Coduo — The Gamified Coding Education Engine

Flutter · Firebase · Full-Stack Coding Education · Version 1.0

This item uses artificial intelligence. Coduo includes three optional AI-powered features — an AI code reviewer, an in-lesson AI tutor (“Ask Cody”), and AI error explanation — powered by third-party AI providers Groq, Google Gemini, and OpenAI. You supply your own API key(s) for these providers; none are bundled with this item. AI features fall back to rule-based feedback automatically if no AI provider keys are configured, and the app works normally either way.

A complete, production-ready coding education platform: mobile app, web admin panel, editor role, AI code review, gamification engine, and Firebase backend, all in one package.

iOS and Android · Flutter Web Admin · Firebase Backend · Stripe and Paystack
AI Code Review · Judge0 Code Execution · Leagues and Gamification · 11 UI Languages

Try the Live Demo and Read the Documentation

Explore the admin panel, download the mobile app, and read the full setup and admin guides — no sign-up required.

• Open the Admin Panel (Live Demo)
• Read the Full Documentation

Get the mobile app demo:

Or, if you prefer a direct download: Download the APK Demo

Demo Credentials

Or create a new account directly in the app.

AI Functionality Disclosure

Coduo includes three AI-powered features. All are optional, require your own API keys, and can be individually enabled or disabled from the admin panel at any time.

These features are powered by Groq (primary), Google Gemini (fallback), and OpenAI (fallback), called server-side via Firebase Cloud Functions. You supply your own API keys for these providers; no AI provider keys are bundled with this item. Any code or text a learner submits for review is transmitted to the selected provider’s API for processing, subject to that provider’s own data handling and privacy terms. AI features fall back to rule-based feedback automatically if no AI provider keys are configured.

What Makes Coduo Different

Coduo is not just another LMS template. It is a complete, production-ready coding education engine, with a built-in gamification layer, real code execution, AI-powered review, and everything a learner needs to build a daily coding habit and reach job readiness.

• Real Code Execution — Learners write and run actual code in Python, JavaScript, Java, C++, SQL, Go, and more via the Judge0 engine. Every exercise is validated against real test cases.
• AI-Powered Learning — Integrated Groq, Gemini, and OpenAI support for AI code review, an in-lesson AI tutor called Cody, and one-tap error explanations in plain English.
• Full Gamification Engine — A layered engagement system: streaks, hearts, XP, leagues (Bronze to Diamond), 40+ achievements, gems, cosmetics, leaderboards, and weekly resets, all working together to keep learners coming back daily.
• Social Learning — Follow system, coding clubs, 4-tab leaderboards with animated podiums, public profiles, and portfolio generation create a thriving community around your platform.
• Complete Admin Control — A full Flutter Web admin panel with a separate Editor role for content creators. Manage tracks, lessons, challenges, users, payments, and every gamification parameter without touching code.
• Production-Ready — Offline mode, dark and light themes, RTL layout, 11 UI languages, spaced repetition, adaptive onboarding, interview prep, and a job readiness score. Built to ship, not to demo.

Mobile App Features

Everything learners need to go from complete beginner to job-ready developer, delivered in a daily habit-building format on iOS and Android.

Learning and Curriculum Features

A structured curriculum engine that takes learners from zero to job-ready with 4 exercise types, real code execution, and AI-powered feedback at every step.

