Android & iOS App Development

I am ready to turn a well-defined concept into a polished mobile product and need a developer who can build and release fully-featured apps for both Android and iOS. The design direction is set: a classic, professional look—clean lines, restrained color palette, intuitive navigation, and typography that feels timeless rather than trendy. You may work natively (Swift/SwiftUI for iOS, Kotlin for Android) or use a cross-platform tool such as Flutter or React Native if it achieves the same refined finish and smooth performance.

I will provide wireframes, brand assets, and a functional spec once we have an NDA in place. From there I’m expecting:

• Production-ready source code for each platform
• UI that precisely follows the classic style guide
• Test builds delivered through TestFlight and internal Android tracks
• Guidance through App Store and Google Play submission, including compliance screenshots and metadata

Please share a portfolio link showing at least one live app with a comparable professional aesthetic, your preferred tech stack, and an estimated timeline for a first test build.