Professional mobile app maintenance & engineering
Senior engineering for critical startups. We stabilize production apps, modernize legacy SDKs, and fix technical debt with surgical precision.
App Maintenance Engagement Models
Structured mobile support designed for clarity, zero-downtime SDK migrations, and production stability.
App Health Audit
- Deep-dive code & infra review
- Crash log & performance analysis
- Full store compliance check
Stability as a Service
- Proactive priority bug fixes
- OS & Third-party SDK updates
- Firebase & Cloud infrastructure upkeep
- Continuous release support
Rescue & Modernization
- Legacy application revival
- Major stack & framework migrations
- Deep architectural refactoring
- Zero-downtime technical overhauls
Enterprise-Grade Mobile App Support
Professional React Native and Flutter support for production apps. We specialize in SDK upgrades, technical debt rescue, and performance stabilization.
Modernizing Old Code
We upgrade outdated SDKs and fix broken dependencies so your app stays stable. No downtime, no breaking changes — just a clean, modern codebase that's easy to work with.
- Upgrading iOS & Android SDKs
- Fixing broken React Native & Flutter plugins
- Resolving performance bottlenecks
- Safe rollbacks if things don't go as planned
- Zero-downtime deployments
Switching Frameworks
Moving from Native to Flutter? Or React Native to Swift? We handle the heavy lifting while keeping every feature perfectly intact. Same app, better foundation.
- Native to Cross-Platform migrations
- Framework-to-framework porting
- Performance-first architecture
- Ensuring feature parity
- Full QA across all devices
How We Work
A proven process designed for zero-downtime stability and long-term maintainability.
We check the code
First, we look under the hood. We'll audit your codebase and crash logs to find exactly where the issues are hiding and give you a straight-up roadmap with no fluff.
We map the mess
We identify every single dependency and outdated plugin. By the end, we'll know exactly which versions are causing trouble and how to fix them without breaking anything else.
The Gameplan
We create a step-by-step migration plan. You'll see exactly what we're changing and why before we touch a single line of your production code.
Real Work
Our engineers get to work, implementing fixes bit by bit. You'll get daily updates and can check our progress on a staging environment anytime.
Testing & Launch
We test everything on real devices to catch even the smallest bugs. Then we'll help you ship the update and stick around to make sure it stays stable.
Full-Stack Mobile Engineering Expertise
Production-grade technologies for stabilization, iOS/Android SDK migrations, and scalable backend infrastructure.
Mobile
iOS (Swift)
Android (Kotlin)
React Native
Flutter
Backend
Node.js
Python
Go
Rust
Java
Express
Database
PostgreSQL
Supabase
Firebase
Redis
DevOps
Docker
GitHub
AWS
React Native to Flutter Migration
Case Study: How we rescued a failing React Native app through a performance-first Flutter migration and dependency modernization.
The Challenge
- React Native 0.61 with 200+ outdated dependencies
- Frequent crashes affecting 15% of users
- Unable to ship new features for 8 months
- App Store rejection due to deprecated APIs
The Results
- Migrated to Flutter 3.x in 8 weeks
- Crash rate reduced to 0.3%
- 40% performance improvement
- Zero downtime during migration
"They saved our business. What seemed impossible became a smooth, well-executed migration."
— Engineering Lead, Series B SaaS Platform
Schedule a Mobile App Audit
Ready to stabilize your production environment? Schedule a technical consultation with our senior mobile engineers to resolve crashes and modernize your stack.
Meet the Team
Elangovan
Solutions Architect
Balaji
Head of Engineering
Krisna
Software Engineer
Need to talk now?
contact@getappfix.com