• Structured Learning Tracks — Tiered curriculum from Beginner through Intermediate to ML Fundamentals and Advanced AI. Each track contains modules and each module contains ordered lessons.
• 4 Exercise Types — Concept cards, free-form coding exercises with test case validation, fill-in-the-blank code completion, and multiple choice questions keep each lesson varied and engaging.
• Real Code Execution via Judge0 — Supports Python, JavaScript, TypeScript, Java, C++, C, SQL, Go, Rust, Ruby, Swift, Kotlin, and PHP. Code runs in a sandboxed environment with per-exercise test cases.
• AI Code Reviewer — One-tap structured feedback powered by Groq, Gemini, or OpenAI. Provides line-by-line comments, correctness rating, and improvement suggestions.
• AI Tutor (Ask Cody) — Conversational AI tutor available inside every lesson. Cody has full lesson context awareness and can answer questions, explain concepts, and guide debugging.
• AI Error Explanation — One tap turns any runtime or compile error into a plain-English explanation. Beginners no longer get stuck on cryptic error messages.
• Skill Assessment Onboarding — Adaptive quiz on first launch places each new learner at the right level automatically so no one repeats what they already know.
• Daily Coding Challenges — One new challenge every day with a countdown timer and a 7-day history tracker. Admins schedule challenges weeks in advance from a calendar view.
• Spaced Repetition and Offline Mode — Flashcard-style concept review queue using spaced repetition. Lessons and preferences are cached locally via Hive for full offline reading with background sync.
• Interview Prep and Job Readiness — Curated interview question sets by topic and difficulty. A composite Job Readiness Score tracks each learner’s progress toward being hire-ready.

Gamification Engine

A fully configurable gamification engine built specifically for coding education. Every lever, including XP, hearts, leagues, streaks, and gems, is tunable from the admin panel without touching code.

• Streak System — Daily streak tracking with fire animation and milestone celebrations. Streak Freeze tokens protect streaks on missed days. Streak repair within a configurable window.
• Hearts and XP — 5 hearts per session are deducted on wrong answers. XP is awarded for every lesson, exercise, challenge, and daily challenge completed. Full levelling system.
• League System — Bronze, Silver, Gold, and Diamond weekly leagues with promotions and demotions every Sunday. Weekly XP resets keep competition fresh and accessible.
• 40+ Achievements and Badges — Achievements across 7 categories with animated unlock celebrations. Badges display on public profiles and contribute to the Job Readiness Score.
• Gems and Cosmetics — Virtual gem currency earned through activity. Spend in the Gem Shop on streak freezes, hint reveals, avatar frames, and profile themes. All gem prices are configurable.
• Leaderboards and Social — 4-tab leaderboard: Weekly, All Time, League, and Following. Animated gold, silver, and bronze podium for top 3. Follow system, coding clubs, and public profile pages.

Admin Panel Features

A full Flutter Web dashboard that gives you complete control over every part of your platform. No developer needed to manage content, users, payments, or gamification settings.

Admin Panel — Full Feature Breakdown

• Content Management — Create and publish learning tracks, modules, and lessons from a visual tree editor. Attach concept cards, coding exercises, fill-in-the-blank tasks, and MCQs to any lesson. Set XP rewards, difficulty ratings, and prerequisite locks per module.
• Challenge Library — Build a library of standalone coding challenges. Each challenge supports multiple test cases, language selection, time limits, and difficulty tagging. Schedule them as daily challenges from a built-in calendar view.
• User Management — Search and filter the full user list by name, email, subscription tier, or join date. View each user’s profile, XP total, streak, league rank, and subscription status. Manually grant or revoke premium access and assign editor roles.
• Payment and Revenue Dashboard — View all transactions across Stripe, Paystack, and bank transfer in a unified dashboard. Filter by gateway, date range, or status. Revenue charts show daily, weekly, and monthly breakdowns at a glance.
• Subscription Plan Manager — Create and edit subscription tiers with custom names, pricing, billing cycles, and feature access. Toggle each plan on or off without deleting it. Set which tracks and features are gated behind each tier without touching code.
• Gamification Controls — Configure XP values per lesson and exercise type, hearts per session, streak freeze cost, gem earn rates, league promotion thresholds, and weekly XP reset timing. Add, edit, or disable any of the 40+ achievements without a code change.
• Gem Shop Editor — Manage all purchasable items in the in-app gem shop. Set gem prices for streak freezes, hint reveals, heart refills, avatar frames, and profile cosmetics.
• Push Notification Scheduler — Compose and schedule push notifications from the admin panel. Target all users, premium subscribers, or specific league tiers. Built-in templates for daily reminders, streak risk alerts, new content, and achievement celebrations.
• AI and Code Execution Settings — Enter and manage API keys for Groq, Gemini, OpenAI, and Judge0 from a secure settings panel. Toggle individual AI features on or off. Switch between RapidAPI-hosted and self-hosted Judge0 without changing a single line of code.
• Platform and AdMob Settings — Configure payment gateway toggles, AdMob ad unit IDs, maintenance mode, onboarding flow visibility, and interview prep availability. All settings take effect in real time without requiring an app update.

