Mobile Application .NET MAUI - Android - iOS

@Microlent

Hello, I understand that you are looking to develop a mobile application for Android and iOS using .NET MAUI and C#. Your project requires seamless offline functionality with a local SQLite database and automatic synchronization when online, along with secure login incorporating Two-Factor Authentication. Additionally, you need a map feature that supports offline use and the ability to upload the application to both Apple and Google stores. As a seasoned mobile app developer with expertise in .NET technologies and Xamarin, I have successfully delivered similar projects in the past. My approach would involve leveraging the power of .NET MAUI for cross-platform development, integrating ASP.NET Core Web API for backend connectivity, and implementing robust security measures for the Two-Factor Authentication. I invite you to open a chat so we can discuss the technical details, architecture, and development plan for your mobile application. Feel free to explore my portfolio for a glimpse of my previous work in mobile app development. Looking forward to the opportunity to collaborate on this exciting project. Sincerely, Rajesh

@starttechno

Your .NET MAUI app needs to remain dependable without connectivity, then safely reconcile data when internet returns—not simply cache a few screens. I will build the Android and iOS application in C# with a clean API/data/sync architecture, SQLite local storage, and a queued synchronization process that tracks pending changes, retries failed uploads, and handles server updates without losing local work. The ASP.NET Core Web API integration will use authenticated HTTPS requests and secure token storage. I will implement the 2FA login flow, session renewal, and protected access to local data. For mapping, I will use a provider that supports downloadable offline map regions, while keeping your locally stored points and application data available on the map with no connection. I have delivered SwiftKhata across web, desktop, and mobile, with its iOS app approved on the App Store, so I understand the practical release requirements beyond development. I will prepare signed Android/iOS release builds, assist with store listings/submission requirements, and address submission feedback where needed. Do you already have the ASP.NET Core API endpoints and 2FA provider available, or should these be built as part of the project? Muhammad Saad

@vladang

Offline maps and conflict-safe SQLite sync are the critical parts of this .NET MAUI app. I’d design the data model and sync rules first, including retries, duplicate prevention, and server-versus-device conflict handling. The MAUI project would target Android and iOS from the start, with secure 2FA, downloaded map areas, and locally stored points. My closest work includes C# cross-platform communication software for 2600Hz. The first milestone can be a working login, SQLite record flow, and API sync within four days, released only after it works. After the full build, I’ll prepare and submit it to both Apple App Store and Google Play. Which map provider do you want to use, and what data must users create while offline?

@techplusintl

Hi, I can build an Android mobile application using .NET MAUI and C#. To ensure the application connects effectively to the backend system through an ASP.NET Core Web API, I will implement a robust architecture that handles offline capabilities with a local SQLite database. This will allow the app to function without internet access and synchronize data when connectivity is restored. For secure login, I will integrate Two-Factor Authentication (2FA) to enhance security. The map feature will be designed to support offline use, ensuring that previously downloaded areas and locally stored points are accessible at all times. I recommend thorough testing of the synchronization process to avoid data loss and ensure integrity. Additionally, I will verify the offline functionality of the map and the 2FA implementation to mitigate potential risks. To get started, I will need access to your backend API documentation and any specific design preferences you may have. Thanks!

@Hubready

Hello!, This is James from Hollywood... I can help you build the .NET MAUI mobile app the right way, with a clean Android/iOS codebase in C# that connects reliably to your backend/API, stores data properly with SQLite, and stays maintainable as the app grows. What usually breaks these projects is jumping straight into UI before the data flow, auth, sync, and offline behavior are clear. I’d handle this in practical phases: 1) confirm app flow and API contract 2) set up MAUI project structure, navigation, and shared services 3) integrate backend/Web API and database logic 4) build Android first, then iOS polish and testing 5) fix edge cases, performance, and release readiness That way you get a stable app, not just a screen prototype. I’ve built production apps and platforms with tight API integration, database logic, and clean UX, including: - a field service mobile app for a local logistics team - an internal inventory tracker for a retail operator - a booking dashboard with sync and notifications - a client portal app tied to a custom ASP.NET backend A couple of quick questions so I can quote and plan this properly: 1) What exactly should the app connect to, and is the API already built? 2) Do you need offline mode or local caching with SQLite from day one? 3) Are you targeting Android only first, or full Android + iOS in the same release? If you want, send me the current backend details and I can tell you the fastest path to a clean first version.

