Mentible
An AI book-authoring app for adult self-learners. Structure a topic, generate it chapter by chapter, and compile a polished EPUB3/PDF book — provider-agnostic, with managed keys or your own. Formerly StudyBuddy Q.
What is Mentible?
Mentible is an AI authoring app for adults who learn on their own terms. You describe what you want to understand, structure it as a multi-chapter book, generate the content topic by topic, and compile it into a polished EPUB3 / PDF book — cover and all. The finished book is the product: yours to keep, read offline, and share.
The tagline says it best: Author Yourself. — author the material, and author who you become.
Mentible began life as StudyBuddy Q. It has since been rebranded and spun out as an independent product, distinct from the StudyBuddy school platform.
Books, not chat
Mentible is deliberately books-only. An earlier one-off “Query” mode (generate a single throwaway lesson) was removed once the centre of gravity became authoring a real artifact. There is no open-ended chatbot and no catalogue of pre-built courses — just the focused loop of outline → generate → compile.
Provider-agnostic, your choice of keys
Mentible is not tied to a single AI vendor. It works across Anthropic and the OpenAI-compatible providers (OpenAI, DeepSeek, Qwen, Gemma). Key handling is hybrid: a managed default (a subscription with a metered token allowance, so you just start writing) and an optional bring-your-own-key path for power users who want to pay the provider directly.
Who it’s for
Adults only — self-learners and working professionals who want to go deep on a subject at their own pace. It is a standalone tool with no school compliance (no COPPA, no FERPA) and no funnel into the institutional product.
Architecture
- Mobile: React Native with Expo — iOS, Android, and web from one codebase
- Backend: FastAPI — the scoped-query generation engine behind every chapter
- Compiler: a TypeScript pipeline that renders generated content into EPUB3 / PDF artifacts with real covers, a template + theme system, and a release lifecycle (draft watermarking → published)
- Delivery: the compiled book is the deliverable, read in a separate free, offline reader app
Status
Actively in development. The mobile authoring app (library, real EPUB covers, book import/export) and the compiler (theming, covers, watermarking) are taking shape; accounts, metering, and the managed-key path are the MVP focus. The Mentible name is the chosen brand, pending final trademark and domain clearance.
Relationship to StudyBuddy OnDemand
Mentible and StudyBuddy OnDemand are independent sister products. OnDemand is the institutional B2B platform for schools; Mentible is the individual self-learner authoring tool for adults. They share prompt-generation IP via one-way vendoring — nothing else.