I am looking for an experienced mobile app developer to build a simple but innovative iOS and Android application from scratch. The app will feature a clean, modern interface with custom animations, sounds, user accounts, and a one-time lifetime purchase

@om26er

Hello, Regarding your project, i would like to discuss the app features in detail to better understand your requirements. i am a mobile applications developer and i have more than 8 years of experience developing mobile applications with backend services. i have developed many Business Solutions from scratch to Stores ready applications. i have completed more than 550 projects. i have live sample apps for you. i am super confident i will provide you best quality software services on time and on budget. Let's chat to proceed.

@diektech

Hi — Elias here from Miami. I understand you're looking to build a modern mobile app for both iOS and Android, focusing on a clean interface and unique user experiences. The goal is to create something innovative that resonates with users while ensuring ease of use. What usually matters most here is the app's performance and how well it scales with user demand. A common issue in projects like this is managing animations and sounds without compromising responsiveness. The tricky part is ensuring user accounts are secure while maintaining a seamless experience during account creation. To tackle this, I would structure the app with modularity in mind. Using Flutter allows for a unified codebase, making it easier to manage animations and UI components. I would prioritize integration with Firebase for user authentication and real-time capabilities, ensuring reliability and performance. I’ve developed similar applications where user engagement was critical, and I understand the nuances of building smooth, responsive experiences. A few questions to better understand the scope: Q1 – What specific user roles or permissions do you envision for the accounts? Q2 – Are there any third-party services or integrations you plan to include? Q3 – What are your expectations regarding the app's scalability and future feature expansions? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.

@ruchiakhani

I will work with €10 per hour I have developed 50+apps in my 9 years of career. Let’s connect to discuss more in detail

@shubhamshrimal7

Hello, Greetings Hope you are doing well. I am a Mobile Application developer with over 5 years of experience. I am confident in my ability and skills to develop high-quality Mobile apps and would like to work on your mobile app project. I will complete the work as per your requirements. I want to discuss more this project to prepare the final concept. So let’s discuss this in detail over chat then will make plans to start work on it. Waiting for your earliest reply. Thanks. Shubham

@Hammadhassan21

Greetings, I understand you need a modern iOS and Android app built from scratch with a polished UI, smooth interactions, user accounts, local storage, and a lifetime in-app purchase. I can help turn your prepared concept and designs into a high-quality mobile application. I can develop a clean, responsive app with custom animations, button interactions, haptic feedback, sound effects, secure user accounts, and a reliable architecture optimized for both platforms. I have experience building mobile applications with attention to performance, usability, and modern design standards. I can also work under an NDA and provide a clear development timeline after reviewing the complete brief. Please check out my profile to review my past projects and portfolio: https://www.freelancer.com/u/Hammadhassan21 I am available to discuss the details and can start working immediately. Hammad

@badarmadni927

As a top-rated full-stack developer with a knack for building scalable and elegant applications, I would be an excellent fit for your iOS and Android app development project. Over the years, I've gained substantial experience in creating applications with clean UI, smooth animations and robust backend architecture - all of which would be critical to ensuring your idea becomes a successful reality. One factor that sets me apart is my proficiency in building mobile apps with Flutter and React Native. With these frameworks, I can develop your app for both the iOS and Android platforms concurrently, saving you valuable time and resources. Furthermore, my expertise in utilizing & customizing haptic feedbacks and sound effects will ensure an immersive user experience that your users would love.

@kamran2012

Interesting project, Hi, I will build your iOS and Android app with custom animations, haptic feedback, sound effects, user accounts, local data storage, and a one-time lifetime in-app purchase, all matching the mockups and branding you have already prepared. On a recent cross-platform build with similar interaction details, syncing haptic timing with button animations made the whole experience feel noticeably more polished. I will apply the same attention here. Questions: 1) Are you open to Flutter or React Native, or do you require fully native (Swift + Kotlin) builds? 2) For user accounts, do you need email/password auth, social login, or both? Share your mockups (happy to sign an NDA first) and I will outline a milestone plan by tomorrow. Ready to start whenever you are. Kamran

@n2rtechnologies

Hi, I've built similar iOS and Android apps with custom animations and in-app purchases before. Your mention of a lifetime purchase model is smart — I'll make sure the transaction flow is bulletproof. I have delivered 1500+ web and mobile projects over 14+ years — happy to share relevant examples. Let's get this built. When works best to chat? Regards, Nurul Hasan

@gotucat

Hi, I reviewed the project and the main goal is to build a simple but innovative iOS and Android app from scratch with a clean UI, smooth animations, sounds, user accounts, and a one-time lifetime purchase. I’ll deliver with Flutter, focusing on Mobile App Development, crafting a crisp UI / User Interface and native-like animations, integrating custom button interactions, haptic feedback, and local data storage, while aligning with your concept and NDA before sharing the full brief. I guarantee quality, responsiveness, and clean work with easy maintenance and seamless updates. Best regards. Let’s discuss here now.

