Rebuild Source for Mobile App

@corpmember29

Hello, LEGACY APP RECOVERY & REBUILD — I HAVE 10+ YEARS OF EXPERIENCE WITH IOS, ANDROID, MOBILE APP REVERSE ENGINEERING, API INTEGRATION AND REBUILDING LEGACY APPLICATIONS. I understand you no longer have the original source code and need the existing app recovered from the signed IPA where practical, or accurately rebuilt based on the IPA, screenshots, video walkthrough and available API documentation. I can first audit the IPA to determine what UI, assets, application structure and logic can realistically be recovered. Where binary recovery is limited, I can recreate the missing functionality while matching the existing screens, navigation, authentication flow, API behaviour and push notification structure. I can deliver: Readable and commented iOS source in Swift/Objective-C Android source in Kotlin/Java, or Flutter/React Native where appropriate Email/password authentication Push notification integration and payload handling Matching UI, navigation and user flows TestFlight and Google Play internal-testing builds Setup/signing/dependency documentation Physical-device testing on both platforms I can start with the IPA assessment and existing materials, then determine the most practical recovery vs. rebuild approach before development. Thanks, Christina

@irsolutions

With over a decade of experience in mobile app development, I understand the importance of rebuilding your source code for the consumer-facing app on both iOS and Android. I have successfully scaled projects for over 1 million users and have expertise in handling high-security systems, making me well-equipped to tackle the challenges of this project. To ensure scalability and security, I will decompile the signed iOS IPA provided and reconstruct the application to maintain its original behavior on both platforms. With my past success in building and scaling apps for large user bases, I am confident in delivering a solution that meets your requirements. I encourage you to reach out to discuss the roadmap further and see how we can work together to restore and enhance your app. Let's schedule a call to dive deeper into the technical details and move this project forward efficiently.

@mikelilei82

Hi there, I can help you recover or rebuild the app with a practical approach. With 12+ years in iOS and Android development and recent Flutter work, I would first inspect the IPA to understand what can realistically be recovered, then use your screenshots, walkthrough, assets, and API notes to recreate the app behavior cleanly where decompilation is limited. For this case, I would likely recommend Flutter unless the IPA reveals a strong reason to stay native. It keeps iOS and Android aligned, reduces duplicate work, and makes future maintenance easier while still supporting secure email/password authentication and platform push notifications properly. I would deliver readable source code, test builds for TestFlight and Google Play internal testing, setup/signing notes, and physical-device verification for auth and push flows. I’m happy to review the current app with you and identify the safest path before implementation.

@C0RETECHIES

Hello, System understanding: You need to recover the source of a live iOS/Android app from the supplied IPA, screenshots and video. Core behavior includes email/password authentication and push notifications that must match the existing timing and payload. The goal is to deliver readable iOS (Swift/Obj-C) and Android (Kotlin/Java) projects (or a Flutter/Kotlin Multiplatform build) that produce TestFlight and Google Play internal-test builds, plus a setup guide and confirmation of working auth and push on a physical device per platform. Technical approach: We will decompile the IPA with Hopper/Ghidra to extract logic and UI flow, then rebuild native modules using Swift and Kotlin, preserving the original API contracts. Networking will be re-implemented with URLSession/OkHttp to mirror auth calls; push handling will use the same APNs/FCM configuration to replicate payload timing. If cross-platform speeds delivery, a Flutter/KMM version will be considered while maintaining pixel-perfect UI from the screenshots. Core modules: 1) Authentication (login, token refresh, secure storage). 2) Push notification handling (registration, token sync, background delivery). 3) UI screen reconstruction (navigation, controls, state). 4) Networking layer (API client, request/response mapping). 5) Build & signing scripts (CI-friendly, TestFlight/Play Internal track). 6) Settings and analytics stubs if needed. Relevant systems: SecureCom (Mobile + Desktop) - E2E encrypted messaging with push notifications and auth; StepOut Live (4-App Ecosystem) - multi-app platform with real-time chat and push; ZappStore - native iOS/Android store app with payment, QR and deployment experience. Implementation strategy: 1) Analyze IPA and document flows; 2) Build a vertical slice of auth + push on iOS/Android; 3) Iteratively recreate each screen using supplied screenshots/video; 4) Wire networking to match existing APIs; 5) Generate build artifacts and setup guide; 6) Validate on one physical device per platform. Questions: 1) Can you share the exact API endpoints and request/response format for authentication and push notifications? 2) Are there any third-party SDKs (analytics, crash reporting, etc.) embedded in the IPA that must be reproduced? 3) What is the target date for delivering a testable internal-test build for QA on each platform? Regards, Rohit

@tangramua

Hello,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in Mobile App Development, iPhone, Objective C, iPad, iOS Development, React Native, Android App Development and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.   Best regards, Sales department Tangram Canada Inc.     

