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I have an iOS prototype written entirely in SwiftUI that’s almost ready for prime time, but a few pain-points are holding it back from the App Store. Right now I’m seeing: i made it in openai-codex- i need someone look at the prototype i made, make sure no bugs, all smooth, works well and launch it in the app store - i also need the code from them and access in order to maintain it myself - make sure its all working well efficiently and clean. Launch in app store. then give me code and all for it to maintain myself. Also want someone who can do it in one chunk and happy pay the one off. not paying hourly or extras. • Crashes in several flows • Performance lags on older devices • UI/UX problems that make some screens feel rough Your mission is to hunt those issues down, smooth every interaction, and walk the build all the way through App Store review. Scope of work • Debug and eliminate all runtime crashes • Profile and optimise code so animations and network calls stay fluid on iPhone 8 and up • Refine layouts, spacing, and gestures so the interface feels native and consistent with Apple HIG • Prepare the final release package—App Store screenshots, metadata, provisioning, TestFlight build, and successful submission Acceptance criteria 1. Crash-free build after a full QA pass 2. Average frame rate ≥60 fps on target devices running iOS 17 3. No layout breaks or clipping in portrait or landscape 4. App approved by Apple and live in the store You’ll receive the existing Xcode project, access to the current TestFlight build, and a short list of known edge-cases. Let’s get this polished, performant and published.
Project ID: 40701060
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158 freelancers are bidding on average £196 GBP for this job

Hello, I am Dr. Rajesh Rolen, PhD in Computer Science & Engineering, with experience of over 20+ years in App Development, iOS Development, Mobile App Development, iPad, iPhone, Xcode, Objective C As a preferred freelancer in the top 1%, I have done 400+ projects here on freelancer.com, I have 4.9 ratings out of 5 on average, which showcases my quality of work and timely delivery. Key Highlights: - Free Hosting Support on the Cloud or any desired platform. - Free 3 months of post-delivery support to ensure that our client doesn’t face any challenges after the launch of the project. - Free Dedicated tester on projects to ensure quality delivery, so clients don’t need to act as a tester. - 10+ Years experience UI/UX team to ensure intuitive UI. Portfolio: https://www.freelancer.com/u/Microlent Please open the chat and send me a message, so we can have a more detailed discussion about the project to give you the project timeline and cost. Thank you for considering my services. I look forward to engaging in a productive conversation and understanding how I can be of assistance in bringing your project to life. Regards Rajesh Rolen
£135 GBP in 10 days
9.4
9.4

Hi, Polishing and publishing an iOS app prototype requires careful attention to runtime stability and performance, especially on older devices like the iPhone 8. The main engineering challenge here is eliminating crashes while optimizing UI responsiveness and ensuring compliance with Apple’s Human Interface Guidelines. I usually structure debugging by first analyzing crash reports and profiling performance bottlenecks under real device conditions. I approach UI refinement by systematically validating layout constraints and gesture responsiveness across orientations. The final submission involves preparing a fully compliant build package, including metadata and provisioning, and navigating the App Store review process to ensure a smooth launch. I recommend separating the crash fixes from UI polish to maintain clear progress tracking and testing coverage. This approach reduces risk and improves stability. Thanks, Hercules
£250 GBP in 7 days
6.9
6.9

Hi there, I can take your existing SwiftUI/Xcode prototype, audit the codebase, fix runtime crashes, improve performance on iPhone 8 and newer, and refine UI/UX so the app feels smooth and native. I’ll run a full QA pass across the key flows, test portrait/landscape layouts, optimize animations and network operations, prepare the release build, TestFlight, App Store screenshots/metadata, provisioning, and handle the submission process through launch. I’ll work on a fixed one-time project basis, not hourly, and at handover you’ll receive the complete source code, Xcode project, required assets/configuration, and access/credentials needed to maintain the app yourself. Can you share the Xcode project and current TestFlight build so I can review the existing prototype and confirm the fixed scope? Kindly send me a message to discuss more or directly award me. Thank you!
£125 GBP in 5 days
7.1
7.1

Hi there, Seeing your app crash and lag right before launch is frustrating, and it can make you feel like you’re stuck at the finish line. But don't worry, with my expertise in SwiftUI and iOS development, I’ll ensure your app is crash-free, performs smoothly even on older devices, and meets the Apple HIG standards. This means a slick, user-friendly experience that gets your app live in the App Store quickly. Here are my questions: Could you specify which flows are currently crashing most often? Also, are there any specific screens where the UI/UX issues are most prevalent? Drop me a message so we can get started right away!
£150 GBP in 5 days
6.0
6.0

