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I need a mobile developer to bring my existing app up to the latest platform version and smooth out any issues the update introduces. This first step is strictly a maintenance pass—no payment is attached to it. Once the upgrade is stable, I will open a paid phase to add new AI-driven matching features. Please show me tidigare arbete—examples of past mobile projects where you performed successful version migrations or similar fixes. Initial deliverables • Rebuild the app on the newest SDK or framework version with zero build errors. • Resolve any crashes, broken functionality, or noticeable slow-downs created by the upgrade. • Supply a concise change log summarising what you adjusted and why. If you’re comfortable starting with this unpaid phase and would like to be first in line for the upcoming paid AI work, let’s talk.
Project ID: 40389618
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120 freelancers are bidding on average $128 USD for this job

As the founder and leader of CnELIndia, a leading web and app development enterprise, I have witnessed first-hand the rapid evolution of mobile platforms and the challenges that developers face in ensuring smooth version migrations. This extensive 18-year industry experience sets me apart as your ideal candidate for this project. Our plethora of skills span across PHP, WordPress, WooCommerce, data scraping - but our top-notch skills lie in Android and iPhone app development. AI-nurtured personalized matchmaking is one of our core competencies. I'm well-prepared to not only fix any errors or crashes that may arise during your app's upgrade process but also to reimagine your app with AI-driven matching features after this unpaid phase. Choosing CnELIndia for this project means the guarantee of meticulousness, reliability, and steadfast adherence to deadlines. Let us kickstart this upgrade journey together, unlocking more potential for your mobile application while targeting perfect technical harmony between your app and the newest developmental advancements. Together we can positively transform your app into an everlasting success story.
$140 USD in 7 days
9.0
9.0

Hello We are Ominfowave Software Services Pvt. Ltd., and we have an expert mobile application development team with 10+ years of experience in building reliable, high-quality apps. ? Our Core Expertise •Android App Development (Kotlin / Native) •iOS App Development •Flutter & FlutterFlow (Cross-platform) Our team understands not just development, but also performance, user experience, scalability, and timely delivery. ? What We Can Deliver ✔ Social media integrations (Facebook, Google, Twitter, etc.) ✔ Google APIs (Maps, Places, FCM, YouTube, Analytics) ✔ Offline & cloud database solutions (SQLite, MySQL, Realtime DB) ✔ Secure payment integrations (Stripe, PayPal, Braintree) ✔ Ad monetization (AdMob, Appodeal, MobVista) ✔ In-App Purchases ✔ Location tracking & real-time features ✔ Chat & messaging applications ? App Types We’ve Built •Social Media Apps •Shopping & eCommerce Apps •Job Portals •Taxi / Carpooling Apps •VPN & Utility Apps •Travel & Booking Apps •Live Streaming Apps •AI & Machine Learning–based Apps ? Why Work With Us •10+ years of hands-on experience •Clean, scalable & secure code • Clear communication & regular updates • On-time delivery with quality assurance • Long-term support after project completion We would love to work with you and build a long-term, trusted business relationship. Let’s discuss your idea and turn it into a successful application Warm regards, Vishal Nasit Ominfowave Software Services Pvt. Ltd.
$225 USD in 10 days
8.5
8.5

I have extensive experience in mobile app development, including successful version migrations and fixes. I am confident in my ability to bring your existing app up to the latest platform version, resolving any issues that may arise. Rest assured, I will deliver the initial requirements of rebuilding the app on the newest SDK, fixing any crashes or broken functionality, and providing a detailed change log. If I understand correctly, once this phase is complete, we can move on to the paid phase for adding new AI-driven features. I am eager to start this project and assure you that I will work within your budget and timeline. Let's discuss the details further. Please go through my profile its 15 years old see the work I did over the years. No Win No Fee means that your satisfaction is my utmost priority. Lets discuss the job details. Moreover, I am willing to start the job and perform tasks without even being hired; it is just to show my commitment to this project. Looking forward to hear from you.
$123 USD in 6 days
8.7
8.7

Hi, To bring your app up to the latest platform version, I'll ensure a smooth upgrade and fix any issues that arise. This will include: - Rebuilding the app on the newest SDK or framework version. - Resolving any crashes or broken functionality. - Providing a concise change log summarizing adjustments. I'll follow a structured approach to identify and fix issues efficiently. Ready to start once you provide access to the existing app and any relevant details. Thanks!
$100 USD in 1 day
8.2
8.2

Greetings, You need a mobile developer to upgrade your existing app to the latest SDK version and fix any issues introduced during the migration. I will build this with: SDK/framework upgrade, crash and bug fixing, performance stabilization, and a clean build with no errors Using Android/iOS native tools (Kotlin/Swift or current framework), this will be a stable, fully updated app with restored functionality and improved reliability after migration. I’ve handled similar version upgrades and maintenance fixes before. Let’s discuss.
$140 USD in 7 days
7.8
7.8

Hi. As an Android and iOS Expert, I can upgrade your project. I am very familiar with Android Studio, Xcode and Laravel. I have mobile and backend skills with 8+ years. I wish to work for you. Thanks for attention.
$50 USD in 1 day
7.3
7.3

