Umikora PRD

Summary

Mobile learning app with Anki-style spaced repetition for nonfiction, textbooks, and exam prep. Content organized as Modules (with Chapters) and Pathways with Duolingo-like engagement and RPG-style radar stats.

v0.1 scope (shipped — offline MVP)

• Offline SQLite + bundled content pack (official-v1.json)
• Study list, review sessions, SM-2 scheduling
• Six-axis radar profile, streak, XP/level
• Freemium limits simulated via three mock subscription tiers (no RevenueCat):
  • 探索者 (free) — 2 study-list items, 10 new cards/day
  • 學者 — HK$38/mo or HK$298/yr — 5 items, 30 new cards/day
  • 哲人 — HK$78/mo or HK$598/yr — unlimited items and new cards
  • Users tab: view current tier, mock subscribe/upgrade with Alert confirm
  • Pro content and streak-freeze on 哲人 are UI-only until v1.1

v0.2 scope (in progress — admin portal + content catalog)

• Next.js admin portal (apps/admin/) for the team to author content
• Supabase Postgres becomes the source of truth for modules → chapters → cards and pathways
• Pathway metadata: difficulty, estimated_days, prerequisite_slugs, subject_tags
• Multilingual content (zh-TW required, en optional) via translation tables
• RLS roles: anon (mobile read), reviewer (translations), editor (CRUD), admin (+ user mgmt)
• Local / staging / production environments, branch-based deploys (staging → preview, main → prod)
• Manual language selection in mobile Users tab
• No content packs yet — new content is online-only; official-v1.json retained as offline fallback

Full plan: IMPLEMENTATION_PLAN.md.

Deferred (v1.1+)

• Mobile auth/sync (per-user progress across devices), RevenueCat, push notifications, PostHog, Sentry, UGC, multimedia cards, content packs, realtime content updates