Free: 100 welcome credits. Plus: US$29/month with 1,000 credits per month. Pro: US$59/month with 4,000 credits per month. Max: US$99/month with 10,000 credits per month. Yearly option saves 2 months (one payment for 10 months of the monthly price).
Free: 4,000 daily credits (approximately 2-3 emails per day), or 30-day Premium trial. Premium: $9.90/month (unlimited emails) or $81.90/year (25% savings).
Key features
Write from documents, notes, talks, recordings, or ideas
Support for 100+ languages
Multiple input formats including PDF, Word, MP3, MP4
AI-powered chapter writing
Built-in editor with chat interface
Export in multiple formats: DOCX, EPUB, PDF, HTML, KDP pack
Cover and illustration generation
Specialized book skills for memoir, novel, biography
Unlimited web search for research
Unlimited book storage
Analyzes incoming emails and generates personalized response suggestions
Adjusts tone based on context and intention
Smart mode requires minimal input from user
Works with Gmail and Outlook
Chrome extension integration
Supports email creation from scratch with context input
Daily credit system for free users
What makes it different
You retain full ownership and commercial rights to your finished book
Content not used to train AI models
Start writing with just a sentence or bring complete materials
Free tier includes 100 credits with no card required
All-in-one workspace from drafting through publication
Specialized focus on professional email writing rather than generic AI writing
Context-aware and context-specific response generation
Booova
Scribbly