Offline-First Vocabulary & Etymology Trivia

Master Words Naturally. Challenge the World.

Immerse yourself in rich linguistic roots, Greek & Latin etymology, spaced repetition, and fair global leaderboards. Designed for lifelong learners, students, and word enthusiasts.

Download on Google Play (Free) Get Vocab Trivia Pro

Vocab Trivia (Free)

Includes all 20 Zipf Rarity Packs (~23,000 curated words with Zipf < 4.0, from Uncommon I to Obscure IV), spaced repetition quizzes, daily streaks, 6-second Party Mode, and community leaderboards.

Ad-Supported with Consent Control: Supported by checkpoint interstitial ads via Google AdMob (governed by Google UMP privacy consent, with an offline house Pro upsell fallback) and instant offline progress export to Pro.

Android: com.lunalabs.vocabtrivia Google Play →

Vocab Trivia Pro

Includes all 20 Zipf Rarity Packs (~23,000 curated words with Zipf < 4.0) with uninterrupted study flow (no 10-word ad checkpoints) while directly supporting independent lexicography.

100% Ad-Free & Zero Ad Trackers: One-time A$4.99 purchase with zero third-party ad networks initialized, zero checkpoint interruptions, and instant progress import from the Free edition.

Android: com.lunalabs.vocabtrivia.pro Google Play →

App Architecture & Data Integrity

Both editions of Vocab Trivia are built with an offline-first, privacy-centric philosophy:

🔒 Anonymous Auth

No email or social login required. You are assigned an anonymous cryptographic ID to sync leaderboard scores securely without personal identity collection.

⚡ Offline SQLite

All word packs, definitions, and daily quiz loops operate locally on your device. Internet access is only needed to download new packs or submit scores.

🛡️ Total Data Control

Purge your cloud progress and leaderboard entries at any time directly in the app or via our self-serve data deletion process.

Store Compliance & Legal Disclosures

Luna Labs Pty Ltd (ABN 82 685 697 205) is an Australian studio based in Queensland, committed to complete transparency, full compliance with the Google Play Data Safety policy, and Apple App Store Review Guidelines:

Privacy Policy: Detailed disclosure of data collected, Firebase Authentication UIDs, Cloud Firestore storage categories, local SQLite storage, and data retention policies.
Terms of Use: Clear license agreements, user conduct rules for leaderboard display names, fair play terms, and warranties.
Account & Data Deletion: Dedicated Google Play compliant guide to deleting all cloud accounts, leaderboard records, and local data.

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Direct Support & Developer Inquiries

Have questions about your data, gameplay, or vocabulary content? Contact the development team at games@lunalabs.au.