Hello There!!! ★★★★ (Mobile App Upgrade & Maintenance for Latest Platform Version) ★★★★ I understand that you need a mobile developer to update your app to the latest platform version, fix any issues that arise from the upgrade, and provide a concise changelog. ⚜ Rebuild the app on the newest SDK or framework ⚜ Resolve crashes or slowdowns post-upgrade ⚜ Test and fix broken functionality ⚜ Supply a change log of adjustments ⚜ Prepare for the upcoming AI-driven features I’ve successfully handled similar version upgrades and maintenance tasks for multiple mobile apps, ensuring smooth transitions to the latest platforms without compromising performance. My approach is simple: I’ll start by rebuilding your app on the latest SDK, test for any issues, and resolve them to ensure a stable update. Once this is complete, I’m happy to move on to the paid phase for AI features. Let’s get started! Warm Regards, Farhin B.
$110 USD in 10 days
6.7
6.7

Hello, I can help upgrade your current mobile app to the latest platform version and make sure everything runs smoothly again. I’ve handled similar migrations before on both iOS and Android, along with fixing backend issues in Laravel and PHP. I’m comfortable starting with this unpaid maintenance phase, and I’d be glad to share earlier work where I completed version upgrades and stability fixes once we connect. Thanks, Teo
$200 USD in 2 days
6.5
6.5

Drawing from over 12 years of experience in mobile app development and system optimization, I am equipped to handle your project with utmost professionalism and efficiency. I am well-versed in the tools and tech stack your project demands, countering potential build errors, crashes, broken functions, or slow-down issues that inevitably arise from version migration. In the past, I've successfully delivered similar projects with precision and earned satisfied clients. Apart from being proficient in Android and Laravel, my repertoire extends to PHP and React Native-two necessary skills for executing this project flawlessly. Your app will be rebuilt utilizing the latest SDK or framework version with zero build errors. I'll also provide a change log summarizing all adjustments made and the reasons behind them. It's paramount for me to ensure that the app remains stable despite the upgrade before proceeding to any paid phases. Additionally, my availability stems not only from my own expertise but also from my tight-knit team of professionals who expertize in UI/UX design, graphics and 3D/CAD modeling. This allows me to tackle a wider spectrum of requests while guaranteeing quality results within your stipulated timeframe. Can't wait to start improving your app for better functionality!
$50 USD in 5 days
7.0
7.0

If you need someone to breathe new life into your mobile app by upgrading it to the latest platform, I'm your guy. My name is Vimal Kumar, a seasoned Full Stack Developer with over a decade in the industry. I've successfully completed 100+ projects, many of which included version migration tasks similar to this one. So, yes, I can absolutely handle transforming your app to the newest framework while ensuring zero build errors. My expertise covers a range of specialized areas from Android and Mobile App Development to AI-powered solutions – a skillset uniquely qualified for your upcoming paid phase involving AI driven matching features. Clients have consistently praised my fast delivery times, clear communication, and consistent ability to maintain flawless functionality post-update. By choosing me for this "unpaid phase" today, you're effectively putting yourself in line for top-notch work in the subsequent paid phase because I aim to establish long-term relationships with my clients. With this project and others I undertake, my primary goal is always helping businesses grow, scale, and succeed through modern digital strategies and technologies. Your vision together with my execution power could be a force to be reckoned with. Let's make it happen!
$200 USD in 7 days
6.3
6.3

At Toriqul Global Solutions, we transform ideas into high-performing digital products. We are a professional web development agency led by Engineer Md. Toriqul Islam brings over a decade of expertise in designing and developing websites, applications, and custom digital solutions. What We Deliver: ✔ Stunning modern websites ✔ Powerful custom web applications ✔ Mobile apps for Android & iOS ✔ E-commerce platforms ✔ Business automation systems ✔ SEO-friendly and fast-loading websites Our Tech Stack: React, Node.js, Laravel, PHP, WordPress, Python, .NET, MySQL, MongoDB, React Native, Bootstrap, JavaScript, and more. Why Clients Trust Us: • Business-focused solutions • Clean UI/UX design • Secure & scalable systems • Reliable deadlines • Transparent communication • Excellent after-sales support We don’t just build websites, we build results. Let’s create something amazing together. Best Regards, Toriqul Global Solutions
$95 USD in 3 days
6.1
6.1

Hello, I understand the need to first stabilize your app on the latest SDK before moving into new feature development. I can handle version upgrades and debugging, but I should be upfront—I don’t take on unpaid phases. That said, I can offer a low-cost initial audit + upgrade phase where I: ✔ Update the app to the latest SDK/framework (Android/iOS/React Native/Flutter) ✔ Fix build errors, crashes, and performance issues ✔ Ensure smooth functionality across devices ✔ Provide a clear changelog of fixes and improvements I’ve worked on similar upgrade/migration tasks where outdated dependencies and breaking changes caused instability, and I focus on resolving them cleanly without introducing regressions. If you're open to a paid initial phase, I’d be happy to start immediately and continue with the AI feature phase afterward. Let’s discuss your current stack and issues. Best regards, ALOP
$30 USD in 1 day
6.4
6.4