Several flows are crashing, older-device performance is lagging, and that combination usually means the prototype needs a proper cleanup before submission rather than a quick patch. I’d approach this by first isolating crash points, profiling the heaviest views/network calls, and then tightening the SwiftUI screens so the app feels consistent and stable on real devices. I’ve worked on cleanup phases where an app was mostly built already but not yet safe to launch, which is a very different job from building features from scratch. The important part here is not only fixing visible bugs, but making sure the handoff is clean so you receive the Xcode codebase, app access, and a version you can actually maintain yourself after approval. A small but important part is avoiding review delays from Apple, so I can also handle the release prep and submission flow with you. - Does the current prototype already have backend/API connections fully in place, or are any crashes tied to unfinished endpoints? - Do you already have App Store screenshots/description draft, or should I prepare those from the app? - Is the Apple Developer account ready for provisioning and submission?
£235 GBP in 7 days
6.2
6.2

Hello, I hope this message finds you well. I have carefully reviewed your project description regarding the iOS prototype in SwiftUI that requires polishing and publishing to the App Store. I understand the critical pain-points you are facing, such as crashes, performance issues on older devices, and UI/UX challenges. My approach will involve thorough debugging to eliminate all runtime crashes, optimizing the code for smooth performance on a range of devices, and refining the UI/UX to align with Apple's Human Interface Guidelines. I will ensure a seamless submission process to the App Store, including all necessary assets and metadata. With a strong background in iOS development and a proven track record of delivering high-quality apps, I am confident in my ability to address your project requirements effectively. You can view examples of my previous work in my portfolio: ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐ Before proceeding, could you please clarify your top priority among the listed acceptance criteria? I am eager to discuss further details and finalize the scope to ensure a successful outcome for your project. Best regards, Muhammad Anas Khan
£80 GBP in 4 days
5.8
5.8

Hi, The iOS prototype’s transition from rough edges to a polished, launch-ready app requires careful attention to runtime stability and performance on legacy devices like the iPhone 8. The main technical risk is ensuring consistent frame rates and crash-free operation across all critical user flows under iOS 17. While my background is primarily in backend and AI system architecture, I have led projects involving complex automation pipelines and performance-sensitive production systems where reliability and smooth user experience were paramount. I typically design systems by isolating core components to validate stability and performance independently before integration, which helps identify and fix bottlenecks early. For this app, separating crash diagnostics, UI responsiveness, and network call profiling will be essential. What will determine reliability here is rigorous profiling and testing on target devices combined with a thorough QA pass to meet Apple’s approval criteria. I can start by reviewing the crash logs and profiling data to outline a targeted remediation plan and validate performance improvements. Thanks, Clifton
£135 GBP in 7 days
5.6
5.6

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
£135 GBP in 7 days
5.8
5.8

Hi, I can take your SwiftUI prototype from Codex to a clean, launch-ready iOS app. I’ll review the entire Xcode project, identify and fix crashes, improve performance, clean up the UI/UX, and test the complete app thoroughly on different iPhone devices. I’ll also handle the TestFlight build, App Store configuration, screenshots, metadata, signing, and submission, including addressing any review issues that arise. Most importantly, I’ll provide you with the complete Xcode source code and required access/setup details so you can independently maintain and update the app after launch. Ready to review the prototype and start immediately.
£135 GBP in 7 days
5.5
5.5

Hi, I can take your existing SwiftUI/OpenAI Codex prototype and turn it into a stable, polished, App Store-ready application as a single fixed-price engagement. With 15 years of software development experience, I’m comfortable taking over an existing codebase, understanding the current architecture, fixing issues, and making it production-ready rather than simply patching individual bugs. I’ll handle: • Full codebase and architecture review • Crash and runtime issue fixing • End-to-end QA and edge-case testing • Performance optimisation, including older iPhones • SwiftUI UI/UX, layout, spacing and gesture improvements • Portrait/landscape compatibility • Network/API and error-state optimisation • Code cleanup and maintainability improvements • TestFlight and final App Store build preparation • Screenshots, metadata and App Store submission I’ll also provide the complete source code and required project/configuration details at handover, so you can independently maintain and extend the app. I understand you want this completed as **one project without hourly billing or unexpected extras**. My focus will be getting the existing prototype properly tested, cleaned up, polished and submitted for release. Share the Xcode project and current TestFlight build, and I can review the existing state and take it through to the final release.
£500 GBP in 30 days
5.8
5.8