@zainalitariq245

Hey, I will build your iOS and Android application from scratch with a clean, modern UI, smooth animations, custom interactions, haptic feedback, sound effects, user accounts, local data storage, and a seamless one-time lifetime in-app purchase. I’ll follow your branding, logo, and screen mockups to deliver a polished and engaging user experience. I will handle the complete development process, including scalable architecture, responsive UI implementation, performance optimization, testing, and deployment-ready builds for both platforms. I’m happy to sign an NDA before discussing the project, and I’ll maintain clear communication with regular progress updates throughout development. Could you share the screen mockups and your preferred technology stack (Flutter or native) after the NDA so I can provide an accurate timeline and development plan? Portfolio: https://www.freelancer.pk/u/zainalitariq245 Best Regards: Zain Ali

@webnautical

As a professional app developer with over a decade of experience in iOS and Android development, I believe my skills and expertise align perfectly with your project needs. My firm, Web Nautical, has conceptualized, executed, and delivered 100+ successful digital projects just like yours. We have also ventured into AI technology more recently, which can provide your app with that competitive edge. The team at Web Nautical holds an in-depth understanding of creating clean UI, smooth animations, custom interactions, efficient local data storage- all of which are essential aspects listed in your project description. In addition to this, we are experienced in incorporating unique features like haptic feedback and sound effects to enhance the overall user experience. Being versed in widely used frameworks like React Native and Flutter, we deliver cross-platform native apps that result in significant time and cost savings for our clients. Our proficiency in managing concurrent projects ensures I will work diligently towards realistic deadlines for your application. So why not transform your vision into a reality with a highly trusted and reliable freelancer like me?

@codefusion53

Hi I understand you are looking for a hands-on developer to build a simple but innovative iOS and Android app from scratch, using your existing branding and mockups, with a clean modern UI plus custom animations, sounds, haptic feedback, user accounts, local data storage, and a one-time lifetime in-app purchase. I’m Justin G., an AI and web developer who also builds user-focused mobile experiences. My approach is to turn the visual concept into a stable, production-ready app by mapping each interaction (animations, button states, audio/haptics) to clear UI behaviors, then wiring accounts and entitlements so the paid access works reliably. For delivery, I’d start by confirming the screens and core flows from your mockups, then build the iOS/Android app UI layer with the custom interactions, followed by authentication + local persistence, and finally integrate the lifetime purchase flow and entitlement checks. The outcome is a working mobile app that matches your concept and a repeatable checklist of every required screen and purchase edge case. If helpful, I can also provide a short handoff doc covering the UI interaction rules, purchase validation logic, and how your branding assets are applied across the app. Best, Justin

@Hubready

Hello!, This is James from Hollywood... I read your project description carefully, and I understand you want a simple but innovative iOS and Android app with a clean modern UI, custom animations, sounds, user accounts, and a one-time lifetime purchase. That’s a clear product direction, and I like that the focus is on polish and smooth user experience. I have about 15 years of experience in mobile app development, UI/UX, Flutter, Firebase, and app architecture. I’ve built cross-platform apps that needed strong performance, clean structure, and a premium feel. My approach would be: 1. Confirm the core user flow and purchase logic 2. Plan the UI and animation style 3. Build the app in Flutter with Firebase auth/backend 4. Integrate lifetime purchase flow 5. Test on iOS and Android, then polish details A few relevant examples of my work: - A wellness habit tracker with sound feedback and account sync - A booking app with animated onboarding and login - A subscription content app with Firebase auth and clean UI - A productivity app with custom transitions and offline support Could you please clarify the following questions to help me better understand the project? 1. What is the core action you want users to do most often? 2. Should the lifetime purchase use Apple/Google in-app purchase, or another flow? 3.

