Learnmate AI | Flutter AI Language Learning Tutor App with Voice Call RevenueCat Paywall

Learnmate AI is a modern mobile platform built for interactive, conversational language study. Utilizing fast LLM inference alongside intelligent conversational fallbacks, the app empowers users to practice spoken dialogue, engage in simulated voice calls, master regional accents, and retain essential vocabulary through structured repetition tools.

Developed with Clean Architecture and Riverpod State Management, Learnmate AI comes pre-integrated with RevenueCat In-App Subscriptions (Weekly, Monthly, Yearly), enabling publishers to deploy a fully monetized Free vs. Pro tier business immediately.

⚠️ Important Note on Third-Party API Services & Costs:
This product integrates external APIs from Groq and OpenAI for LLM inference, as well as RevenueCat for managing purchase receipts. Buyers must register their own developer accounts with these service providers. Using these external third-party services is subject to their individual pricing models and will generate ongoing operational API costs based on your active user volume and token usage.

Key Features & Functionality

• Dual Intelligence Engine: High-performance chat responses leveraging Llama 3 via Groq with an automated GPT-4o-mini fallback layer.
• Interactive Voice Calling: Real-time spoken dialogue practice with native speaker personas via integrated Text-to-Speech (TTS).
• Localized Speaker Personas: Targeted cultural and regional dialogue practice for Spanish, French, German, Japanese, Italian, Mandarin, Korean, and English.
• RevenueCat Paywall Ready: Pre-built subscription UI with flexible Weekly, Monthly, and Annual payment setups.
• Smart Vocabulary Vault: Daily curated terms, audio playback, custom study decks, and spaced repetition tracking.
• Instant Translation & Grammar Notes: Tap-to-translate functionality with immediate grammar and syntax breakdowns.
• Dark Glassmorphism Interface: High-retention UI crafted for clarity, smooth navigation, and immersion.

Monetization & In-App Subscriptions (RevenueCat Pre-Integrated)

Deploy a recurring subscription revenue model instantly. Learnmate AI includes a built-in paywall gating system:

Supported Languages & Dialect Personas

• Spanish: Castilian, Mexican & Andalusian
• French: Parisian, Bordeaux Sommelier & Riviera
• German: Standard Hochdeutsch & Bavarian
• Japanese: Tokyo Standard & Kyoto Tea House
• Italian: Roman Chef & Milan Fashion Stylist
• Mandarin: Standard Putonghua & Shanghai
• Korean: Seoul K-Pop & Busan Barista
• English: British RP & American Accent

Technical Specifications & Stack

• Flutter Framework (v3.29+): Single unified codebase for iOS & Android.
• Architecture: Riverpod state management adhering to MVVM design principles.
• Configuration Management: Secure externalized .env file setup for API keys and service endpoints.
• Local Storage: Fast local caching powered by Hive and SharedPreferences for offline speed.
• Speech Synthesis: Native multi-language Text-to-Speech (TTS) integration.