LinguaAI — Speak Any Language with AI

LinguaAI is a complete, production-ready AI language learning app built with Flutter. It combines the power of OpenAI GPT-4o and Google Gemini to deliver an immersive, personalized learning experience across 20 languages. Whether you’re building a language learning startup or adding AI-powered education to your portfolio, LinguaAI gives you everything you need — ready to customize, rebrand, and publish. Download Demo APK Key Features AI-Powered Learning AI Conversation — 5 modes: Free Chat, Scenario, Guided Lesson, Role Play, Correction Mode (powered by OpenAI GPT-4o) AI Vocabulary Cards — Generate flashcards with pronunciation, examples, and cultural notes (powered by Google Gemini) AI Grammar Lessons — Auto-generated lessons with concept explanation, examples, and interactive practice AI Stories — Generate reading stories by theme and level with tappable word translation and comprehension quizzes Daily Challenge — Word of the day, phrase of the day, and mini quiz Smart Learning System SM-2 Spaced Repetition — Scientifically-proven algorithm for optimal vocabulary retention CEFR Level Assessment — A1 to C2 level placement with personalized content Learning Path — Visual node-based curriculum with completion tracking Pronunciation Guide — IPA phonemes with audio playback TTS & STT — Text-to-speech and speech-to-text for all 20 languages 20 Target Learning Languages Spanish · French · Japanese · Chinese · German · Korean · Italian · Portuguese · Arabic (RTL) · Hindi · Russian · Dutch · Turkish · Swedish · Polish · Greek · Vietnamese · Thai · Indonesian · Ukrainian Note: These are the languages learners can study. The app interface itself is in English. Gamification 30 Levels with XP progression 25 Badges — unlockable achievements Streak System — daily practice tracking with fire emoji Hearts System — limited attempts that refresh daily XP Chart — weekly progress visualization Celebration Animations — confetti overlay on achievements Full Monetization RevenueCat — 3 subscription tiers (Monthly $4.99, Yearly $29.99, Lifetime $49.99) Google AdMob — Banner ads on main tabs + interstitial ads after sessions Premium Gate — Ads hidden for premium users Free Tier Limits — Configurable via Firebase Remote Config (no rebuild needed) Authentication Email/Password registration and login Google Sign-In (Android & iOS) Apple Sign-In (iOS only) Forgot password with email reset User-friendly error messages User Experience Onboarding Flow — 4-slide intro, native language picker, target language selection, CEFR assessment Dark Mode — Warm dark theme (not cold black) RTL Support — Full Arabic right-to-left layout Custom Transitions — Fade, slide-up, and scale animations Offline SRS — Review vocabulary without internet Push Notifications — FCM + local streak reminders ️ Tech Stack Framework Flutter (Android + iOS) State Management Riverpod 2.x Navigation GoRouter Backend Firebase (Auth, Firestore, Remote Config, FCM) AI OpenAI GPT-4o + Google Gemini 2.5 Models Freezed + json_serializable Monetization RevenueCat + Google AdMob Font Nunito (Google Fonts) What You Get Full Flutter source code (Android + iOS) 15+ screens, 15+ providers, 15+ Freezed models 81 unit tests Comprehensive HTML documentation (offline) Quick start guide with step-by-step setup Firestore security rules template 6 months of support Quick Setup Create Firebase project, add google-services.json and GoogleService-Info.plist Enable Authentication (Email, Google, Apple) Add OpenAI and Gemini API keys to Firebase Remote Config Run flutter pub get and flutter run Detailed setup instructions included in the documentation. Requirements Flutter SDK 3.29.2+ (Dart SDK 3.7.2+) Firebase account (free tier works for development) OpenAI API key (pay-as-you-go, ~$0.10-0.50/user/month) Google Gemini API key (free tier available) RevenueCat account (free for <$2.5k/month revenue) AdMob account (optional) Screenshots Browse the item preview gallery above for full-resolution screenshots covering: onboarding flow, AI conversation (5 modes), vocabulary SRS, AI grammar lessons, AI stories with tappable translations, daily challenge, learning path, paywall, profile, and dark mode. Documentation Comprehensive offline HTML documentation is included with the source download. Open Documentation/index.html in any browser for the full guide, or QuickStart/quick-start.html for a 15-minute step-by-step setup.  

(Only For Premium Category Products !)

1. All digital products are the most recent version, with no possibility of free updates. After payment, you can request an update to the most recent version for 5 days if a new version is released. We free support within 5 days.

2. If a license is required (Excludes WHMCS license , we provide only method not license), please contact us via email or ticket for assistance with activation. Our license is only valid for activation and does not include support.

3. We provide Mobile, PHP script installation services for $19.90 / ₹1700. Please create a backup after installation as we do not support re-installation. For mobile app source code, we do not offer installation services.

4. If you have any questions, please contact us by email [email protected] or create a ticket on this page

5. Please note that any digital products presented on the website do not contain malicious code, viruses or advertising. You will receive the original files from the developers. We do not sell any products that have been downloaded from other websites.

6. The response time can last up to 6 hours.

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Benefits of our Membership Plans

• Instant access to all plugins and all themes including all future releases
• Unlimited domain usage
• Regular Updates as of when available. Usually, updates are released daily.
• Before purchasing, please read the Terms and Conditions & Refund Policy.
• If you have any questions, please first read the FAQs.
• If you haven’t found the answer to your question, please contact us, and we will respond ASAP.
• Please note that any digital products on the website do not contain malicious code, viruses, or advertising. We buy the original files from the developers. We do not sell any products downloaded from other sites.
• Buy or download for FREE by subscribing to our VIP Membership Plan. Join the club of more than 1100+ happy members. This is the same theme as sold by the developer.

Updates:

• We offer frequent updates for one year from the date of purchase. After this period, you have to purchase the item again to receive further updates, we also offer lifetime updates as a second option.
• We regularly update products as soon as we are notified about an update, we go and download it from the author and update it on our site, but In case the current version of the product is not the latest, You can request an update for the product by contact form.
• We send regular emails advising when products have been updated so please be sure to provide an active email address when you sign up.

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• Our support team is available 24/7, if you have any questions or need help in installing or configuring digital products purchased on the website, please don’t hesitate to contact form.
• Please note that we are not developers of the provided products, so our technical support capabilities are limited. We do not change product functionality and do not fix developer bugs.

For more information please read FAQs & About Us.

(Only For WHMCS Category Products !)

• We Only provide WHMCS Module, how you can  nulled any module step only !
• Instant access to all plugins and all themes 
• Unlimited domain usage
• Regular Updates as of when available. Usually, updates are released daily.
• Before purchasing, please read the Terms and Conditions & Refund Policy.
• If you have any questions, please first read the FAQs.
• If you haven’t found the answer to your question, please contact us, and we will respond ASAP.
• Please note that any digital products on the website do not contain malicious code, viruses, or advertising. We buy the original files from the developers. We do not sell any products downloaded from other sites.