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I am planning a professional mobile app that must run seamlessly on both iOS and Android from the very first release. The core build has three non-negotiable features: secure user authentication, reliable in-app purchases, and real-time push notifications. For the interface, I want a balanced mix—eye-catching custom screens where brand impact matters, supported by the standard UI elements users already know and trust. I’m happy to discuss whether you prefer Flutter, React Native, Kotlin/Swift, or another approach, as long as performance and store compliance remain top priorities. Deliverables I expect • Full source code with clear documentation • Tested builds ready for App Store and Google Play submission • Basic post-launch support to iron out any critical bugs If this scope aligns with your expertise, let’s talk through milestones and start dates.
Project ID: 40684255
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44 freelancers are bidding on average $427 AUD for this job

As a seasoned software team with a CMMI Level 5 certification, we believe we are the perfect match for your project. For over 12 years, we have specialized in offering top-notch mobile app solutions on both iOS and Android platforms, exactly what you require. The fact that we have shipped over 600 successful projects means we are no strangers to delivering secure user authentication, reliable in-app purchases and real-time push notifications- precisely your core requirements. One of the things clients value about us is our dedication to ensuring we communicate effectively. We provide a full team for every project which includes designers, devOps personnel and quality analysts in order to deliver a clear documentation, tested builds ready for submission and even basic post-launch support to highlight emerging bugs. With an impressive track record that includes completion of 99% of our projects, it is easy to see why businesses choose us. Choosing us means embracing the full spectrum of UI/UX design & brand identity services we offer. This means not only will your app function at an optimum level as intended but will have a visually appealing custom interface with an impactful brand portrayal. In addition, you retain full ownership of the code at any stage of our partnership without lock-in. Let's discuss the details further and get this masterpiece started!
$500 AUD in 7 days
9.6
9.6

HEY! I UNDERSTAND YOU NEED A PROFESSIONAL CROSS-PLATFORM MOBILE APP WITH SECURE AUTHENTICATION, RELIABLE IN-APP PURCHASES AND REAL-TIME PUSH NOTIFICATIONS FROM THE FIRST RELEASE. I have 12+ years of IT experience with strong expertise in Flutter, React Native, iOS, Android, API integration, authentication, payments and notification systems. I will deliver: • Production-ready iOS & Android application • Secure registration/login and session management • Apple/Google in-app purchase integration • Real-time push notifications • Custom branded screens combined with familiar native UI patterns • Responsive, smooth and scalable architecture • Store-compliant builds for App Store & Google Play • Complete source code and documentation • Testing, deployment assistance and post-launch critical bug support FLOW: Authentication → Core App → In-App Purchase → Notifications → Testing → Store Submission → Launch. I recommend Flutter for a single maintainable codebase while preserving strong native performance and platform-specific integrations. I can start immediately and work with clear milestones from development through store-ready delivery. THANKS CHIRSTINA
$250 AUD in 7 days
8.4
8.4

Hello, I am excited about the opportunity to work on the iOS & Android App Creation project. I understand the need for a mobile app that runs smoothly on both platforms with essential features like secure user authentication, in-app purchases, and real-time push notifications. With my expertise in Flutter, iOS Development, Android App Development, and React Native, I am confident in delivering a high-quality solution that meets your requirements. I plan to create a visually appealing interface with a blend of custom screens for brand impact and standard UI elements for user familiarity. I will ensure performance and store compliance are top priorities throughout the development process. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I look forward to discussing further details and milestones for this project. Best regards, Warda Haider
$250 AUD in 4 days
7.0
7.0

Hi there, I am excited about the opportunity to work on your iOS and Android app project. With over [X years] of experience in mobile app development, I am well-versed in creating apps that deliver seamless cross-platform experiences, ensuring they meet both App Store and Google Play standards. Your emphasis on secure user authentication, reliable in-app purchases, and real-time push notifications aligns perfectly with my expertise. I have successfully implemented these features in past projects, using both Flutter and React Native, to provide robust and user-friendly solutions. For the interface, I propose a design strategy that combines custom screens for brand impact with intuitive standard UI elements, ensuring both innovation and user familiarity. I am open to discussing the most suitable technology stack, be it Flutter, React Native, or native development in Kotlin/Swift, to ensure optimal performance and compliance. As part of my deliverables, I will provide comprehensive source code documentation and app builds ready for submission to both app stores, along with post-launch support to address any critical issues. Let's discuss your project milestones and timeline to get started. Looking forward to the possibility of collaborating with you. Best Regards, Efanntyo
$500 AUD in 10 days
6.5
6.5

Hi, I reviewed your request to create an iOS and Android app that works smoothly from day one, including secure user authentication, reliable in-app purchases, and real-time push notifications. I’ll build the app with React Native and Android App Development so the shared core logic stays consistent across stores, while using clean navigation and custom brand screens alongside standard UI components. I’ll also ensure App Store and Google Play compliance for sign-in flows, purchase handling, and push notification setup. I focus on quality code, clear documentation, and tested builds that are ready for submission, plus responsive post-launch bug fixes. Let’s discuss here now.
$250 AUD in 30 days
7.1
7.1

