Language Learning

Education · React + Node (Express) · 19 @molecule/* packages

Duolingo-like language learning app with lessons, exercises, streaks, and XP — with built-in Stripe-backed subscription tiers

What is inside

activities — id, actorId, action, resourceType, resourceId, metadata, createdAt
activity_seen_status — userId, lastSeenActivityId, updatedAt
course_enrollments — id, course_id, user_id, current_unit, current_lesson, enrolled_at
devices — id, createdAt, updatedAt, userId, name, pushPlatform, pushSubscription, hasPushSubscription
exercise_results — id, exercise_id, user_id, answer, is_correct, xp_earned, time_taken_ms, completed_at
exercises — id, lesson_id, type, prompt, choices, correct_answer, explanation, xp_value, …
follows — id, followerId, targetType, targetId, createdAt, updatedAt
language_courses — id, language_name, language_code, flag, level, unit_count, lesson_count, description, …
lessons — id, unit_id, course_id, title, duration_min, lessons_remaining, progress_percent, level, …
notifications — id, user_id, type, title, body, href, unread, created_at
units — id, course_id, position, title, description, created_at
user_profiles — user_id, total_xp, lessons_completed, current_streak, longest_streak, daily_goal_xp, last_activity, target_languages, …
vocabulary_items — id, user_id, word, pronunciation, translation, example, language_code, mastery, …

free / pro / team — gated by: maxCourses, maxExercises, maxLeaderboard, maxLessons, maxProgress, advancedFeatures, canExport, retentionDays

The @molecule/* packages are Apache-2.0. The app you build from this template is yours to export and self-host. Licensing