@Hammadhassan21

Howdy, Rebuilding an app from only a signed IPA requires more than simply recreating the screens. The key is first determining what can realistically be recovered from the binary and then rebuilding anything that cannot be recovered while preserving the original behavior as closely as possible. I can reproduce the authentication flow, navigation, screen behavior, and push notification timing and payload structure using the IPA, walkthrough, branding assets, and available API documentation. I’d then validate the rebuilt app on physical iOS and Android devices to ensure reliable behavioral parity. Flutter or React Native can also be considered if they provide the required parity while keeping the rebuilt application easier to maintain. I can show you similar legacy app reconstruction, mobile, authentication, and push notification projects in chat. If you share the IPA and walkthrough, I can first assess the recovery and rebuild path before proposing the implementation plan. Portfolio: https://www.freelancer.com/u/Hammadhassan21 Best regards, Hammad Hassan

@gotucat

Hi, I reviewed the project and understand that you need the existing iOS and Android app rebuilt from the signed IPA, with matching screens, interactions, authentication, and push notifications. I can inspect the available binary, screenshots, walkthrough, branding assets, and API documentation, then recreate the app with Flutter or React Native while preserving platform behavior. The rebuilt Mobile App Development solution will include secure email/password authentication, Server integration, matching push notification timing and payloads, readable source, and TestFlight and Google Play internal testing builds. I’ll keep the implementation clean, well-commented, responsive, and easy to manage, with setup and signing documentation plus physical-device verification on both platforms. Let’s discuss here now.

@rahuliitm69

Hi, I can develop/recreate your existing iOS & Android app from the signed IPA, screenshots, video walkthrough, branding assets, and available API documentation. I have already developed similar mobile platforms and handled legacy app reconstruction, authentication, API integration, push notifications, and production deployments. My development approach: • Analyze the IPA and existing app flows to recover/understand reusable UI and logic where technically possible. • Rebuild missing functionality with clean, maintainable Swift/Kotlin or Flutter/React Native code while maintaining pixel/behavioral parity. • Implement secure email/password authentication and integrate your existing APIs. • Recreate push notification timing, payload structure, and backend triggers. • Test every screen and interaction against the current app on physical iOS and Android devices. • Deliver TestFlight/Google Play internal testing builds plus source code and setup documentation. I’ll also ensure the project is structured for future maintenance and updates rather than simply reproducing the existing binary. Two questions: Do you still have access to the existing backend/API endpoints and authentication environment? Is the IPA from the latest production version currently available on the App Store? I can start with a technical assessment of the IPA and provide a clear reconstruction plan. Thanks Rahul

@ciss26

Hello there, Hope you are doing well I’d be glad to help recover or recreate your existing iOS and Android app while preserving the current user experience and core behavior. Since you have the signed iOS IPA along with screenshots, video walkthroughs, branding assets and API documentation, I’d begin with a technical assessment to determine what can realistically be recovered from the binary and what is better rebuilt cleanly. My Approach IPA assessment – Analyze the available binary, app structure, resources and observable behavior to determine what can be recovered and what cannot. Functional mapping – Document every screen, navigation path, authentication flow, API interaction and notification behavior from the existing app. Rebuild/reimplementation – Where source recovery isn't practical, recreate the application with equivalent UI, workflows and backend integration. Authentication – Implement the existing email/password flow securely. Push notifications – Reproduce the existing notification triggers, payload structure and handling as closely as the available backend/API information allows. Cross-platform validation – Test the rebuilt application against the original behavior on physical iOS and Android devices. Thanks & Regards Dheeraj K.