Hello!! I understand you need a complete iOS and Android mobile application built with a smooth, modern interface and reliable functionality across both platforms. * Is this a new app or an existing app that needs to be developed further? * Do you already have the UI/UX designs and feature specifications? * Will the app require APIs, payments, push notifications, or real-time functionality? The development can include responsive mobile UI, user authentication, API and backend integration, push notifications, user profiles, core app features, secure data handling, testing across iOS and Android devices, and production-ready builds for both platforms. Relevant cross-platform mobile applications have been developed with clean user flows and reliable backend integrations, focusing on consistent performance across different devices. Let us chat and discuss your features and preferred technology so we can plan the app development efficiently. Best regards Farhin B
$250 AUD in 10 days
6.8
6.8

Hello⭐️, The main challenge is delivering authentication, subscriptions, and push notifications consistently across two operating systems while keeping the codebase maintainable enough for the first release. A cross-platform architecture is appropriate here, but store billing rules, notification permissions, account security, and platform-specific edge cases need to be handled natively where required. The first milestone should establish the core architecture and implement authentication before connecting subscription and notification flows, then test the complete purchase-to-entitlement path on both platforms. The listed budget is tight for the full scope, so I would treat it as an MVP rather than attempting a broad feature set. If the supplied screenshot represents the main product flow, I can use it to keep the initial build focused on the release-critical screens. Have a nice day
$450 AUD in 14 days
5.9
5.9

As an accomplished Full Stack Developer and Mobile App Expert with over 8 years in the industry and 200+ successful projects to my name, I am confident that I am the ideal fit for your mobile app project. With my expert knowledge in Flutter, I can develop an app that will function seamlessly across both iOS and Android platforms exactly as you envisaged. In addition, my expertise in Laravel, React, PHP, WordPress and Shopify will give me a unique perspective as I build your app. I understand the importance of adhering to milestones and of creating store compliant apps that work within tight budget constraints. My clean, secure and scalable code guarantees high functionality and my attention to detail ensures smooth operations under any circumstances. Furthermore, the fact that I offer ongoing maintenance and technical support means that I'll be available to troubleshoot any issues that may arise post-launch. Lastly, I'd like to emphasize my dedication towards driving results for my clients through impactful digital solutions. Consequently, pairing this commitment with your detailed project description places us in a great position to create something exceptional together. Thank you for considering me for this project and I look forward to discussing it further with you soon.
$300 AUD in 7 days
4.8
4.8

As you've clearly outlined your project, let me assure you that I'm a seasoned Full-stack and Mobile App Developer proficient in technologies such as Android, Flutter, iPhone, Mobile App Development, React Native, among others. This means that I have the technical prowess to build your app seamlessly on both iOS and Android platforms using the appropriate tools you prefer - be it Flutter, React Native, Kotlin/Swift or another. My skills extend beyond just coding to ensuring smooth performance and store compliance - two crucial factors for your app's success. From secure user authentication to reliable in-app purchases and real-time push notifications, I am well-versed in integrating such features deeply into mobile apps. And for the interface, I completely understand your desire for custom screens with brand impact but also utilizing standard UI elements users are already comfortable with.
$250 AUD in 1 day
4.9
4.9

Hi there, Your iOS and Android app needs a clean first release with secure user authentication, reliable in-app purchases, and real-time push notifications without store-compliance issues. I’ve got strong expertise in iPhone, Android, and React Native builds like this, and I can structure the app so the branded screens feel custom while the standard UI stays familiar and stable. I’ll map the flow, implement the auth and purchase logic, wire up notifications, then test both builds for App Store and Google Play readiness with clear documentation. Best regards, Ian
$555 AUD in 4 days
4.2
4.2

Hi there, I can help you create a professional mobile app that seamlessly operates on both iOS and Android. To ensure secure user authentication, reliable in-app purchases, and real-time push notifications, I suggest utilizing React Native for its performance and cross-platform capabilities. This will allow us to achieve your goals while maintaining store compliance. I’ll deliver full source code with detailed documentation and provide tested builds, ready for submission to the App Store and Google Play. Additionally, I’ll offer basic post-launch support to ensure the app runs smoothly. Your satisfaction is my priority and I guarantee that I will deliver you a high-quality result. Regards, Ali
$250 AUD in 14 days
3.5
3.5

I can develop your mobile app to include secure user authentication and reliable in-app purchases for both iOS and Android. My first step will be to discuss your preferred framework, whether it's Flutter or React Native, to ensure we meet performance and compliance standards. Based in Toronto, I work promptly and stay responsive throughout the project.
$250 AUD in 3 days
3.3
3.3

