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The project is to build a production-ready mobile application that handles sensitive legal content and must therefore meet stringent security standards. The app will ship on both iOS and Android from a single, maintainable code-base, and I expect full parity in features and polish across the two platforms. Core features I have already defined: • User authentication: every action inside the app happens behind a robust sign-in wall, with options for biometric unlock where the OS allows. • Data encryption: all stored or transmitted data—documents, user profiles, metadata—must be encrypted at rest and in transit using current best-practice algorithms (AES-256, TLS 1.3 or better). • Legal document management: users will be able to import, view, tag, and search legal documents; edit access is role-based, and a tamper-evident audit trail must log every change. High-level scope 1. Architecture and code: clean, modular, and documented so an internal team can extend it later. Preferred stacks are Swift/Kotlin or a cross-platform solution such as Flutter or React Native if the final binaries remain fully native in look and feel. 2. Security first: I will request a basic penetration test report or equivalent evidence that common vulnerabilities (OWASP Mobile Top 10) have been mitigated. 3. Compliance: the app should be structured so it can pass Apple App Store and Google Play review without legal or privacy concerns. 4. Handoff: provide the compiled apps, all project files (source code, assets, build scripts), and a short deployment guide. Acceptance criteria • Both builds install and run without crashes on current OS versions back to iOS 15 and Android 10. • A test document uploaded on one device appears, fully encrypted, on a second device after authentication. • Audit trail entries display exactly who performed which action and when, with no gaps. • All text strings and legal disclaimers are editable from a single JSON or localization file. I will be available for quick feedback loops on design, workflow, and legal copy, and I expect transparent progress updates so we can keep development agile and efficient.
Project ID: 40534019
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82 freelancers are bidding on average ₹26,689 INR for this job

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert
₹25,000 INR in 7 days
7.0
7.0

Hello, I have 8+ years of experience in developing secure, enterprise grade mobile applications using Flutter, iOS, and Android technologies. I can build a production ready legal document management app with a strong focus on security, compliance, and scalability. ✔ Cross-Platform Flutter Development (iOS & Android) ✔ Secure Authentication & Biometric Login ✔ AES-256 Encryption & TLS 1.3 Security Standards ✔ Role-Based Access Control ✔ Legal Document Management & Search ✔ Tamper-Evident Audit Trail ✔ OWASP Mobile Security Best Practices ✔ Localization & Centralized Content Management ✔ Complete Source Code, Documentation & Deployment Support Our development approach emphasizes clean architecture, secure data handling, regulatory compliance, and maintainability, ensuring a reliable solution that meets your acceptance criteria and supports future growth. Let's connect Thanks.
₹30,700 INR in 6 days
7.3
7.3

Hi, We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on Mobile App Development, iPhone, Android, iPad, iOS Development, Flutter, Security, Android App Development Lets connect in chat so that We discuss further. Regards
₹12,500 INR in 3 days
6.3
6.3

Hello, I’ve gone through your project details and this is something I can definitely help you with. I have 10+ years of experience in mobile and web app development, working with Flutter, Android, iOS, React, Node.js, and APIs. I focus on clean architecture, scalable code, and clear communication to ensure the project runs smoothly from start to finish. I will first review your requirements, suggest the best technical approach, and then proceed with development while keeping you updated at every stage. Here is my portfolio: https://www.freelancer.in/u/ixorawebmob I’m interested in your project and would love to understand more details to ensure the best approach. Could you clarify: What are your priorities for security features and user experience in the app? 1. Do you need this for mobile, web, or both? 2. Do you already have UI/UX designs or should we create them? 3. Will there be any third-party API or payment gateway integration? 4. What is your expected timeline for completion? 5. Are there any reference apps or websites you like? Let’s discuss over chat! Regards, Arpit Jaiswal
₹27,750 INR in 51 days
7.5
7.5

Hi I have read your requirements and I am sure I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. Please consider me and initiate a chat for further detailed discussion. Regards, Anju Logical Soft Tech Pvt Ltd, Indore(M.P)
₹25,000 INR in 12 days
6.6
6.6

Hi, I have experience building secure mobile apps with Flutter/React Native, authentication, biometrics, encrypted storage, document management, role-based access, audit logs, and app store deployment. I can develop a production-ready iOS/Android app with strong security practices, clean architecture, testing, and complete source code handoff. Best regards, Mehboob Ali
₹29,000 INR in 7 days
6.0
6.0

