Changelog

AI Image-to-Vector Studio, Smart Line Art Coloring Engine, BYOK Studio & Paddle V2 Instant Fulfillment.

• NewAI Image-to-Vector Studio: convert raster sketches and drawings into 300 DPI resolution-independent vector paths.
• NewSmart Line Art Coloring Studio: generate high-definition crisp line art for coloring books with Flux and Gemini engines.
• NewEnterprise BYOK (Bring Your Own Key) Engine: connect personal OpenAI or Gemini API keys for unlimited AI generations with zero platform markup.
• NewPaddle V2 Checkout Integration: seamless instant overlay checkout, tiered lifetime deals, and automated webhook fulfillment.
• ImprovedUpdated Generative AI Terms of Service guaranteeing 100% IP ownership and commercial publishing rights on Amazon KDP.

10+ new puzzle engines, auto solution key formatter & multi-marketplace voucher redemption.

• New6 new puzzle studio engines launched: Slitherlink, Nonogram (Picross), Calcudoku, Nurikabe, Missing Vowels, and Futoshiki.
• NewAutomated Solution Key Formatter: automatically compiles multi-grid answer keys at the back of the book with customizable layouts (2x2, 3x3, 4x4).
• ImprovedPreflight Vector Bleed Engine: guarantees zero upload errors and zero bleed margin rejections on Amazon KDP print checks.
• NewPartner & Marketplace Voucher Redemption System: 1-click instant activation for AppSumo and partner license holders.

Unified Creator Studio workspace, BookBuilder multi-page compiler & dynamic spine formula.

• NewUnified Creator Studio architecture with parallel zero-lag multi-tab canvas stacking for cover and interior editing.
• NewBookBuilder interior layout compiler: reorder, duplicate, insert title/copyright pages, and batch export 300 DPI vector books.
• ImprovedAutomatic spine thickness calculation accurately scaled to exact page count and Amazon KDP white/cream paper stock.
• ImprovedMathematical puzzle seed generation hardened with strict duplicate prevention and guaranteed unique solutions.

Font library expansion to 120+ fonts, 15 Cover Studio gradient presets & AppSumo webhook hardening.

• New120+ curated Google & System fonts across 7 categories in Cover Studio.
• New15 ready-made 1-click background color gradient & designer palette presets in Cover Studio canvas.
• ImprovedAppSumo webhook response messages fully aligned with Partner API specification (enhance_tier, reduce_tier, refund, deactivate).
• ImprovedFontPicker now searches 1,350+ Google Fonts catalog with real-time live previews.
• FixedStudio sidebar header button/badge overlap fixed across Crossword, Cryptogram, Math Puzzle, and Word Scramble generators.

AppSumo 3-Tier alignment, complete AI removal, and team workspace improvements.

• NewAppSumo 3-Tier structure: Tier 1 ($49), Tier 2 ($79), Tier 3 ($149 Max Stack).
• RemovedRemoved all Groq AI SDK references and AI routes to comply with AppSumo Radar non-AI policy.
• ImprovedRate limiting (10 attempts / 10 min) enforced on AppSumo redeem action.
• SecurityAppSumo webhook hardened with timing-safe HMAC secret verification.
• Fixed/generate and /tools/bulk-listing-generator now redirect cleanly to /studio and /tools.

KDP Cover Studio overhaul with Brand Kit, Fabric.js canvas, and Canva-style smart guides.

• NewFull Fabric.js canvas Cover Studio with front cover, spine, and back cover editing in one workspace.
• NewBrand Kit: save custom colors and font presets per user account.
• NewCanva-style smart snapping alignment guides for precise object positioning.
• NewCurved text tool and Photoshop-style layer blend modes for cover elements.
• Improved300 DPI vector-accurate PDF export for both cover and puzzle interiors.
• ImprovedTemplate Gallery Modal with 14 professionally designed cover templates.

Shape-masked mazes, Kakuro puzzles, Cryptogram studio, and CSV bulk word import.

• NewShape-masked Maze generator: Heart, Star, Diamond, Circle, and Square masks.
• NewKakuro puzzle generator with adjustable difficulty and grid sizes.
• NewCryptogram Studio with custom quote import via CSV/TXT and cipher modes.
• NewCSV/TXT bulk word list import across all puzzle engines.
• NewGuided 1-click onboarding tour for all studio generators.

30+ free KDP tools launched with no signup required.

• NewSpine Calculator: automatic spine width computation by page count and paper type.
• NewRoyalty Estimator: real-time Amazon KDP royalty calculation.
• NewISBN Generator, QR Code Generator, Keyword Research, and 25+ additional KDP utility tools.
• NewColoring Book Generator, Word Cloud, Grammar Checker, OCR Scanner, and PDF Compressor.
• ImprovedAll 30+ tools accessible without login — completely free tier, no account required.

Bulk Puzzle Book Generator, Sudoku engine, and Notebook save system.

• NewBulk Puzzle Book Generator: 10–200 page puzzle interiors in one click with solution keys.
• NewSudoku engine with Easy, Medium, Hard, and Expert difficulty.
• NewNotebook system: save and reload any generated puzzle book project.
• NewTeam Workspace: invite members and share Notebook projects across accounts.
• FixedWord Search grid sometimes missing words at hard difficulty — backtracking algorithm improved.

KDPage public launch — Word Search, Crossword, and Math Puzzle generators.

• NewWord Search Generator with 10x10, 12x12, and 15x15 grid sizes and 8-directional word placement.
• NewCrossword Puzzle Generator with custom word + clue pairs and auto-layout engine.
• NewMath Puzzle Generator with addition, subtraction, multiplication, and division modes.
• NewUser authentication via Clerk with Google OAuth and email/password.
• NewPaddle payment integration and KDPage public website with pricing, blog, FAQ, docs.