Hi, I came across your project "Unpaid for Version Upgrade" and I'm confident I can help you with it. About Me: I'm a agency owner with over 8+ years of experience in PHP, Mobile App Development, Laravel, Android, App Development, iPhone, Mobile Development. , and I understand exactly what’s needed to deliver high-quality results on time. Why Choose Me? - ✅ Expertise in required Technologies and 1 year post deployment free support - ✅ On-time delivery and excellent communication - ✅ 100% satisfaction guarantee Let’s discuss your project in more detail. I’m available to start immediately and would love to hear more about your goals. Looking forward to working with you! Best regards, Deepak
$130 USD in 7 days
5.8
5.8

Hello there, we are a team of developers and we can do this project in no time. Thanks Ashish Kumar.
$140 USD in 7 days
5.7
5.7

⭐⭐⭐⭐⭐ ✅Hi there, hope you are doing well! I have completed several mobile app version upgrades recently where I rebuilt apps on new SDK versions, resolving build errors and ensuring smooth performance effortlessly. Based on my experience, the most important part is thorough testing to catch and fix all upgrade-induced issues before delivery. Approach: ⭕ I will rebuild your app on the latest SDK/framework to ensure zero build errors. ⭕ I will systematically test and fix crashes, broken features, or slowdowns caused by the upgrade. ⭕ I will provide a clear, concise change log summarizing all technical adjustments. ⭕ I will communicate regularly and promptly during this unpaid maintenance phase to align on progress. ❓ Could you share which platform version and SDK your current app is on? ❓ Are you targeting both iOS and Android for the upgrade? ❓ Do you have any automated tests and access to current source code? I am confident I can deliver a stable upgrade for your app as your first choice for the upcoming AI feature development phase. Looking forward to hearing from you soon. Best regards, Nam
$200 USD in 3 days
5.4
5.4

Good Day! I’ve reviewed your requirement, and the key here isn’t just execution, it’s getting the structure and flow right so it actually works the way you expect. That’s exactly where I can help. You need a mobile developer to upgrade your existing app to the latest SDK or framework version, fix any build errors or crashes introduced during migration, and provide a clear change log while keeping the app stable for future AI feature expansion. I have handled similar version migrations and maintenance updates where I ensured zero build failures, restored broken dependencies, and improved performance after upgrades, and I can share relevant past work in chat. Let's discuss the project further in chat or let's have a quick call!
$90 USD in 4 days
5.1
5.1

Hello, I came across your project Unpaid for Version Upgrade and I am very interested in working with you. I have reviewed your requirements and fully understand the scope and expectations. I specialize in PHP, Mobile App Development, iPhone, Android, Software Testing, Laravel, Mobile Development, App Development, AI Development and have successfully delivered similar projects before. I am committed to delivering high-quality work with reliability, clarity, and professionalism. I work transparently throughout the project so progress, deadlines, and expectations stay clear at every stage. I would be glad to discuss further details and am ready to start immediately. Looking forward to hearing from you. Regards, Anum
$140 USD in 3 days
5.3
5.3

Hello, I am Vishal Maharaj, a seasoned professional with 20 years of experience in PHP, Software Testing, Laravel, Android, AI Development, App Development, Mobile Development, iPhone, and Mobile App Development. I have carefully reviewed your project requirements and am confident in my ability to upgrade your existing app to the latest platform version seamlessly. I propose to rebuild the app on the newest SDK or framework version, ensuring zero build errors, resolving any post-upgrade issues such as crashes or slow-downs, and providing a detailed change log outlining all modifications made. If you are interested in proceeding with this maintenance pass and wish to discuss further, please initiate a chat. Cheers, Vishal Maharaj
$250 USD in 5 days
5.1
5.1

Hi there, I have solid experience upgrading mobile apps to the latest SDKs, resolving compatibility issues, fixing crashes, and optimizing performance without breaking existing functionality. I also provide clear change logs so you have full visibility into what was updated and why. If you are open to structuring this as a paid maintenance phase, even with a small initial milestone, I would be happy to get started immediately and ensure your app is stable and ready for the next phase of AI feature development. I can also share relevant project examples where I handled similar upgrades and post-launch maintenance. Let's connect to discuss and start work! Thanks Saurabh
$50 USD in 2 days
5.5
5.5

Coming from successfully completing numerous version migration projects, including both native and cross-platform mobile app development, I assure you of my ability to handle your needs expertly and professionally. With 14+ years in the field, I have kept myself updated with cutting-edge tools and frameworks in the industry such as Angular, React Native & Ionic for frontend; Node.js, Laravel & PHP for backend. Thus, I am confident that I can smoothly upgrade your mobile app to the latest platform version while fixing any arising issues.
$140 USD in 7 days
5.2
5.2

Norrköping, Sweden
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Member since Nov 18, 2019
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