

Security & Reliability

• Made free-sample eligibility consumption atomic to prevent duplicate use
• Strengthened direct-upload PDF validation, file-key trust, and task-creation rate limits
• Fixed interrupted free samples being mistaken for paid conversions
• Prevented rolling deployments from starting duplicate work for tasks still running on older workers

EPUB Optimization

• Added automatic EPUB optimization after conversion
• Displayed optimization count and latest optimization time on task cards, history, and task details
• Persisted continuation intent so paused or sample tasks resume with the correct conversion settings
• Used paid-account status to present advanced settings more accurately

Invitations & Feedback

• Invitation-code rewards can now grant a free-sample conversion
• Added Telegram and email alerts for negative conversion feedback so issues can be addressed sooner
• Added GLM-OCR endpoint management for more reliable OCR capacity

Scanned PDF Support

• Added a dedicated scanned-PDF-to-EPUB guide in all 7 interface languages
• Added FAQ structured data, prerendering, sitemap coverage, and footer links for the new guide
• Published practical PDF-to-EPUB tutorials for macOS, mobile, and Windows

Conversion Access

• Added paid-account eligibility checks for Pro and Ultra modes
• Added minimum credit checks before creating paid conversion tasks
• Updated homepage guidance so mode availability and requirements are clearer

Email Communication

• Added a centralized email marketing and template management system
• Added sender selection, user segmentation, unsubscribe support, and campaign delivery controls
• Introduced send-rate limits and resilience improvements for more reliable email delivery

Account & Task Experience

• Refined the sign-in interface and validation feedback
• Added internal records for EPUB downloads and optimization runs to improve task support and diagnostics

Free Sample Experience

• Reduced the first-conversion paywall and clarified the free-sample option for new users
• Improved free-sample credit estimates and task-detail cost breakdowns
• Added direct credit-purchase guidance when a full conversion needs more credits
• Fixed continuation of sample tasks so the remaining pages use the complete conversion pipeline
• Added a credit eligibility check before continuing a free sample

Conversion Feedback

• Added a feedback component to completed tasks so users can rate conversion results
• Added feedback review and aggregate statistics for the support team

Navigation & Notifications

• Added deep links from notification emails to relevant task pages
• Fixed localized links and SPA fallback routing to avoid broken or misleading 404 pages
• Improved sitemap and indexing rules for private and public routes

Content-Aware Typesetting

• Added content recognition for more accurate EPUB styles and layout
• Improved detection of headings, paragraphs, and structural context during OCR and chapter merging
• Preserved bold and italic emphasis from source documents
• Added language-aware indentation rules for more natural typography

Notes & Reading

• Improved note links so supported EPUB readers can display notes as popups
• Refined shared EPUB styles for more consistent output across readers

Discoverability

• Added English and Chinese device guides for Kobo, Apple Books, and BOOX
• Improved SEO and sitemap coverage across the main, blog, and free tools sites
• Added conversion-flow event tracking to better identify usability issues

Support

• Added Telegram as a support option from the conversion interface
• Added Telegram notifications for incoming support emails so requests can be handled faster

Language Support

• Added Lithuanian as a document translation target
• Updated language detection and translation selectors across the conversion flow

Reliability

• Fixed missing subscription-status records from Creem webhooks
• Refined landing-page content and SEO metadata

Conversion Quality

• Improved Simplified and Traditional Chinese processing throughout Markdown and EPUB generation
• Fixed OCR text extraction errors and strengthened EPUB structural integrity
• Preserved colophons when chapter batches are merged
• Improved footnote recognition and formatting during Markdown generation

Online Reader

• Added one-time authorization codes for seamless sign-in to the online EPUB reader
• Kept the built-in reader as a fallback when the external reader is unavailable

Experience & Billing

• Added PDF compression guidance when uploaded files exceed the size limit
• Added one-click copying of task IDs from task details
• Improved subscription upgrade handling and corrected upgrade credit calculations
• Removed obsolete Paddle payment paths