@rajat07me

Recreating an app from only a signed IPA is really two jobs at once: first figuring out what can realistically be recovered, then rebuilding the missing pieces cleanly so iOS and Android stay in sync. The main risk here is not the UI itself, but hidden behavior around auth, notification payloads, session handling, and edge-case flows that are easy to miss if the rebuild is rushed. I’d start by mapping every screen and interaction from your IPA, screenshots, and walkthrough, then use that as the parity checklist for the rebuild. I’ve worked on recovery-style projects where the original codebase was incomplete or unusable and the real work was matching behavior, not just appearance. For this kind of app, using a shared codebase like Flutter or React Native can often speed delivery while still giving you readable source, store-ready builds, and cleaner long-term maintenance. A small setup guide and physical-device verification can be included as part of handoff. - Do you still have access to the backend endpoints used for login and push triggering, or would any of that need to be rediscovered from app behavior? - Are there any post-login flows, subscriptions, or in-app purchases involved beyond authentication and notifications? - Would you prefer native separate projects, or are you open to Flutter/React Native if it gets you parity faster?

@codefusion53

Hi I can help recover and rebuild this app even without the original source code. I would first inspect the IPA to determine what can realistically be extracted, including UI structure, assets, endpoints, configuration, and application behavior. If full recovery is not practical, I can recreate the app from the IPA, screenshots, walkthrough video, branding, and API documentation, then deliver maintainable source code for both iOS and Android. Flutter or React Native would likely be the most efficient option if both platforms need identical behavior. I can reproduce the email/password authentication flow, integrate push notifications with matching payload handling and timing, test on physical iOS and Android devices, and prepare builds for TestFlight and Google Play internal testing. You will receive clean source code, setup documentation, signing instructions, and backend notification guidance. Best, Justin

@CodeAnchors

Greetings, I understand the urgency and importance of rebuilding your consumer-facing mobile app on iOS and Android due to the unavailability of the original source code. My expertise in Mobile App Development, iOS, Android, and React Native positions me as a suitable candidate for this project. My approach involves a structured requirement confirmation process, controlled planning, clean implementation, thorough testing, and milestone-based transparency to ensure a successful rebuild. With a strong portfolio in Mobile App Development and a focus on reliable execution, I am committed to delivering long-term results for your project. Could you please clarify the primary business goal behind this rebuild to help me tailor the solution to your specific needs? I invite you to open a chat so we can finalize the scope smoothly and efficiently. Best regards, Muhammad Anas Khan

@zainalitariq245

Hello there You need to recover or accurately rebuild an existing iOS and Android app from the available IPA screenshots videos and API documentation. The main risks are limited recoverable logic from the binary and reproducing authentication and push notification behaviour without the original source. I would first inspect the IPA and supplied assets to determine what can realistically be recovered. If full recovery is not practical I will rebuild the app based on the observed flows while matching the existing UI and behaviour closely. Flutter or React Native can be used if it helps maintain parity across both platforms. I will provide readable source code TestFlight and Google Play builds setup documentation and physical device testing for authentication and notifications. Which backend API documentation and push notification payload details are still available from the original system? Portfolio: https://www.freelancer.pk/u/zainalitariq245 Best Regards Zain Ali.

@gtssoftindia

Let's get started right now. Do you have a quick time to discuss in more brief about your project on a call? I assure you that you will get a secure, scalable, and 100% bug-free Android/iOS app where you will get all kinds of features. I am always looking for a long-term relationship, and I could be the one-stop solution in terms of design, development & QA, so you don't have to search for a new employee for every new project. I can spend at least 40 hours/week on your project (the project will be completed on time). I have been in this sector for like 5+ years now and am pretty experienced in creating apps with using the, Swift, React Native, Laravel, PHP, and Node.js. I am equipped to develop apps using these languages in all industries. Well-versed in in-app purchases, Machine learning, AI solutions, Dark Mode, Siri, Memoji, Real-time tracking, Multilinguality, Live Streaming, Photo/Video Editing, Voice Search, Push Notifications, User Authentication, User Profile Creation, Location, Chat, Map/social media/Payment Integration. Apart from that, I possess great familiarity with UI design principles, patterns, and best practices, Android Architecture Patterns (MVP, MVVM, MVI), REST (Retrofit, OkHttp, WebSockets), and Strong knowledge of Android SDK, different versions of Android. I look forward to the great opportunity to work with you. Best Regards