Hi, I see a clear path to resolving the issues with your iOS prototype. I can address the crashes, optimize for older devices, and enhance the UI/UX for a smoother experience. I estimate a timeline of around 30 days for the final preparations and submission. To better scope this, could you specify the most critical flows where you're seeing crashes and any particular devices you're focusing on for performance optimization? Also, do you have existing assets for the App Store submission, such as screenshots and metadata, or will those need to be created from scratch? I’ll dive into debugging and optimizing the app thoroughly, ensuring that it meets Apple's guidelines and delivers a polished user experience. The tentative price for this project is $3000, subject to final confirmation based on the scope discussed. Happy to discuss the current setup and take it from there. Best regards, Mohammad
£3,000 GBP in 30 days
5.4
5.4

Hello There! I’m Md Toriqul Islam, and I’m excited to partner with you. I have rich experience in Swift, SwiftUI, iOS development, Xcode, debugging, performance optimization, and App Store deployment. I understand you need your OpenAI Codex-built SwiftUI prototype thoroughly reviewed, with crashes fixed, older-device performance improved, UI/UX refined, and the complete app prepared for App Store launch. I can perform full QA, optimize network calls and animations, prepare TestFlight/release assets, handle submission, and provide the complete maintainable source code and project access after handover. I am skilled in Swift, SwiftUI, Xcode, iOS, TestFlight, App Store Connect, Git, and performance profiling. I have some questions: 1. Can you provide the Xcode project and TestFlight access? 2. What iOS 17 devices have you tested so far? 3. Is your Apple Developer account ready for submission? I’m ready to start immediately. Best regards, Md Toriqul Islam
£80 GBP in 3 days
5.4
5.4

Hi there, I can take your SwiftUI prototype from its current Codex-generated state through a clean, stable App Store release in one fixed-price delivery. I’ll first audit the Xcode project and TestFlight build, reproduce the reported crashes, trace the root causes, and clean up any fragile or duplicated code. I’ll then profile performance on iPhone 8 and newer, optimise rendering, animations and network calls, and refine spacing, layouts, gestures and navigation to feel consistent with Apple’s HIG. I’ll test portrait/landscape flows and known edge cases, prepare the release configuration, App Store screenshots and metadata, create the TestFlight build, and handle the submission process through review. Before handover, I’ll provide the complete source code and required project/configuration files so you can maintain and update the app yourself. I understand you want one upfront fixed price with no hourly billing or surprise extras. Looking forward to working with you. Thanks
£180 GBP in 3 days
5.1
5.1

hi, i have reviewed the details of your project. i can take your existing swiftui prototype, fix the crashes, improve performance on iphone 8 and newer, and clean up the ui and interactions so everything feels smooth and native. i will first review the code and test all main flows, then fix the issues, optimise slow areas, complete a full qa pass, prepare the testflight and app store materials, and handle the submission. i have solid experience working with similar ios projects and can complete this as a fixed one off project without hourly charges. i will also provide the complete source code and required access so you can maintain the app yourself. can we schedule a quick meeting to discuss the project in detail. it will help me understand your needs better and give you a clear plan with timeline and budget. i will also share my portfolio during the chat. mughiraa
£135 GBP in 7 days
5.1
5.1

Hello, "SwiftUI Crash Fix + App Store Release" - you need the Codex-built prototype cleaned, tested and ready for launch. I would audit the existing SwiftUI code first, then fix crashes, improve performance on older iPhones, refine UI issues and run full release QA. I can handle Xcode, TestFlight, provisioning, screenshots, metadata and App Store submission, while delivering the complete source code for your future maintenance. Can you provide the existing Xcode project and TestFlight build so I can assess the current issues? Looking forward to working with you. Artur Gizycki
£550 GBP in 12 days
4.7
4.7

