Daily unique users with at least 1 review event - new vs returning
Unique users are split into new reviewers on their first review day and returning reviewers who reviewed before. A review means choosing Again, Hard, Good, or Easy on a card.
Open-source flashcards app with spaced repetition, passwordless auth, AI chat, and an agent-ready onboarding flow. Use the hosted web app today, connect Claude Code, Codex, or OpenClaw through one discovery URL, and keep web, iOS, and agent workflows on the same backend model.
Share this discovery URL with your AI agent. It can sign up, create your account, and manage your Flashcards workspace for you.
Start with GET on this discovery URL:
https://api.flashcards-open-source-app.com/v1/APP PREVIEW

Public Activity
A simpler build-time snapshot of public review activity. Metrics cover the full date range; charts show daily unique users and review events by platform.
Total review events
4,112
Users with review events
46
Days in range
61
Peak daily volume
442
Peak daily unique users
13
Unique users are split into new reviewers on their first review day and returning reviewers who reviewed before. A review means choosing Again, Hard, Good, or Easy on a card.
A review means choosing Again, Hard, Good, or Easy on a card. This chart shows review events by platform.
Review cards with FSRS scheduling and a simple rating flow. The backend and iOS client keep the scheduler behavior aligned.
Create cards, browse your collection, review due items, and work with AI chat plus file attachments in the hosted web app.
Email OTP via Cognito with shared-domain cookies across the auth and app subdomains.
Give an AI agent the discovery URL, confirm the latest 8-digit email code, and let it finish login, API key setup, account loading, workspace selection, and SQL discovery.
Run Postgres locally, start auth, backend, and web separately, and keep the AWS deployment path under your control.
The repository already includes the iOS app with local SQLite and sync, and the Android app is now available on Google Play.