longbook
A financial memory for your AI. longbook keeps your recurring money — subscriptions, insurance, EMIs, school fees, domains, renewals — as a meticulous, machine-readable memory that the AI you already use can read, fill, and build on. Your AI gathers from your statements and emails; longbook remembers, checks, and shows you every change for approval.
- Native apps for iPhone and Mac (SwiftUI), one $38 purchase with a 7-day refund, one purchase unlocks every platform; longbook Cloud, $4 a month, covers what uses the server.
- Your data is a folder of plain files you own — self-describing (
llms.txt+ a JSON Schema), synced through your own iCloud Drive. - Designed so it cannot hold secrets: no card numbers, no CVVs, no credentials — the schema and validators refuse them, which is what makes everything else safe.
- Connects to your AI over MCP — locally for desktop AI apps, hosted for ChatGPT and phones.
Site: longbook.app · Contact: contact@longbook.app
Status
The domain engine (packages/core), the Swift data layer (packages/swift-core), the
accounts and entitlements backend (supabase/) and the native app (apps/longbook) are
all in place; the app runs on both platforms and ships through App Store Connect. Docs
describe what exists today.
Layout
| Path | What it is |
|---|---|
packages/core |
The domain engine — dates, money, selectors, insights, the data-policy scanner; pure TypeScript, no runtime deps |
packages/swift-core |
The same data layer in Swift, as a multiplatform package (iOS 17+, macOS 14+) shared by both app targets |
packages/swift-design |
The design system — colour, type, spacing, and the SwiftUI pieces both apps draw with |
packages/mcp |
The MCP server — the memory's read and write tools over stdio for the AI on the owner's machine, and the engine behind the hosted twin at longbook.app/mcp, which reads the pushed copy and takes writes as proposals |
packages/cards |
Self-contained HTML cards over the same numbers — the design system's tokens, exported once, feeding a second renderer |
supabase/ |
Accounts, trial clock, entitlements, purchases, the hosted MCP and hosted copy, statement reading, report sharing |
apps/longbook |
The native SwiftUI app — one target building for iOS and macOS, with the Home Screen widget |
apps/longbook-site |
The static site at longbook.app — the pages, the guide and schema at stable addresses, and the edge functions behind /mcp and shared reports |
docs/ |
Architecture · Vault format · Agentic tools · Building · Contributing |
License
GPL-3.0. Copyright © 2026 Rohit Kundliwal. Contributions are accepted under the licence grant in contributing. The longbook name and mark identify this project's own releases.