ClassiMarket is a production-ready, full-stack classified buy & sell marketplace — Android & iOS mobile app built with Flutter, a Next.js web platform with REST API, a fully-featured admin panel, and a shared type layer that keeps everything in sync out of the box.

Live Demo & Download

Admin Panel: classimarket.devsnack.dev/admin
Demo APK (Android): Download APK

Demo Credentials

The demo environment is reset periodically. Use the credentials below to log in.

Admin: admin@classimarket.com / Admin123!
Seller: seller@classimarket.com / Seller123!
Buyer: buyer@classimarket.com / Buyer123!

What’s Included

Flutter App — Native Android & iOS app (Dart / Flutter 3.x)
Next.js Web App — Public marketplace, seller dashboard, 50+ REST API endpoints
Admin Panel — Full management interface built into the Next.js app
Shared Type Layer — Single source-of-truth API contract keeping web and mobile perfectly in sync
Full Documentation — Setup guide, quick-start guide, and inline code comments

✨ Key Features

Marketplace & Listings

Infinite scroll listing feed with pull-to-refresh
Multi-level category hierarchy with per-category custom fields (text, number, select, boolean, date)
Full-text search with filters: price range, condition, category, location, sort order
Price types: Fixed, Negotiable, Free, Contact for Price
Item condition tracking: New, Like New, Good, Fair, For Parts
Featured / promoted listing slots
Nearby listings map powered by Google Maps
Up to 10 images per listing with automatic compression
Listing view counter, share button, and report listing
Listing lifecycle: Pending → Active → Sold / Expired / Rejected

User Authentication

Email & password registration with email verification
Google Sign-In and Sign in with Apple (iOS)
Password reset via email
JWT authentication for the Flutter app, NextAuth sessions for the web
Role-based access: User, Seller, Admin
Edit profile: name, avatar, bio, phone, location
Public seller profile page with ratings

Real-Time Chat

Real-time messaging powered by Socket.io
Conversation list with last-message preview and unread badge
Image sharing and price offer messages in chat
Read receipts and user blocking
Push notification on every new message

Subscriptions & Monetization

Tiered subscription plans (Free / Basic / Premium / Enterprise)
Per-plan listing quota and featured listing allowance
One-time featured listing boost purchase
Stripe and PayPal payment integrations
Google AdMob banner and interstitial ads (free-plan users only)

Notifications

Firebase Cloud Messaging (FCM) push notifications
In-app notification center with mark-all-read and swipe-to-delete
Transactional emails: welcome, email verification, password reset, listing approval / rejection
Admin broadcast push to all users or targeted segments

⭐ Reviews & Bookmarks

1–5 star seller ratings with optional written reviews
Average rating displayed on seller profile
Save and manage bookmarked listings with infinite scroll

️ Admin Panel

Dashboard with key marketplace metrics
User management: search, view, ban / unban, change roles
Listing approval workflow with rejection reason
Category and custom field management (no code required)
Subscription plan configuration
Report moderation queue
Payment and transaction history
Broadcast push notifications
CMS: Terms, Privacy, About, Blog articles
Platform settings key-value store

Web Platform (Next.js)

SEO-optimized listing pages with server-side rendering (SSR)
OpenGraph meta tags for social sharing
Auto-generated sitemap.xml and robots.txt
Category pages with static generation (SSG)
Seller public profile pages
Light and dark mode support
Fully responsive design

⚙️ Tech Stack

Flutter 3.x — Riverpod state management, GoRouter navigation, Dio HTTP client
Next.js 14 (App Router) — TypeScript, Tailwind CSS, shadcn/ui
PostgreSQL + Prisma ORM — type-safe database access
Socket.io — real-time bidirectional messaging
Firebase Admin SDK — push notification delivery
AWS S3 / Cloudflare R2 — image storage with Sharp compression
Stripe + PayPal — subscription and one-time payments
Google Maps — nearby listings and geolocation
Google AdMob — in-app advertising
Nodemailer — transactional email (SMTP)

⚠️ Important — Third-Party Services Notice

Please read before purchasing. This item integrates with third-party services that are not included in the purchase price and may incur additional costs based on usage. Buyers are solely responsible for creating their own accounts, obtaining API keys, and complying with each provider’s terms of service and pricing.

AWS S3 / Cloudflare R2 — object storage for listing images (usage-based pricing)
Google Maps Platform — maps, geocoding, and “nearby” features (requires a billing account; free tier then usage-based)
Stripe — subscription and one-time payments (per-transaction fees)
PayPal — alternative payment processor (per-transaction fees)
Firebase (FCM + Auth) — push notifications and Google Sign-In (free tier; paid beyond quota)
Google AdMob — optional in-app ads (revenue-share with Google)
SMTP email provider — transactional email delivery (varies by provider)

The demo environment uses test/sandbox keys for preview only. To run the item in production you must register with each provider above and supply your own API credentials.

Deployment Ready

Includes a Dockerfile and railway.toml for one-click deployment to Railway. Also compatible with Vercel (web), Render, Fly.io, or any VPS with Nginx.

Documentation

Every purchase includes two offline HTML documentation files:

Quick Start Guide — 15-step guide to go from zero to running in under 30 minutes
Full Documentation — environment variables, third-party services setup, deployment, customization, and more

Easy to Customize

Change brand color in one file — all screens adapt automatically (Material 3)
App icon: replace one PNG, run one command
Custom fields per category: configure from the admin panel, no code needed
Subscription plans: fully configurable from the admin panel
All strings, colors, and fonts centralized for easy rebranding

Support

We provide dedicated item support for all buyers.

Email: devsnack26@gmail.com
WhatsApp: +855 967 413 911
Response within 1–2 business days (Monday–Friday)

If you enjoy the item, please leave a 5-star rating — it means a lot and helps other buyers find it. Thank you! ⭐

Changelog

v1.0.0 — 2025: Initial release — full feature set including Flutter app, Next.js web, admin panel, real-time chat, subscriptions, FCM push, Google Maps, AdMob, Stripe, and PayPal.

ClassiMarket | Classified Marketplace Flutter App and Next.js Admin Panel