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I need a complete utility app that makes creating, organising, and tracking tasks effortless on both iOS and Android. Users should be able to add tasks quickly, set reminders, group items into projects, and view progress at a glance book clients. Clients can book using its and check in on arrival. Clean offline-first data storage, fast cloud sync, and push notifications for due dates are essential. I’m leaning toward a single shared codebase—Flutter or React Native are fine—but I’m open to separate Swift and Kotlin builds if that keeps the interface perfectly native on each platform. A fluid, distraction-free UI is critical: dark/light modes, drag-and-drop re-ordering, swipe actions, and accessibility compliance must be baked in from the start. I will provide rough wireframes; you’ll own the pixel-perfect design, implementation, and app-store-ready builds. Deliverables • Interactive Figma (or comparable) design mock-ups • Source code with clear commit history and documentation • Testflight and Google Play internal test releases • Final binaries ready for App Store and Play Store submission, with support during review Acceptance criteria 1. Task creation, editing, reminder, and completion flows work flawlessly offline and online. 2. Sync speed under two seconds on a stable connection. 3. No critical bugs in a five-day beta window. If you have recent experience shipping productivity or task apps, especially cross-platform, let’s make this happen.
Projekt-ID: 40081051
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181 Freelancer bieten im Durchschnitt $94 USD/Stunde für diesen Auftrag

Hello, I’m excited to help build your Cross‑Platform Task Management Utility with a clean, distraction‑free UI and reliable offline-first storage. I’ll use a single shared codebase (Flutter or React Native) to deliver fast, native-feel experiences on iOS and Android, with optional native modules if needed for parity. The app will support quick task creation, reminders, project grouping, progress at a glance, and cloud sync with push notifications for due dates. Offline storage will keep you productive, and on reconnect, data will sync with conflict handling. The UI will include dark/light modes, drag‑and‑drop reordering, swipe actions, and accessibility from the start. I’ll transform rough wireframes into pixel‑perfect UI, ensure robust state management, clear commits and documentation, and prepare app-store ready builds with TestFlight and Google Play internal tracks. Deliverables include interactive design mocks, source code with history, and final binaries with review support. What is your preferred shared codebase (Flutter vs React Native) and any requirement for native parity? Do you want full offline-first operation with automatic conflict resolution when syncing? What data model fields do you want for tasks, projects, reminders, and check-ins (e.g., due date, priority, status, history)? Push notifications: types, scheduling, localization, do-not-disturb windows, and platform considerations? Accessibility targets and performance metrics (screen reader support, drag
$25 USD in 22 Tagen
8,9
8,9

Hello , Nice to meet you! I will design and develop TASK MANAGMENT mobile application with web admin panel according to your requirement , ping me on chat so we can discuss this more. I am expert and 9 years experienced Android /iPhone app developer with backend work that you are looking for. I will provide you perfect product as you want so you would be happy with it. I am always ready to discuss about your project in detail as well as start from right now. The following are my services that i provide :- 1. Daily or Weekly update. 2. Clean and Robust code. 3. Responsible for communication for more than 15 to 20 hours each day. 4. Free Bug-Fix support for 1 year after completion. 5. Source code delivery. You can have a look at my profile by this link : https://www.freelancer.com/u/shyamvijaywargiy Let's contact me to discuss further details with me. Thanks Shyam
$15 USD in 40 Tagen
9,0
9,0

A Warm Hello! We are readily available to start working on this project! We are confident to provide you high-quality productivity and utility applications for both iOS and Android. Your vision for a fast, offline-first task management app with a clean, distraction-free interface aligns closely with the type of products we design and ship. Key Points: • Quickly create, edit, and complete tasks • Organize tasks into projects • Set reminders and receive push notifications • Track progress at a glance • Book clients and allow them to check in on arrival • Work seamlessly offline, with fast and reliable cloud sync when online We’d love to help you bring this utility app to market with the performance, polish, and reliability it deserves. Regards Ana
$20 USD in 40 Tagen
8,9
8,9

