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I will build mobile app development app developer flutter react native ai app creation
katrin
About this gig
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Need a mobile app that works smoothly, looks right and is built to grow with your business?
I build custom mobile apps for startups, businesses and entrepreneurs using Flutter, React Native, Android and iOS. Whether you're starting with an MVP, converting a Figma design into an app or improving an existing product, I handle the development from start to launch.
What I can build:
Flutter & React Native apps
Native Android & iOS apps
Custom UI/UX from Figma
Firebase, Supabase & API integrations
AI features and OpenAI API integration
Web based admin panels
App Store & Google Play deployment
Performance fixes and app improvements
I focus on clean code, responsive interfaces, secure integrations and an app that is practical to maintain after launch.
You will get clear communication throughout the project, plus up to 2 months of post launch app support at no extra cost.
Have an idea, design or existing app you want to improve? Send me the details and let's discuss what needs to be built.
Get to know katrin
katrin
Digital business support, CRM and Automation Expert
- FromGermany
- Member sinceMay 2026
- Avg. response time1 hour
Languages
Spanish, English, French
Hello, I'm Katrin, a full-stack developer with years of experience in custom website and mobile app automation. I specialize in creating visually appealing, fast, and user-friendly solutions tailored to your needs. Let's collaborate to bring your digital project to life and exceed your expectations!
FAQ
Can you build my app from an idea, even if I only have a rough concept?
Yes, you can send me whatever you have, an idea, feature list, sketches or Figma screens. I’ll help define what needs to be built, what can wait for a later version and what information is needed before development starts.
Can you work on an existing app that has bugs or performance problems?
Sure, I can review an existing Flutter, React Native, Android or iOS app, identify the issues and work on the specific areas causing crashes, slow screens, broken features or inconsistent behavior.
Can you connect my app to Firebase, Supabase, APIs or AI services?
Of course, I can handle the backend connections and integrations your app needs, including authentication, databases, APIs, Firebase, Supabase and OpenAI based features. I’ll also make sure the app handles loading, errors and failed requests properly.