@bcosley

Hi, I’ve built offline-capable mobile apps with SQLite, background sync to a REST API, and map support. That pattern is a good fit for your .NET MAUI Android/iOS app and its offline map requirements. Relevant experience: I’ve shipped MAUI apps with offline modes and map integration in production. Execution approach: I’d start by validating the current data flows, then enable local-only work and incremental server sync. Next, I’d implement the offline map cache and a resilient 2FA login path, with automated nightly builds and validation. One technical risk / key challenge: One challenge is keeping map tiles and points perfectly in sync with server state during intermittent connectivity. Two clarification questions: What should happen to locally created records during long offline periods when the server becomes reachable again? Do you have an existing identity provider and 2FA method you want to use (TOTP, push, SMS)? If we're aligned, I’d be happy to walk you through the implementation plan before we get started. Best regards, Brandon

@denisSolution

Hi, I'm Denis, a full-stack developer who has worked on offline-capable mobile applications with .NET MAUI and ASP.NET Core backends. Your project involves building a cross-platform mobile app that keeps working offline while syncing data when connection is restored. That means the local SQLite database and API synchronization layer are the core pieces to get right. The secure login with 2FA and offline map support will require careful planning around token handling and map tile caching. I recently worked on a similar system where users could continue working without internet, and changes would sync automatically once they were back online. For the map functionality, I used a tile caching strategy that stores previously viewed areas locally so the app remains usable offline. I'd start by defining the synchronization strategy—deciding which data needs to be available offline and how conflicts should be resolved. Then I'd build the core API endpoints for data fetch and sync, followed by the MAUI frontend with local storage and the map integration using a library that supports offline caching. The main risks here are around offline data consistency and map tile storage size. We'll need to implement conflict resolution for when the same record is modified both offline and on the server, and set reasonable limits on cached map tiles to avoid excessive storage usage. I can start working right away. Let's connect and discuss the details. Thanks, Denis.

@Fawadkaleem

Being a Mobile App Developer with over 6+ years of experience and successfully delivering countless applications for both iOS and Android, I can assure you that your project will be handled with the utmost professionalism, expertise, and efficiency. I have extensive knowledge in building mobile apps using .NET MAUI and C#, as well as connecting them to backend systems via ASP.NET Core Web API — exactly what your project demands. Moreover, I am adept at creating offline functionality in mobile applications using local databases like SQLite, which ensures seamless functioning even without internet connectivity. Additionally, my experience includes implementing secure login features such as Two-Factor Authentication (2FA) to guarantee maximum data protection.

@ykarora26

With 5+ years in Android app development and expertise in .NET MAUI and C#, I understand your need for a robust mobile app that syncs data seamlessly offline. For your project, I can ensure smooth integration with ASP.NET Core Web API for backend connectivity and implement secure Two-Factor Authentication (2FA). Regarding offline map functionality, I have experience in integrating maps for offline use, including stored points and downloaded areas. How critical is the offline map feature for your app's user experience? Regards, Yogesh Kumar

@msaqibimran

Hi, the need for an offline-capable mobile application that syncs data with a server when a connection is available is crucial for seamless user experiences, especially in environments with unreliable internet. Implementing Two-Factor Authentication for secure login adds an important layer of security, which I see as a top priority for your app. To achieve this, I suggest we outline the scope, establish a solid architecture that accommodates both online and offline functionalities, build the application using .NET MAUI, and ensure thorough testing on both Android and iOS before launching on the app stores. It would be helpful to know if you already have any wireframes, a product requirements document, or user flow sketches. This will guide our development process and ensure we align closely with your vision. My approach emphasizes clean architecture and reliable performance, ensuring that the app is robust and user-friendly from day one. I focus on creating a structure that’s ready for real-world usage, particularly on the platforms we've discussed. I’d like to connect to discuss your timeline and any budget considerations, so we can map out the next steps effectively. Regards, Mohammad

@godesignpk

Hi, I've reviewed your requirements for the mobile application using .NET MAUI and C#. I can help you build a robust Android app that seamlessly connects to your backend via ASP.NET Core Web API, ensuring offline functionality with SQLite and automatic data synchronization when online. To kick off, I suggest confirming the core user flows and defining the specific data that needs to be synchronized. This will help in structuring the API and local database effectively. What features are most critical for your initial launch? Portfolio: 1. Baseflow (WordPress, SaaS, Technology, Workflow Management) — showcases backend integration and user management. Waqas & GoDesign Team Best regards, Waqas & GoDesign Team

@Muhammadzeesha59

Hello Sir/Mam Just checked your project description about the development of a Mobile application. Developed Android and iOS applications for worthy clients like you on this platform our team is leading and on the top. Consider us for your project and i promise we won’t let you down. iOS Design and Development , Android Design and Development etc Please check my profile once for reference and expertise. It will be done perfectly Because , I am perfect on it ╰┈➤Android Studio, Native, Flutter , Dart , Firebase etc. Thank you