Hi, I can build your secure Flutter-based iOS and Android app with biometric authentication, AES-256/TLS 1.3 encryption, role-based legal document management, search, tagging, and a tamper-evident audit trail. The project will include clean, documented code, security testing, complete source files, and deployment documentation. Best regards, Sohail
₹25,000 INR in 7 days
5.4
5.4

Hi! I reviewed "Secure Legal App Development Needed" and I'm confident we can build exactly what you need. We have deep experience in mobile app development for Android and iOS—native and cross-platform—using Mobile App Development, Android, iOS Development, Flutter, Android App Development. Our apps are fast, intuitive and beautifully designed, with smooth performance and secure backends. From concept to App Store launch, we handle it all. Let's connect to discuss your idea and roadmap. Thanks!
₹30,000 INR in 7 days
5.2
5.2

Hello, Your project is a security-first legal document application, where correctness, encryption, and auditability are more important than anything else. I understand this is not a standard app — it requires production-grade security, compliance readiness, and strict data integrity across iOS and Android. I will build this using a single cross-platform codebase (Flutter or native Swift/Kotlin if needed) with full feature parity across both platforms. My approach prioritizes: Secure authentication with biometric unlock support End-to-end encryption (AES-256 at rest, TLS 1.3 in transit) Role-based legal document management system Tamper-evident audit trail for all user actions Clean modular architecture for long-term internal scaling App store compliance (Apple + Google Play ready structure) For validation, I will ensure: Cross-device encrypted document sync after authentication Full audit history tracking (who/what/when) Stable performance on iOS 15+ and Android 10+ Centralized config system for legal text and disclaimers I will also provide full source code, build files, deployment guide, and documentation for internal extension. If aligned, I can begin immediately with architecture design and security planning phase. Regards Abhishek
₹25,000 INR in 7 days
5.5
5.5

As an experienced mobile and web app developer, with a specific focus on Android, iOS, and Flutter, I understand the importance of stringent security, especially when handling sensitive legal content. I have in-depth knowledge of encryption practices and can guarantee your data will be encrypted at rest and in transit using industry best-practices algorithms like AES-256 and TLS 1.3 or better. My dedication to creating clean modular code with robust document management protocols means I can provide you with the peace of mind you need for this particular project. I also appreciate the importance of meeting compliance standards when it comes to app stores. My extensive experience working with iOS and Android makes me adept at structuring apps that'll thrive during the review period without any legal or privacy concerns. In addition, I am adept at handling cross-platform solutions such as Flutter while ensuring the final products remain fully native in look and feel. Finally, my long-term commitment to client satisfaction means that I will be available for quick feedback loops throughout the development process, guaranteeing agile and efficient progress while keeping you fully involved. Let's turn your idea into a reality! I look forward to showing you my capabilities in creating a secure legal app
₹25,000 INR in 7 days
5.3
5.3

Mobile legal apps like this live or die on security architecture. User auth (with biometrics), full encryption (AES-256/TLS 1.3), secure document sync, tamper-evident logs, and editable localization are all tasks I’ve shipped before. My team delivered a legal SaaS web app recently—full audit trails, role-based access, full compliance, production deployment—at legaladviceindia.com. For mobile, I use Flutter and Dart with platform channels for native biometrics, encrypted local storage, and strict code modularity so later teams can maintain or extend with minimal friction. We’d wire up OpenID Connect, document encryption at rest (sqlcipher/pinned), and run a penetration test suite—I provide a summary report against OWASP Mobile Top 10. Do you already have a compliance/legal review standard I need to match, or do you want the baseline App Store/Play Store policies handled as a default? Pradeep
₹25,000 INR in 7 days
4.5
4.5

With my solid background at some of the best names in the industry—Google and Apple—I bring deep expertise in building secure, market-leading applications, a skill set that I believe is a perfect match for your project. Especially given the sensitive nature of the legal content, I fully understand and appreciate the stringent security standards it must meet. I can assure you that I'm well-prepared to adhere to those requirements and deliver a robust app by encrypting all data at rest and in transmit, alongside providing proper authentication measures. My experience with both native iOS and Android development will guarantee not only full-feature parity but also exceptional quality, paralleling your requirements. If necessary, I'm open to utilizing cross-platform solutions such as Flutter or React Native to ensure aesthetic uniformity while maintaining native-like performance. Rest assured, even with cross-platform tools in play, maintainability and quality will never be compromised. Moreover, I am someone who believes in deeply understanding the client's needs before embarking on any project. And your requirement for quick feedback loops resonates with me profoundly. Alongside my transparent and client-centric development process that includes regular progress updates, I guarantee not only an efficient delivery but also complete satisfaction throughout the project journey. So let's tokenize all those legal documents efficiently without ever compromising their security!
₹25,000 INR in 7 days
4.4
4.4

