Rewrite or reply to your messages before you send them, choosing from safer, funnier, or custom tones
AI book writer for non-fiction and poetry
Stage
Startup
MVP
Founded
Not given
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Based in
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Pricing model
Freemium
Freemium
Pricing
Free: $0 forever for on-device rewrites with unlimited rewrites, no account required. Pro: $3.99/month or $39.99/year; new subscribers get a 14-day free trial and can cancel anytime.
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Key features
Safer tone that clarifies and reduces hostility
Funnier tone that changes register
Custom tone by typing your own instructions
Cloud rewrites for Pro subscribers
How I Sound feature to apply your voice to rewrites
Support for longer drafts on Pro
Works in iPhone keyboard and as an app
AI-powered content generation
Multilingual support
Amazon KDP-ready formatting
Automatic structure and outline generation
Quick book generation
Intuitive user interface
Multiple book type support
Export in DOCX and PDF formats
What makes it different
Never sends messages automatically—you always copy and send manually
Drafts never used to train models; privacy-first design
Free on-device rewrites with no daily limits or quotas
Works directly in iPhone keyboard for seamless workflow
Create complete books in minutes without writing a single word
AI handles everything from idea to polished manuscript
Full commercial rights to generated content
Instantly ready for KDP and other platforms
Scale production to generate multiple titles quickly
tono
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