@naminghn

Hi there, I see you want to develop an Android app using .NET MAUI that synchronizes with a backend ASP.NET Core Web API and requires offline functionality through SQLite. I can help you build a robust application that meets these specifications. My approach will ensure secure logins with 2FA and offline map support, aligning perfectly with your requirements. Your satisfaction is my priority and I guarantee that I will deliver you a high-quality result. Regards, Ali

@albertc1996

Hello, you need a cross-platform field application that remains useful offline, securely syncs changes with the ASP.NET Core backend, and is ready for both Apple and Google stores. Which data entities and conflict rules should the offline sync support when the same record changes on the device and server? Which map provider and offline download approach do you prefer, and should users select areas themselves or receive predefined regions? Will 2FA use authenticator codes, SMS, or another provider, and are the Apple and Google developer accounts already available? I have 7 years of experience building REST and GraphQL APIs with Node, Express, TypeScript, MongoDB, and PostgreSQL, including offline-friendly data flows, authentication, and automated testing. I can also bridge into ASP.NET Core and C# for the API integration, while helping structure the SQLite sync layer, map experience, and store releases. I have worked on business applications with secure accounts, local persistence, API-driven workflows, and deployment requirements. I would be glad to turn this into a dependable Android and iOS release.

@NEHABHAT92

With almost a decade of experience in web and mobile application development, I am confident in my ability to tackle your project head-on. My proficiency in Android, iOS, Java and .NET technologies make me an ideal candidate for building a multi-platform app using .NET MAUI - Android - iOS - C#. Data synchronization and offline capabilities are areas where I have excelled in the past. For instance, I have previously used local SQLite databases and implemented seamless synchronization with backend servers to ensure smooth user experiences both online and offline. This will be especially valuable for you as you're looking for a feature-rich app that can work offline using locally cached data and then update the server with changes upon reestablishing internet connection. Furthermore, by incorporating secure login with Two-Factor Authentication (2FA) into many of my projects, I am well-versed with industry best practices regarding security.

@chiragpipal

⚠️ If you're not happy, you don’t pay. ⚠️ Hi, Thank you for checking my proposal and sharing the detailed project brief. I can build your Android mobile application using .NET MAUI and C# with a secure, user-friendly design. I will deliver: • User authentication with Two-Factor Authentication (2FA) • Offline capabilities using a local SQLite database • Automatic data synchronization with the ASP.NET Core Web API • Map integration with offline use for downloaded areas and points • Seamless deployment to Apple and Google app stores You will also receive: • Comprehensive documentation • Post-launch support I am confident I can execute your vision professionally and efficiently. Looking forward to discussing the timeline and next steps. Best regards, Chirag.

@AndrewJSMAN

I’ve built offline-first .NET MAUI apps with ASP.NET Core backends and SQLite sync pipelines before, so this is straightforward. I’ll scaffold a .NET MAUI project, wire up the ASP.NET Core Web API client with Polly for retry logic, implement local SQLite storage via Entity Framework Core, and add conflict-free sync using Change-Tracking or a custom timestamp-based resolver. Two-factor auth will be handled by ASP.NET Core Identity with Authenticator or SMS provider integration. The map will use Offline Maps API (Google or Mapbox) with tile caching and pre-download regions; points will sync via the same SQLite backend. Store uploads are handled through fastlane scripts for Google Play and App Store Connect API for Apple—builds are versioned and signed automatically. I can start immediately. Thanks, Andrii.

@NehalSK

Hi. I can build your cross-platform app using .NET MAUI and C# with an ASP.NET Core backend. I will set up local SQLite storage with auto-sync when online, integrate 2FA authentication, configure offline-capable maps, and handle deployment to the Apple and Google stores. I can start right away. Send me a message with the details and I can get started. cheers Nehal

@jordanrafael7

Hello, I see you are looking to develop a mobile application for Android using .NET MAUI and C#. My goal is to help you create a reliable and effective app that meets your specifications. I have extensive experience in mobile app development, specifically with C# programming and the .NET framework. This aligns perfectly with your need for building a robust Android application. My background in backend development will also ensure smooth integration with any required database functionalities, including SQLite, which is essential for local data storage. - I will start by analyzing your project requirements to establish a clear roadmap for development. - Next, I will set up the development environment using .NET MAUI, focusing on ensuring compatibility across Android devices. - Finally, I will implement features and perform rigorous testing to address any issues before deployment. Could you share more details about the specific features you'd like the application to have, and if there are any existing APIs to integrate? I am ready to start immediately and can discuss the project further through Freelancer messages. Best regards, Jordan Rafael