# App Tech Partner > Independent mobile engineering by Daniel Antunes Rocha in Lisbon. Direct, scoped React Native and Expo help for founders and small teams. The HTML pages contain their substantive text in the initial response. The text file below collects the public business content, including prices, scope, exclusions, career history and contact instructions. It does not contain private planning costs. ## Read first - [Full public content](https://apptechpartner.com/llms-full.txt): Public background, packages, situation pages and founder guides. - [Founder guides](https://apptechpartner.com/guides/): Practical answers for mobile app founders. - [About Daniel](https://apptechpartner.com/about/): Career timeline and independent availability. - [Services data](https://apptechpartner.com/services.json): Structured package prices, scope, timing, deliverables and exclusions. - [Profile data](https://apptechpartner.com/about.json): Structured identity, skills and career milestones. ## Situation pages - [AI-built app](https://apptechpartner.com/ai-built-app/): Whether you are preparing to invite users or already seeing problems in use, I review one priority user journey or technical risk. You get written findings, clear next steps and a 30-minute call. - [Build an app](https://apptechpartner.com/build-mobile-app/): Start with a focused iOS and Android product plan, then develop it in defined, separately quoted stages with direct technical ownership. - [Audit & recovery](https://apptechpartner.com/react-native-app-audit/): A senior technical audit for unstable codebases, blocked releases, repeated regressions or apps that have become difficult to change. - [Push notifications](https://apptechpartner.com/push-notifications/): Find where delivery, permissions, deep links or tracking fail across iOS and Android, then scope the right fix. - [Store launch](https://apptechpartner.com/app-store-launch/): A focused sprint for one agreed build, signing, subscription or review problem, with checks and a repeatable handover. - [Technical partner](https://apptechpartner.com/mobile-technical-partner/): A limited monthly partnership for founders who need steady technical progress, sound decisions and someone accountable for mobile quality. ## Founder questions - [How do I know if my AI-built app is ready for real users?](https://apptechpartner.com/guides/is-my-ai-built-app-ready/): Pick that task and try it in your own installable app build with a fresh account. Record the build, device, actions and result. Check that another account cannot reach the saved data, then repeat the task after a common interruption such as losing the network. If it fails or the access rules have not been checked, keep testing with invited accounts and sample data before opening the app to real users. - [Can I publish an AI-built app on the App Store and Google Play?](https://apptechpartner.com/guides/publish-ai-built-app/): Yes. The Apple and Google Play policies linked below, checked on 4 October 2026, do not state a blanket ban on AI-assisted code. That is our reading of the published rules, not an approval guarantee. Before submitting, make sure you control the source and the developer account for your chosen platform, can install your own build on a real phone, and can show reviewers a working app with accurate listing and privacy details. Features such as subscriptions or AI-generated content add rules of their own. - [A user paid for premium. Why is the app still locked?](https://apptechpartner.com/guides/paid-but-premium-locked/): Start with what you can verify internally: the store transaction, the product, the in-app account, its access permission (often called an entitlement), and the screen or server rule that enforces it. Record the first disagreement. Before requesting a receipt, check whether your own systems already show the purchase or a known delivery failure. Tell the customer what you are investigating and what happens next; do not imply access is restored until you have verified it. - [Why does my AI-built mobile app break again after every fix?](https://apptechpartner.com/guides/ai-built-app-keeps-breaking/): A patch can change shared code, rely on different backend data, or seem correct in a development preview while the installed build still fails. Sometimes nobody reproduced the original fault before editing. Pause new features, choose one failure you can repeat, and record its build, device and account. Find the last version where that action worked. Test a specific hypothesis before changing code, then show that the same check and the nearby journey pass in the relevant build. - [Should I use Expo, React Native, or native development for my app?](https://apptechpartner.com/guides/expo-react-native-or-native/): First check whether an installed app solves a need your mobile website cannot. If it does not, improve the mobile web experience. If it does, start from what you have: Capacitor can package an existing web app, React Native with Expo builds one app for iOS and Android, and Swift with Kotlin suits a product built around platform-specific features. Expo is a framework for React Native, not a separate engine. Replit is where code can be written and hosted, not the framework on the phone. Before committing, build one representative feature in your own app build and test it on an iPhone and an Android phone. ## Contact and policies - [Project enquiry](https://apptechpartner.com/#project-enquiry): Visual form for contacting Daniel. - [AI contact](https://apptechpartner.com/ai-contact/): User-authorized assistant handoff through the API or optional hosted MCP. - [OpenAPI contract](https://apptechpartner.com/openapi.json): Read the public API requirements before an HTTP action. - [Privacy notice and request form](https://apptechpartner.com/privacy/): How enquiry data is used and how to request access, correction or deletion. An assistant must show the person the exact details and obtain explicit approval before calling a write tool. Browsing the site does not authorize or enable a submission.