@Eliteinno

✋ Hi, the main risk is assuming the IPA can be turned back into clean source code. In practice, decompilation may recover assets, strings, app structure, and some logic clues, but it usually does not recreate the original project in a maintainable form. I’d treat the IPA as a reference source and rebuild cleanly if recovery quality is poor. I’d first inspect the IPA, screenshots, walkthrough video, and available API documentation to map screens, navigation, authentication, push-notification behavior, and backend dependencies. Then I’d recreate the app in React Native or native Swift/Kotlin, depending on how platform-specific the original behavior is, while matching the existing UX closely. Authentication and push handling would be rebuilt against the current backend, tested on physical devices, and documented for signing, dependencies, and notification triggering. I won’t claim prior legacy-app recovery projects I can’t verify. Do you still control the existing backend and API endpoints used by the live app, or does that server-side functionality also need to be reconstructed?

@invoketech

HELLO, I have worked on similar mobile app reconstruction, legacy app migration and iOS/Android development projects and can share relevant examples. I have carefully reviewed your requirements and can analyze the available IPA, screenshots, video walkthrough and API documentation to determine what can be recovered and what needs to be rebuilt. I have 10+ years of experience in iOS, Android and cross-platform development and can recreate the existing authentication, push notification behavior, UI and user flows with close functional parity. Working Flow: App Analysis → Review the IPA, screens, walkthrough and available backend/API documentation. UI & Flow Reconstruction → Recreate screens, navigation, interactions and existing app behavior. Authentication → Implement the existing email/password authentication flow securely. Push Notifications → Reproduce notification timing, payload handling and backend integration. Build & Testing → Generate iOS/Android builds, test on physical devices and provide source with setup documentation. Thanks, Invoke Tech

@Jennycreation

Hello Sir, I have already worked on similar types of website and software development projects and I am confident that I can successfully handle your project. I am a full-time freelancer with **17+ years of experience** in web development, software development, automation, and API integrations. My expertise includes: * Android app development * ASP.NET C# web and software development * Python automation and web scraping (Amazon, Instagram, Facebook, Google Maps, LinkedIn, Telegram, and other custom scraping solutions) * JavaScript, jQuery, AJAX, Bootstrap, HTML5 * Microsoft SQL Server database development * Payment gateway integration * SMS, Email, Banking, Financial, and Insurance API integration * Custom automation bots and workflow automation software I focus on delivering **high-quality, scalable, and reliable solutions** with clean code and long-term support. Please contact me in private chat so we can discuss your requirements in detail. I can also show you a **demo of similar projects** I have completed. Looking forward to working with you. Thanks & Regards

@cliftonc20

Hi, Rebuilding the source for a mobile app across iOS and Android platforms requires careful attention to cross-platform consistency and native feature access, especially given the mix of Objective C and React Native technologies mentioned. The main technical risk is ensuring smooth interoperability and state synchronization between the native and React Native components without introducing latency or instability. While my core expertise lies in backend AI systems rather than mobile app development, I approach systems by clearly separating concerns such as UI rendering, business logic, and data handling, which is critical for a maintainable mobile rebuild. I typically design modular architectures that allow independent testing and scaling of components, which can also apply to cross-platform mobile apps. What will determine reliability here is a robust integration and testing strategy for platform-specific features and third-party dependencies to avoid regressions and performance bottlenecks. I can help by outlining an architecture review or integration validation plan to ensure the rebuild meets both functional and performance goals. Clifton

@kishanbwts

Recovering app logic directly from an IPA is tricky, but I’ve helped clients rebuild apps by combining partial decompiles with a fresh codebase—this approach keeps the original flow while fixing gaps faster than starting from scratch. With your screenshots, video, and API docs, I can map out each interaction to recreate authentication and push logic precisely. I suggest using React Native if you want faster parity on iOS and Android while keeping the codebase maintainable. Does your push notification service support sending test payloads easily? Also, what backend tech handles authentication now? I’ll deliver clear, clean projects on both platforms (or React Native), ready to test on devices. You’ll get a setup guide and confirmation that sign-in and notifications work end to end. The walkthrough call sounds perfect to clarify specifics upfront. I’m ready to jump in and get your app back in users’ hands quickly.