First Book AI vs Kerlig™ AI Writing App for Mac

Comparing the features of First Book AI to Kerlig™ AI Writing App for Mac

Feature
First Book AI
Kerlig™ AI Writing App for Mac

Capability Features

AI Book Agent
Book Credits Additive
Book Structure
8 chapters, 24–32 sections
Built-in Actions
ProofreadWrite Slack repliesChat with documentsFix spelling and grammarImprove writingSummarizeMake shorterConvert to TypeScript interfaceYouTube Script CreatorCareer coachSimplify
Chat History Availability
Chat Interface
Citations in Output
Content Ownership
Custom Actions
Custom Tone of Voice
Document Attachments
Edit Content
Edit Messages
Full-Length Book Generation
Guided Book Creation
Headless Mode
Multi-step Research
Native macOS App
No Training on User Data
On-device Data Storage
Preset Customization
Priority Support Team
Publish on Amazon KDP
Quick Access
Reasoning Models
Regenerate Responses
Roadmap Features
Additional languagesIn-text references & citationsReal-time collaborationAdvanced analytics
Section Editing
Setup Call Included
Shortcuts & Hotkeys
Step-by-step Guidance
Step-by-Step Questionnaire
Support Response Time Team
Within one business day
Priority Zoom & email support
Team Deployment via CLI
Team Use

Integration Features

Attachment Types
DocumentsEbooksImages
EPUB/MOBI Workflow
Export Format
Microsoft Word (.docx)Google DocsPDF (print-ready)
Export to DOCX
Export to PDF
Google Docs Export
Local Model Operation
Apple Foundation ModelsOllamaLM Studio
Multiple AI Provider Integration
Apple Foundation ModelsOpenAIAnthropicGoogle GeminiGroq CloudOllamaOpenRouterx AIPerplexityLM StudioMistralAmazon Bedrock
Number of Supported Models
350
Third Party App Support
SlackJiraEmail (generic)

Limitation Features

API Key Support
Current Languages
English only (as of now)
Limited to Mac Platform
macOS Support
Apple Silicon & Intel, macOS 12+
Manuscript Length Target
≈30k–35k words
No API Access
No Plugin Support
Plagiarism Responsibility
User responsibility
Token Costs Not Included

Other Features

Support Response Time
24h email support

Pricing Features

1 Book Plan
$19 one-time
10 Books Plan
$129 one-time
3 Books Plan
$47 one-time
30-Day Money Back Guarantee
50 Books Plan
$449 one-time
App Updates Period
Lifetime (October Deal) or 1 year
Basic License Price
$49 (October Deal, reg. $247)
Basic License Seats
1
Book Credit Bundles
1 Book – $193 Books – $4710 Books – $12950 Books – $449
Lifetime Updates
No Monthly Fees
No Subscription
No Subscription Required
One Time Payment
Pro License Price
$79 (October Deal, reg. $467)
Pro License Seats
2
Refund Policy Duration
14-day money-back guarantee
14-day money back guarantee
Team License
$297/once
Team License Seats
10