As an experienced and passionate full-stack developer, I have mastered the art of turning ideas into powerful digital products, including mobile app development for both Android and iOS platforms. I am proficient in SwiftUI, the exact language your prototype was built, and I understand the nuances and intricacies of fine-tuning an app to ensure it meets the stringent requirements of the App Store. In line with your project requirements, my approach is to thoroughly debug and optimize your code to eradicate any runtime crashes while improving performance on older devices. Equally important, I will refine your app’s UI/UX to ensure a native feel consistent with Apple HIG. In addition, my experience in publishing apps on various online platforms will guarantee a smooth submission process for you. Working with me means you gain access to an 8+ year experienced professional who has successfully delivered over 200 projects. One key aspect that sets me apart from other freelancers is my 98% on-budget delivery record and long-term support after project handover. I aim to build not just a successful product but a lasting partnership with satisfied clients. Your satisfaction and business growth are my top priorities thus with me, you can rest assured that this prototype will be scrubbed clean, perform optimally, and receive approval from Apple store on time. So let's join hands and release YOUR app as a top-performing reality!
£150 GBP in 7 days
4.8
4.8

Hello, I appreciate the opportunity to assist with your iOS prototype. It sounds like you have a solid foundation, and I understand the importance of addressing the crashes and performance issues to ensure a smooth user experience before the App Store launch. I have extensive experience in iOS development, particularly with SwiftUI, and have successfully optimized applications to enhance performance and reliability. My expertise includes debugging, profiling, and adhering to Apple’s Human Interface Guidelines, which directly aligns with your project requirements. To tackle your project, I would take the following steps: - Perform a thorough debug session to identify and resolve all runtime crashes. - Utilize profiling tools to optimize performance, ensuring fluid animations and network calls on older devices. - Refine UI elements for consistency and a native feel, focusing on layouts and gestures. - Prepare the final release package, including App Store assets and submission protocols. I am eager to help polish your app, ensuring it meets all acceptance criteria and is ready for a successful App Store launch. I am available to start immediately and would love to discuss any further details at your convenience. Thank you for considering my proposal!
£135 GBP in 7 days
4.8
4.8

I understand you need to polish your SwiftUI prototype for App Store launch, similar to how I recently streamlined a client's SwiftUI app, reducing crash rates by 90% and improving performance on older devices by optimizing image loading and network requests. My approach will involve a thorough code audit, leveraging Xcode's Instruments suite for profiling memory leaks, CPU usage, and rendering performance. I'll systematically identify and resolve crash causes, focusing on data management and concurrency issues. For performance, I'll implement lazy loading where appropriate, optimize SwiftUI view updates, and profile network calls for efficiency. UI/UX refinements will be addressed through iterative testing and adjustments to layout, spacing, and animation timings, ensuring a consistent and polished user experience across target devices. To ensure we're perfectly aligned, could you elaborate on the specific flows experiencing crashes? Also, are there any particular older devices you're prioritizing for performance testing? I'm confident I can deliver a robust, App Store-ready application and would welcome a brief chat to discuss your project in more detail.
£226 GBP in 21 days
4.2
4.2

I’m an experienced frontend developer, and I can help polish and prepare your SwiftUI app for App Store release. I’ll do: - Fix crashes and edge-case issues. - Optimize performance for older iPhones. - Refine UI/UX, gestures, spacing Q: Do you already have the crash logs and known issues documented? I can review the Xcode project and get started right away. Regards
£90 GBP in 8 days
4.2
4.2

Hi, I can review your SwiftUI prototype end to end, clean up the Codex-generated implementation, eliminate crashes, improve performance, polish the UI/UX, and manage the release through TestFlight and App Store submission. My work will include: - Full Swift code and architecture review - Crash-log analysis and runtime debugging - Instruments profiling for memory, CPU, rendering, and network calls - Swift concurrency and state-management corrections - Native SwiftUI layout, animation, gesture, and accessibility improvements - Portrait, landscape, Dynamic Type, and multiple-screen-size testing - XCTest/XCUITest automation and regression checks - Screenshots, metadata, signing, provisioning, privacy declarations, and submission - Complete source code, Git history, documentation, and administrator access under your accounts One requirement needs adjustment: iPhone 8 cannot run iOS 17. I can test it on its supported iOS version and use newer devices for iOS 17 validation. Apple makes the final approval decision, but I can resolve implementation-related review feedback and resubmit. Three technical questions: 1. Which screens or actions currently cause crashes? 2. Does the app use a backend, authentication, subscriptions, or external APIs? 3. Is your Apple Developer account already active and fully configured? Best regards, Houssame
£135 GBP in 7 days
4.4
4.4

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