Hello, I can design and develop your cross-platform task and client-booking app for iOS and Android, with a focus on fast offline-first data handling, seamless cloud sync, push notifications, and a fluid, distraction-free UI supporting dark/light modes, drag-and-drop, and accessibility compliance. A few clarifying points: 1. Maximum number of users and projects to size offline sync and cloud infrastructure? 2. Do you want integrated calendar/notification permissions handled automatically per platform? 3. Are client bookings tied to user tasks/projects or a separate module? Our team includes experienced Flutter/React Native developers, mobile UI specialists, and backend engineers familiar with offline-first sync, push notifications, and app-store submission processes. We deliver pixel-perfect builds, TestFlight/Play Store test releases, and full documentation. Let’s chat to confirm your requirements and milestones, the bid amount is a placeholder to submit. Regards Yasir LEADconcept PS: We can share recent cross-platform productivity apps we shipped with offline sync and real-time updates.
$25 USD in 40 Tagen
8,4
8,4

HELLO, I have reviewed your requirement for a cross-platform task management utility app and understand the need for fast, offline-first task handling, cloud sync, push notifications, and a fluid, distraction-free UI. **** You may follow the project's development using the tracker. I am available for work 40 hours a week **** With 10+ years of experience in Flutter, React Native, and cross-platform mobile development, I can deliver an app with project grouping, reminders, client booking, drag-and-drop reordering, swipe actions, and accessibility compliance. I will produce interactive Figma designs, clean source code with documentation, TestFlight and Google Play internal builds, and store-ready binaries. The app will be fully functional offline and online, with sync under 2 seconds and robust task management flows. I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE, WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO PUBLISHING ON STORES. I eagerly await your positive response. Thanks, Christina
$15 USD in 40 Tagen
8,3
8,3

Hello, I am an experienced mobile app developer specializing in cross-platform apps. I have shipped several productivity and task management apps to both the App Store and Google Play, focusing on offline-first functionality, fast cloud sync, and clean, native-feeling UI. My approach: → Tech stack: Flutter with Dart, using Realm or WatermelonDB for offline-first storage, and Firebase or AWS Amplify for backend sync, native-like performance across iOS and Android with a single codebase. → Design execution: Translate wireframes into high-fidelity Figma prototypes with dark/light mode variants, then implement pixel-perfect UIs compliant with WCAG accessibility standards. → Delivery pipeline: Clean Git workflow, comprehensive documentation, CI/CD setup for automated TestFlight and Play Console deployments, plus support through app review processes. Regarding the booking feature, I’d like to clarify whether client booking/check-in is separate or integrated with task management to provide an accurate timeline and cost. I am confident I can meet all your deliverables and acceptance criteria, including flawless offline/online flows, sync under 2 seconds, and no critical bugs during beta testing. I’d be happy to walk you through my portfolio and discuss your feature priorities. When would be a good time for a brief call? Best regards, Niral
$15 USD in 40 Tagen
8,2
8,2

Hello, HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT I have 9+ years of proven experience delivering cross-platform productivity apps and fully understand the performance, UX, and reliability you’re aiming for. The goal is to build a fast, offline-first, user-centric task management app that feels native, syncs instantly, and scales smoothly across iOS and Android. AI /ML ,Cross-Platform application, React Native, Flutter , Xamarin Android Java/Kotlin, iOS Objective C /Swift/Swift UI . and Laravel MVC, React JS, Node.js PHP, Angular, WordPress, MySQL, and MongoDB. Core features -->> Task & project management -->> Offline-first storage -->> Fast cloud sync -->> Reminders & push notifications -->> Drag/drop & swipe actions -->> Dark/light mode My approach uses clean architecture, shared codebase (Flutter/React Native), efficient sync logic, accessibility-first UI, and app-store-compliant builds. Let’s connect in chat as I have a few questions about sync strategy, notification logic, and design preferences to proceed further. Thanks, Julian
$25 USD in 40 Tagen
8,4
8,4