Hello, As a result of a detailed review of your project requirements, I fully understand the scope and expectations. You need a production-ready iOS and Android application with secure authentication, reliable in-app purchases, push notifications, and full App Store/Google Play compliance. I have experience with cross-platform mobile development, React Native/Flutter, iOS and Android integrations, authentication, in-app purchases, push notifications, API integration, and mobile app testing, and I'm available to start your project right away. In my opinion, one of the key challenges is keeping purchases and notifications reliable across both platforms while correctly handling Apple and Google lifecycle, receipt, permission, and store requirements. I would use a shared cross-platform codebase with secure token-based authentication, StoreKit/Google Play Billing integration, server-side purchase validation, and FCM/APNs notifications. Custom branded screens can be combined with familiar native UI patterns for a polished experience. I have a couple of quick questions. • Do you already have the UI/UX designs and backend API? • Will purchases be subscriptions, one-time products, or both? I can deliver documented source code, tested store-ready builds, and post-launch bug support. Best regards, Carlos.
$250 AUD in 7 days
3.3
3.3

I can build your cross-platform mobile app with secure authentication, reliable in-app purchases, and real-time push notifications as core priorities from the first release. I’d recommend Flutter or React Native to maintain a single codebase while delivering smooth, native-feeling performance across iOS and Android. I’ll implement a polished UI combining custom branded screens with familiar platform patterns and ensure the app follows App Store and Google Play requirements. You’ll receive the complete source code, documentation, production-ready builds, and support for critical post-launch issues. I’m available to discuss the milestone plan, preferred technology, integrations, and start date so we can move quickly toward the first release.
$500 AUD in 7 days
3.0
3.0

Hi, I'm Denis, a full-stack developer who has built cross-platform mobile apps with a focus on performance and store compliance. Your project makes sense—seamless iOS and Android support from day one, with secure auth, reliable in-app purchases, and real-time push notifications as the core pillars. The hybrid approach you’re open to (Flutter, React Native, or native) is worth discussing early, since store guidelines and performance vary by platform. I’d start by locking down the architecture: shared backend services for auth and notifications, separate but consistent UI layers, and clear API contracts between them. The in-app purchase flow needs careful testing to avoid store rejections, so I’d build against the latest store SDKs early. Documentation and test builds will be part of every milestone to keep submissions smooth. For the interface, I’ve found that blending custom screens where brand matters with familiar UI components improves adoption without sacrificing usability. The biggest risks are usually store policy changes and payment flow edge cases. I’d handle those by building against sandbox environments first and leaving room for policy updates in the first few releases. I can start working right away. Let's connect and discuss the details. Thanks, Denis.
$300 AUD in 3 days
3.0
3.0

I have built cross-platform apps with Flutter and React Native, one codebase for both iOS and Android. To move fast I would start with a clickable prototype covering your core screens this week, then wire up the backend. I can start today. The budget and timeline here are early estimates from the post, we will lock in real numbers once we talk through the full feature list. Want me to send a quick scope doc?
$450 AUD in 21 days
2.0
2.0

For a single codebase covering both stores, I'd lean React Native with native modules for IAP and push, since StoreKit 2 and Google Billing behave differently enough that a shared wrapper saves pain later. You'll get the full RN source with docs, signed TestFlight and Play Console builds, and post-launch bug support. Auth via Firebase or your own backend, whichever fits. I can pick this up right away. 1) Which auth providers, email, Google, Apple, phone? 2) Are IAPs subscriptions, one-time, or both? Let's get this moving. Shayan
$275 AUD in 5 days
1.5
1.5

Hello I am interested in your iOS & Android App Creation project and can help build a complete mobile app solution. Key Features: • Native Android Apps • Native iOS Apps • Cross-Platform Apps • Mobile UI/UX Design • Firebase Integration • User Management • API Development • Push Notifications • Payment Gateway Setup • Real-Time Chat Features • Admin Panel • Analytics Integration • App Security • Store Deployment • Technical Support I can develop a scalable application that aligns perfectly with your business objectives. Best Regards, Naseeb A.
$250 AUD in 4 days
3.2
3.2

Hey , Good morning! I am an expert mobile software engineer with skills including React Native, Android, Objective C, iOS Development, Mobile App Development, Flutter, Android App Development and iPhone. I am checking your attachment, I'll update you shortly... Please contact me to discuss more about this project. Thanks & Regards
$250 AUD in 4 days
0.0
0.0

Hello, I’ll start by defining the authentication, purchase flow, notification architecture, and shared UI structure before choosing the final cross-platform stack. Building a polished iOS and Android app with secure login, reliable in-app purchases, and real-time push notifications from day one is the goal. I’ve worked on projects where Flutter or React Native, native iOS/Android services, authentication, App Store/Google Play billing, push notifications, and responsive mobile UI all needed to work together cleanly. I’d keep platform-specific purchase and notification logic isolated where necessary while sharing as much application code as possible for easier maintenance. Store compliance and release readiness would be built into the implementation rather than handled at the end. I’m determined to win this project and confident I can deliver documented source code, tested store-ready builds, and reliable post-launch support within the agreed milestones. Best regards.
$250 AUD in 7 days
0.0
0.0

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