Feature walkthrough
Eleven core flows, each with a real screenshot from the running app.
Authentication & accounts
Register → confirm email → sign in with a short-lived JWT access token and a rotating refresh token with reuse detection, plus forgot/reset password. Repeated failed logins trigger a temporary account lockout.
Course catalog & enrollment
Guests can browse the catalog and the list of free exercises without an account. Once enrolled, content is gated by three tiers — Free / Standard / Premium — enforced on the API, not just hidden in the UI.
Studying lessons
A course is a chapter → topic → lesson tree, built from several content-block types. Students filter by difficulty and see how much of the program — 9 chapters, 61 lessons in this example — they've completed.
Exercises & tests
Pick an exercise, and every answer autosaves as the student navigates the question grid — so they can leave and resume later. Practice mode runs untimed; tests run a clock, and tab-switching is logged to deter cheating.
AI hints & feedback
A Gemini-powered tutor nudges the student toward the concept — comparing digits place by place here — without revealing the answer outright. Hints are quota-limited per package, and a background queue produces a full mistake analysis after submission.
Student dashboard
One place to see the current study streak, weekly study time, average score, and progress broken down chapter by chapter — plus a shortcut back into recently studied lessons and a nudge toward Premium features.
Parent linking & monitoring
Parents connect to a child via a link code, switch between multiple linked children, and see weekly study minutes, average score, and per-chapter progress — with rule-based notifications for tab-switching, low scores, or inactivity.
Payments & subscriptions
Checkout reuses the pending order and counts down to the QR's server-side expiry. An idempotent SePay webhook confirms payment, a background sweep manages renewal/expiry, and refunds go through a semi-automated flow.
Notifications
An in-app bell plus email covers tab-switch warnings during a test and multi-day inactivity reminders. Students and parents can opt out of each notification type individually.
Content authoring & import
Courses move through a Draft → submit for review → publish workflow. Curriculum, question banks, and exercises can be bulk-imported from CSV/XLSX, with a "validate only" pass before anything actually gets written.
Admin & finance area
System administration covers users, roles, and an audit log. The finance area adds package/pricing management and revenue analytics — gross vs. net revenue, paying customers, ARPU, and a time-series chart — built with Chart.js.