Hi, this is Elias from Miami. I’ve reviewed the project, and from what I understand, you’re looking for a full-featured cross-platform task and client booking app with offline-first data storage, fast cloud sync, push notifications, and a fluid, distraction-free UI. Users should be able to create and organize tasks, set reminders, track progress, and allow clients to book and check in seamlessly. Dark/light modes, drag-and-drop, swipe actions, and accessibility are essential, and you want store-ready builds for iOS and Android. I’ve built productivity and task-management apps using Flutter and React Native, with a focus on clean offline-first architecture, sub-two-second sync, pixel-perfect UI, and smooth app-store submission. Clear documentation, well-commented code, and interactive Figma designs are part of my standard workflow. A few questions to align perfectly: Q1: Should client booking integrate with a calendar system (Google/Apple), or remain fully internal? Q2: Are reminders time-based only, or do you want location-based notifications as well? Q3: For drag-and-drop and swipe actions, any priority on which lists or screens get these interactions first? Q4: Do you prefer a single Flutter/React Native codebase, or native Swift/Kotlin if it improves responsiveness? Happy to deliver a polished, store-ready productivity app. Looking forward to hearing from you. Regards, Elias
$50 USD in 40 Tagen
7,7
7,7

Hi. Using Flutter, I can build your app for ios and android. I am very familiar with Flutter and Utility App. I have mobile and backend skills with 8+ years. I wish to work for you. Thanks for attention.
$20 USD in 40 Tagen
7,8
7,8

Dear Steven A., 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, Android, Objective C, UI / User Interface, iOS Development, React Native, Flutter 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.
$25 USD in 5 Tagen
7,7
7,7

Hello, there. I have experience delivering production-ready mobile apps using Flutter and React Native, including task-based and productivity-style applications. Two quick questions: 1. Do you already have a preferred backend or cloud service in mind for sync (e.g., Firebase, Supabase, custom API), or should I propose one? 2. Should reminders and check-ins be handled entirely on-device, or do you require server-driven notifications as well? If this aligns with your goals, I’d be happy to discuss the technical approach and timeline. Best regards, Jijo
$20 USD in 40 Tagen
7,5
7,5

⭐⭐⭐⭐⭐ We at CnELIndia, led by Raman Ladhani, can ensure the successful delivery of your utility app by leveraging our extensive experience in cross-platform mobile development and productivity tools. We will start by refining your rough wireframes into interactive Figma designs, incorporating dark/light modes, drag-and-drop, swipe actions, and full accessibility compliance. Our team will implement a Flutter-based offline-first architecture with fast cloud sync and push notifications, ensuring task flows work flawlessly online and offline with sub-two-second sync. We will maintain clear source code documentation, perform rigorous testing during a five-day beta, and deliver TestFlight and Google Play internal builds. Finally, we will handle app-store submissions and provide support during review to guarantee a polished, high-performance app that meets all acceptance criteria.
$20 USD in 40 Tagen
7,0
7,0

Hello, I will develop your TASK MANAGEMENT MOBILE APPLICATION for Android and IOS both platforms with Web admin panel. I am Tulsiram. I have 10 years of experience working as Native and Crossplatform mobile application developer. I am understood your requirements. I am glad if we are working together. If you interested then let's connect. I will provide you Daily updates ,source code after development completed, 1 Year maintenance Support in following Steps: I will available daily 10-12 hours in Working days for you. I will provide you regular updates according to which modules we will decided. After approval each module by you then i will provide your complete source code of your project and will shift on your Domain. Thanks
$15 USD in 40 Tagen
6,6
6,6

Hello! **20% discount on this bid** — we’re ready to start immediately and tackle your key pain points: **offline-first reliability, fast sync, flawless reminders, and a clean distraction-free UX**. We shipped a **cross-platform task & booking productivity app just 3 weeks ago** with offline sync, push notifications, drag-drop, and dark/light modes. **Perks:** pixel-perfect UI from your wireframes, Flutter/React Native expertise, accessibility compliance, fast cloud sync (<2s), and full App Store & Play Store support.
$20 USD in 40 Tagen
6,9
6,9

Hello, I hope you are doing well. I understand that you are looking to build a TASK MANAGEMENT MOBILE APPLICATION and I would be happy to help. I have extensive experience in designing and developing Application and have successfully delivered many projects. What I offer: -Development using the latest technologies -Daily project updates and clear communication -On-time delivery within the agreed timeline -Complete source code provided after project completion -One year of support for the developed work -10+ years of experience in web and app development -Fully responsive, fast-loading, and SEO-friendly design -A powerful super admin panel to manage the entire system Please feel free to initiate a chat so we can discuss your requirements in detail. Thank you and regards, Dheeraj K.
$15 USD in 40 Tagen
7,0
7,0