@gutibs

Hi! Sounds like a solid base to work from — having the mockups and branding ready makes a real difference. A couple of things before diving in: the budget range listed (250–750 EUR) is on the tight side for a cross-platform app with accounts, in-app purchase, animations and sound — want to make sure we're aligned there before going further, because I'd rather be upfront than quote something unrealistic. On the concept side, totally fine with an NDA before you share the brief — no issue there. We'd build this with Flutter, which covers iOS and Android from a single codebase and handles custom animations and haptics really well. Firebase would take care of accounts and data sync. The one-time lifetime purchase is doable through the native stores (App Store / Google Play). A few things I'd want to know once you share the brief: how many screens roughly, any backend logic beyond user accounts, and whether the animations are UI transitions or something more complex? Happy to keep chatting to see if there's a fit. Gustavo & the DoTheCode team

@jcrbahia

Haptic feedback, custom sound effects and a one-time lifetime purchase are the details that separate a polished app from a generic one — worth planning carefully from day one. - Flutter for a single codebase across iOS and Android, with Firebase Auth and Firestore handling accounts, plus local storage (Hive or SharedPreferences) for offline-first data and fast screen loads. - Lifetime purchase logic tied to Firebase for entitlement checks, using either RevenueCat or native StoreKit/Play Billing — which do you prefer, given your mockups are already locked? - Sound and haptic feedback built as a shared service layer so button interactions stay consistent across every screen without duplicating code per widget. Delivery fits your 2-week timeline. Treat this amount as an initial, orientative reference for the scope as described — I'll confirm the exact figure once we review the full brief and NDA details. Happy to share relevant portfolio items from my Freelancer profile, and open to a quick 15-minute call here on Freelancer to align on the IAP provider and data model before we start.

@techplusintl

Hi, To build a simple, modern iOS and Android application, I will leverage the latest frameworks and technologies to ensure a clean UI and smooth animations. I will implement custom button interactions, haptic feedback, and sound effects to enhance user experience. User accounts will be managed securely, and local data storage will be utilized for efficient performance. The one-time lifetime in-app purchase will be integrated seamlessly. I have extensive experience in mobile app development and can provide examples of similar apps I have built upon request. Happy to discuss the details.

@a4logic

Having been in the technology industry for years, my team at Our Software possesses a wealth of experience when it comes to mobile app development. We stay up-to-date with the latest technological advancements and have successfully crafted numerous iOS and Android applications. The fact that you already have the concept, branding, logo, and screen mockups prepped is fantastic as it gives us a clear vision to work towards. One thing you're probably looking for is examples of similar apps we've built. One of our notable projects in this domain was developing a recipe management application with native mobile functionality, user accounts, and a one-time lifetime purchase option. This involved ensuring a clean UI, fluid animations, button interactions and effective local data storage - which we executed successfully. Overall, we are well equipped to replicate this level of precision and innovation on your project as well. If you choose us for this project, we guarantee dedication towards turning your concepts into reality. We take every project size seriously and approach them all with meticulous attention to detail and in your case, I assure you that our team will do everything possible to create an app that will "WOW" not only you but also your users. Let's chat further about your project timeline - rest assured, we understand the value of time and will work accordingly to deliver a high-quality app on schedule!

@flapjakc

Hi, Mateo here from Toronto. Flutter is my mobile stack - I've shipped apps to both App Store and Google Play, including a marketplace platform with user roles, real-time features, and custom UI. For this build: Flutter for the animation layer (custom transitions, button interactions, haptic feedback via the HapticFeedback API, sound via audioplayers), Firebase Auth for user accounts, Hive or SQLite for local storage, and RevenueCat for the lifetime one-time purchase - it handles IAP validation across iOS and Android without maintaining server-side receipt logic on your end. Lifetime IAP has a few edge cases worth planning early: restore purchases flow, family sharing behaviour on iOS, and the non-consumable product type configuration in App Store Connect and Play Console. I've done both stores before. I can sign the NDA and review the brief - what's the general category of the app?

@mahig47

Hello! As per your project post, you are looking to build a modern cross platform mobile application for iOS and Android from scratch with a polished user experience, premium animations, intuitive interactions, and a secure one time lifetime purchase model. The objective is to transform your existing concept, branding, and screen mockups into a high quality production ready application while maintaining flexibility for future enhancements. My focus will be on developing a Flutter based application featuring a clean and responsive UI, custom animations, smooth button interactions, haptic feedback, sound effects, secure user authentication, local data storage, one time lifetime in app purchase integration, and a scalable architecture that ensures excellent performance across both iOS and Android. I specialize in Flutter, Dart, Firebase, mobile UI and UX development, in app purchases, local storage, custom animations, and cross platform application development. My focus will be on delivering a premium, performant, and intuitive mobile experience that aligns with your vision while providing a solid foundation for future updates. Let's connect to discuss your concept, review the mockups under NDA, and create a high quality mobile application that delivers a premium user experience. Best regards, Nikita Gupta.