I need a seasoned mobile developer to build a straightforward utility app that will run seamlessly on both iOS and Android. The overall concept is already mapped out; now I’m looking for someone who can turn that concept into a polished, store-ready product. My priorities are a clean, intuitive interface and rock-solid performance on the two platforms. You’ll handle design, coding, basic QA, and packaging for App Store and Google Play submission. I will provide the full feature list, wireframes, and any required API keys as soon as we start. Please share examples of utility apps you’ve shipped to both stores, note your preferred tech stack (whether that’s Swift/Kotlin, React Native, Flutter, or another cross-platform solution), and outline a realistic timeline from kickoff to launch. Source code and build instructions must be delivered at hand-off so I can maintain and update the app after release.