About the Client
An award-winning Google Cloud Partner with over 900 employees, the client delivers cutting-edge cloud infrastructure and digital services. One of their offerings—a motor service booking app for brand customers—faced growing performance challenges as its user base expanded across varying devices and network conditions.
Business Impact
Nimap significantly improved the app’s performance and user experience through a deep technical overhaul:
- App size reduced by 55%, improving storage efficiency
- Download times accelerated by 65%, especially in low-bandwidth areas
- Crash rate decreased by 80%, enhancing reliability across Android devices
- User satisfaction increased, reflected in better Play Store ratings and lower uninstall rates
The Challenge
“Our app was bloated, slow, and prone to crashing on older devices. We needed expert intervention to make it leaner, faster, and more stable—without compromising features.” — Product Manager, Client Organization
Key technical hurdles included:
- Excessive app size (75MB) from unused assets and oversized images
- Slow download times, especially in rural or low-bandwidth areas
- High crash rates (~3.5%), primarily from memory leaks and compatibility issues
Device compatibility problems on older Android versions
Our Approach
Nimap performed a full-stack performance audit of the Android app, from asset optimization and crash diagnostics to download efficiency and memory management. We applied best practices in native Android development with modern tools for diagnostics, rendering, and packaging.
Why Android Native + .NET?
- Android Native provided low-level control over image handling, asset management, and crash resolution
- .NET backend integration ensured data consistency and fast performance
- Tools like Crashlytics, ProGuard, and Glide enabled granular control over optimization and stability
Key Initiatives
- App Size Optimization
- Removed redundant layouts, unused drawables, and duplicate classes using Android Studio Lint and APK Analyzer
- Converted PNGs/JPEGs to WebP, reducing size without visual compromise
- Implemented ProGuard/R8 to shrink unused code and libraries
- Faster Downloads
- Adopted Android App Bundles for device-specific APK delivery
- Introduced lazy loading for non-critical assets to reduce initial install payload
- Crash Monitoring & Resolution
- Integrated Firebase Crashlytics for real-time diagnostics
- Used Glide for optimized image loading with memory caching
- Resolved OutOfMemory and NullPointerException issues affecting legacy devices
The Solution
The Nimap team engineered a leaner, high-performance Android app built with:
- Optimized resource architecture to reduce app weight
- Device-targeted APKs for faster, smarter installs
- Real-time crash reporting and memory handling with Crashlytics and Glide
- Future-ready code structure, maintaining compatibility across Android versions
Features Delivered
- Lightweight APK (33.75 MB from 75 MB)
- Lazy-loaded assets for post-install performance
- Real-time crash reporting with root cause analytics
- Glide-based image rendering with caching
- Compatibility improvements for older Android devices
- Code obfuscation and shrinking via ProGuard/R8
The Results
| Metric | Before | After | Improvement |
| App Size | 75 MB | 33.75 MB | 55% reduction |
| Average Download Time | ~28 seconds | ~10 seconds | 65% faster |
| System Stability | OS-specific issues affecting reliability | Platform-wide consistency across Linux & Windows | Increased Operational Reliability |
| Crash Rate | ~3.5% | < 0.7% | 80% reduction |
| User Ratings (Play Store) | 3.5 | 4.0 | +0.5 rating points |
| App Uninstall Rate (30 days) | 17% | 9% | 47% decrease |
Client Testimonial
“Nimap didn’t just fix our app—they reimagined it. From faster installs to a smoother UX across devices, the impact was immediate. Their Android and backend team worked seamlessly to deliver performance at scale.” — Head of Mobile Development, Client Organization
Conclusion
Nimap’s Android and .NET optimization strategy delivered a lightweight, crash-free, and high-performance mobile experience. Through precise engineering, real-time diagnostics, and modern tools like Crashlytics, Android App Bundle, and Glide, we helped this global cloud tech leader regain user trust and operational efficiency.