Hello There!!! ⚜⭐⭐⭐⭐⚜((Offline-first cross-platform task app with fast sync and clean UX))⚜⭐⭐⭐⭐⚜ What makes your project interesting is the balance you want between simplicity and reliability. This is not just a to-do list, it is a productivity utility that must work flawlessly offline, sync quickly when online, and feel calm and intuitive every time a user opens it. That combination requires careful architecture and thoughtful UI decisions from day one. You are looking for a shared-codebase mobile app that supports fast task creation, reminders, project grouping, and real-time progress tracking, while still feeling native on both iOS and Android. The acceptance criteria around sync speed and beta stability show that quality matters more than rushing features. I have worked on cross-platform mobile apps using Flutter and React Native where offline-first storage, background sync, and push notifications were core requirements. My approach is to design the data layer and sync logic early, then layer a distraction-free interface that supports gestures, accessibility, and dark and light modes without compromise. Three key features I would prioritise: • Offline-first task management with reliable cloud sync under two seconds • Clean, gesture-driven UI with drag-and-drop, swipe actions, and accessibility support • App store ready builds with structured testing and review support Warm Regards, Farhin B.
$15 USD in 40 Tagen
6,4
6,4

Hi Steven, We’ve built several productivity apps, including a task manager that lets users create, organize, and track tasks with reminders, projects, and progress views. We also developed a separate client-facing app for booking and checking in, which aligns perfectly with your idea of integrating client bookings. For your project, I recommend using Flutter for a single codebase that delivers a truly native experience. We can also enhance the UI with features like dark mode, drag-and-drop, and swipe actions, ensuring a distraction-free environment. Let’s schedule a 10-minute call to discuss your project in detail and see if I’m the right fit. I usually respond within 10 minutes. I’m eager to learn more about your exciting project. Best, Adil
$25 USD in 40 Tagen
5,7
5,7

Hi Steven, I will develop a cross-platform task management utility app that offers seamless task creation, organization, and tracking on iOS and Android. The app will feature quick task addition, reminders, project grouping, progress tracking, and client booking functionality. I will prioritize an intuitive UI with dark/light modes, drag-and-drop re-ordering, swipe actions, and accessibility compliance. Let's discuss this further. Regards, Sai Bhaskar
$15 USD in 40 Tagen
5,4
5,4

HELLO, WE’VE CAREFULLY READ YOUR REQUIREMENTS AND THIS IS A PRODUCTIVITY APP WE CAN DESIGN AND DELIVER END-TO-END. WE HAVE WORKED ON SIMILAR PROJECTS AND CAN PROVIDE EXAMPLES. We understand you’re looking for a clean, offline-first task management app that feels fast, intuitive, and reliable on both iOS and Android. With over 8 years of experience building cross-platform mobile apps—including productivity and utility tools—we know how to balance smooth UX with solid data handling. From quick task creation and reminders to cloud sync, push notifications, and accessibility compliance, we can take full ownership of design, development, testing, and store-ready delivery. Our focus will be on a distraction-free interface, instant responsiveness, and a sync system users can trust every day. WORKING FLOW User Input → Task Creation Users add tasks instantly, assign reminders, and group them into projects with minimal taps. Offline Storage → Local Reliability All actions work offline first, ensuring no data loss even without connectivity. Cloud Sync → Cross-Device Consistency Tasks sync securely to the cloud and update across devices in under two seconds. Task Interaction → Drag, Swipe, Complete Users reorder tasks, swipe to act, and track progress visually in dark or light mode. Notifications → Timely Reminders Push notifications alert users about due tasks and important updates. Invoke Tech
$15 USD in 40 Tagen
5,4
5,4

Hello, I can design and build a clean, offline-first task utility app for both iOS and Android, covering tasks, reminders, projects, bookings, check-ins, and real-time sync. I have strong experience with Flutter, cloud sync, push notifications, and accessibility-ready UI with dark/light modes and smooth gestures. I’ll handle pixel-perfect design, implementation, and store-ready builds with TestFlight and Play Console support. Happy to share similar productivity apps and start right away.
$15 USD in 1 Tag
5,4
5,4

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