Editor Role

Invite content creators, instructors, and subject matter experts to build out your curriculum without giving them access to user data, payments, or platform settings.

Editor Role — Full Feature Breakdown

• Track and Module Builder — Create new learning tracks and organise them into modules with a drag-and-drop order editor. Set track titles, descriptions, skill level tags, language focus, and thumbnail images.
• Lesson Editor — A full rich-text lesson editor with support for code blocks, inline formatting, images, and PDF attachments. Each lesson can contain an ordered mix of concept cards, coding exercises, fill-in-the-blank tasks, and MCQs.
• Coding Exercise Builder — Write the problem statement, starter code, solution code, and up to 10 test cases per exercise. Select which programming languages are allowed and set a per-exercise time limit for execution.
• Challenge Builder — Build standalone coding challenges separate from the lesson curriculum. Define difficulty, expected time, and XP reward. Challenges can be published to the general library or scheduled as a daily challenge on a specific date.
• Daily Challenge Scheduler — A calendar view lets editors plan and assign daily challenges weeks in advance. Each calendar slot shows the challenge scheduled, its difficulty, and its XP value. Editors can swap, reschedule, or clear any date.
• XP and Hint Configuration — Set XP rewards individually for each lesson, exercise, and challenge. Write up to 3 progressive hints per exercise, each with its own gem cost. Hints are revealed one at a time so learners decide how much help they need.

Payment Gateways

Three payment methods to serve learners globally. Enable any combination from the admin panel without touching code.

Technical Stack

Coduo is built on modern, scalable technologies that ensure performance, maintainability, and long-term reliability in production.

Requirements

The following tools, accounts, and services are required to build and deploy Coduo successfully.

Third-Party Service Cost Disclaimer

Please read before purchasing. Coduo integrates with the following third-party services: Firebase, Stripe, Paystack, AdMob, Judge0, Groq, Gemini, OpenAI, Apple, and Google Play. Every one of these is an independent platform with its own separate pricing and billing terms. None of their costs are included in the price of this item. You are responsible for any usage costs incurred from these services.

You are responsible for reviewing each provider’s current pricing page and managing your own accounts and billing with them before deploying to production.

Licensing and Monetization

The Regular License covers the core app features for personal or single-client use, where the end product is free to the end user. To earn revenue from users through Stripe, Paystack, AdMob, or AI features, you will need to purchase the Extended License. Please select the correct license before purchase.

All buyers receive the full source code, including the Firebase Cloud Functions. What differs between licenses is permitted use, not file access: monetizing the end product (charging users, running ads, or offering paid AI features) requires an Extended License, in line with standard Envato licensing terms. Using monetization features under a Regular License is a violation of the license agreement regardless of whether the relevant files are present in your download.

Before You Buy

Documentation: Full setup, deployment, and admin panel documentation is available at https://coduo.greentrek.net/. Please read it thoroughly before installing or contacting support.

Bug Reports and Support: Coduo is developed and maintained by an independent developer. If you encounter a bug or need assistance, please reach out through the contact details provided in the documentation. Confirmed bugs are addressed in the next scheduled release.

Freelance and Customization: Need a custom feature or a branded version of Coduo for a specific market or use case? Freelance development and customization services are available. Contact details are included in the documentation.

API Keys and Accounts: Stripe, Paystack, AdMob, Firebase, Judge0, Groq, Gemini, OpenAI, and Apple Developer accounts are required separately. Coduo provides the integration; you supply your own API keys. Step-by-step instructions for every service are in the documentation.

Ready to Launch Your Coding Education Platform?

Coduo ships a learner app, web admin panel, editor role, AI code review, real code execution, full gamification engine, and Firebase backend, production-ready and documented to the last detail.

• Open the Admin Panel (Live Demo)
• Read the Full Documentation

Or, if you prefer a direct download: Download the APK Demo

Changelog

Version 1.0 — 01 September 2026

• Initial release