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TradeZone Marketplace
Native Android marketplace app with 1.2M users across 3 countries
1.2M
Active users across 3 countries
4.7★
Google Play rating
1.8MB
Final APK size
4 months
Idea to Play Store launch
The Challenge
TradeZone wanted to disrupt local classifieds in South Asia with a native Android app focused on speed, low-data usage, and vernacular language support. The target audience used mid-range Android devices with inconsistent connectivity — so offline-first architecture and sub-2MB APK size were non-negotiable requirements.
The app needed buyer protection, in-app chat, listing boost payments, and dynamic regional pricing — all built and launched within 4 months.
Our Approach
- Built natively in Kotlin + Jetpack Compose for a modern, performant UI on Android 8 through 14
- Implemented offline-first architecture with Room database and WorkManager for background sync
- Optimised APK to 1.8MB using R8 full-mode obfuscation and resource shrinking for low-storage devices
- Built real-time in-app chat using Firebase Realtime Database with read receipts and image sharing
- Integrated Razorpay for in-app payments with UPI, cards, and EMI — handling listing boost purchases
- Submitted to Google Play with full content rating, data safety form, and staged rollout to 3 regions
“Building for mid-range Android at scale is harder than it looks. MindGrid Labs nailed the offline experience and the app feels faster than apps from companies ten times our size.”
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