AI signature designer with 30+ celebrity styles personalized to your name
AI writing critique tool for serious authors
Stage
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Founded
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Based in
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Pricing model
Free
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Pricing
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Core Plan: $19/month (200,000 words of editing per month, limited rewriting ability). Pro Plan: $29/month (300,000 words of editing per month, able to rewrite entire chapters and books). A one-time free word sample is available for new accounts.
Key features
Over 30 celebrity-inspired signature styles
Signature analysis on five dimensions
AI-generated personalized signatures
Step-by-step animated learning tutorials
Practice tool with scoring
Signature style quiz
Support for 21 languages
Before-and-after signature comparison
Sentence-level literary feedback
Paragraph-level literary feedback
Passage-level literary feedback in context
Chapter-level literary feedback in context
Book-level literary feedback in entire context
One-click text rewriting with AI
Entire chapter rewriting on Pro Plan
Entire book rewriting on Pro Plan
300,000-word context window on Pro Plan
Progressive learning through interactive Q&A
What makes it different
Hand-writable signatures, not just digital fonts
Designs created in minutes instead of days
Step-by-step teaching breaks signatures into maximum 8 steps
Human book editors charge thousands but AI Book Editor starts at $19 per month
Gives almost immediate feedback while human editors take weeks
300,000-word context window three times more than average novel
All output belongs 100% to the user for commercial use
Calligra Signature
AI Book Editor