Interactive storytelling platform where you play, create and share stories in beloved worlds
Stage
Not given
Established
Founded
Not given
2020
Based in
Not given
US
Pricing model
Freemium
Freemium
Pricing
Not given
Free tier includes unlimited play across all worlds, character chat, and personal profile. Creator plan available for creating and sharing custom worlds (price not specified on pricing page).
Key features
Spaced repetition with FSRS algorithm
Repertoire builder
Opening trainer with instant feedback
Game import from Lichess and Chess.com
Deviation detection
Course library with opening courses
iOS and Android mobile apps
Multiple language support
Interactive fiction gameplay with branching narratives
Character chat and side conversations
Atlas world-building studio
Licensed worlds from film and publishing partners
Modifier cards for story customization
Private and public world sharing options
Creator API for building custom experiences
Hand-drawn art and human-written narrative beats
What makes it different
FSRS algorithm schedules reviews 15-30% more efficiently than SM2
Automatic deviation detection from Lichess and Chess.com games
Full repertoire builder in free tier with no course purchase required
Protects creator IP and never trains models on partner content
Narrative world model ensures canon compliance across all player stories
Human-created narrative beats and art paired with specialized AI
Transmedia experience combining fanfiction, RPGs and social gameplay
Small tuned models that outperform larger general models on narrative tasks
ChessAtlas
Hidden Door