Extended Selling App is another selling app works like letgo that comes with firebase realtime and powerful features. It is developed in Java (MVVM arch) with Android studio, the admin panel and api is developed with Strapi framework (Koajs and Reactjs).
Features:

Easily integrated with Admin Panel
Easily integrated with Firebase to holds realtime chat feature, favorite and other things
In-app purchasing to sell items quickly feature.
Admob is integrated with Interstitial and Banner
Google, Facebook, Email and Phone Registration
Easily see on your selling, sold, favorite items and reviews,
Smooth review system.
Detailed listing page with gallery and map location feature.
In-app purchases feature with Google Play Billing api.
FCM push notification that adding from Firebase messaging, when favorite your item and send message.

Admin Panel Demo:
https://shielded-harbor-84166.herokuapp.com/admin/
Username : admin
Password : 123456

Images and icons from Flaticon and Pexels

Extended Selling App with Firebase Realtime and Admin Panel - 1

Extended Selling App

Extended Selling App with Firebase Realtime and Admin Panel