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Fiverr Pro
English
$
USD
I will assess, fix, customize or rebuild your ios, android or web app
Vetted Pro, Mobile, Web, SaaS, AI and Design Development
100+ production apps shipped 5 stars maintained across every single one. That's the standard I've held for 10 years as a developer and Founder of Marrix Power — a Vetted Pro software agency building m...
Vetted by Fiverr Pro
Andrew Maksakov was selected by the Fiverr Pro team for their expertise.
Vetted for
App Design
Mobile App Development
Mobile App Maintenance
Software Development
Website Development
About this Gig
Vetted Pro
Looking for a Vetted Pro agency to assess, fix, customize or rebuild your mobile or web app?
You've found the right partner.
I'm Andrew, Founder of Marrix Power and a Vetted Fiverr Pro. My team has rescued, improved and rebuilt 100+ mobile and web applications for clients worldwide fixing bugs, adding features, improving performance and rebuilding broken codebases.
What we deliver:
- Full app assessment and technical audit
- Bug fixing and performance optimization
- Feature additions and customization
- UI UX improvements and redesign
- Code refactoring and cleanup
- Backend and API fixes and improvements
- App Store and Google Play resubmission
- Full source code handover
Industries: SaaS, e-commerce, fitness, social, booking, fintech, healthcare, education.
The Marrix Power Advantage:
- Agency team, personal oversight from Andrew on every project
- We assess honestly before recommending a solution
- Vetted Pro independently approved by Fiverr for technical excellence
- We work with any existing codebase Flutter, React Native, Swift, Kotlin
- Clean handover with full source code every time
Message us before placing your order.
Platform:
Cross-platforms
App type:
Hybrid
Tools:
Power apps
•
Bubble
•
Flutterflow
•
Expo
•
Android Studio
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Unity
•
Xcode
My Portfolio
Other Mobile App Maintenance Services I Offer
FAQ
Can you work with my existing app code?
Yes. We work with any existing codebase — Flutter, React Native, Swift, Kotlin, React, Node.js. We review your code first, identify issues, and give you an honest assessment before recommending a fix or rebuild.
How do you decide whether to fix or rebuild?
We assess your existing code quality, architecture and technical debt. If fixing is faster and cheaper we fix. If the codebase is too broken we recommend a rebuild. We always give you an honest recommendation, not the most expensive one.
Can you add new features to my existing app?
Yes. Adding features to existing mobile or web apps is one of our most common requests. We review your current architecture first to ensure new features integrate cleanly without breaking existing functionality.