A tamper-evident audit trail plus AES-256 at rest and TLS 1.3 in transit is the right bar for legal content — and it's the part most teams underestimate, so that's where I'd start. At Apie Technologies we've built mobile apps for 8+ years, including a legal-consulting app with role-based document access and a healthcare app where we shipped encrypted record sync with a full audit log to clear compliance review. Both went live on the App Store and Play Store with no privacy rejections. I'd build this in React Native with a fully native feel: biometric unlock via the OS keystore/Secure Enclave, encrypted local storage plus encrypted document blobs, and a single JSON localization file so every disclaimer stays editable. I'll include an OWASP Mobile Top 10 mitigation note at handoff. Should the encrypted document sync run through your own backend, or should we stand up that sync layer too? Ping me and we'll map it out.
₹25,000 INR in 21 days
4.4
4.4

Hi, there. Your legal application requires a strong balance of security, usability, and long-term maintainability, which aligns well with my experience developing secure mobile applications that manage sensitive business and document-based data. I have worked on cross-platform and native mobile solutions involving encrypted storage, role-based access control, secure authentication, audit logging, document management, and compliance-focused architectures. In previous projects, I have implemented biometric authentication, end-to-end data protection, secure API communication, and detailed activity tracking to meet strict security and operational requirements. For your project, I would design a modular architecture that prioritizes security from the ground up, including encrypted data storage, secure transmission protocols, robust authentication workflows, role-based permissions, and tamper-evident audit trails. The document management system would support efficient upload, search, tagging, synchronization, and controlled access while maintaining a seamless experience across both iOS and Android platforms. My development approach includes secure coding practices, vulnerability mitigation aligned with OWASP recommendations, comprehensive testing, and clear documentation to support future enhancements by your internal team. Thanks.
₹12,500 INR in 2 days
3.9
3.9

Hi, I specialize in building security-hardened applications. CEH-certified, 10+ years experience, 109 projects, 4.9 rating, Preferred Freelancer. For your legal app handling sensitive content, security is paramount. I'll implement end-to-end encryption for data at rest and in transit, role-based access control, secure authentication with biometrics, audit trails, and ensure compliance with data protection standards. Cross-platform development with Flutter or React Native for iOS/Android parity. I've built secure apps for clients in healthcare and finance with similar stringent security requirements. Check my profile: freelancer.com/u/ahad47 Note: This is a placeholder bid. The price is fully negotiable and can be adjusted based on the actual scope and requirements of your project.
₹37,500 INR in 14 days
3.9
3.9

Given the nature of your project, I believe I am the ideal candidate to develop a secure legal app that meets all your requirements. From the very beginning until final deployment, my team and I will ensure utmost security for every aspect of the application. We have extensive experience in mobile app development, employing robust user authentication systems with seamless integration of biometric unlock technology, exactly as you specified. Moreover, we are well-versed in implementing state-of-the-art encryption protocols (AES-256 and TLS 1.3+) in both data at rest and on transit, ensuring top-tier security for all your sensitive legal content. Our code is clean, modular, and comprehensively documented, maximizing reusability and ease of future extension and maintenance for internal teams. Having worked with Swift/Kotlin as well as cross-platform solutions, we can help you make the most informed decision to achieve complete parity across iOS and Android platforms without compromising look and feel. Our track record is further complemented by our capability to ensure compliance with Apple App Store and Google Play policies without any legal or privacy concerns.
₹25,000 INR in 7 days
3.9
3.9

As a deeply experienced and versatile developer, my skillset aligns perfectly with your ambitious project. While my key expertise lies in PHP, HTML, CSS, and API integration, I have also made sizeable contributions to mobile app development. I am not only proficient in Android app development but also well-versed in Flutter and iOS Development. With communication, collaboration, and understanding at the heart of my approach, I want to assure you that I am committed to listening intently to your unique project requirements and working diligently to actualize your vision. The fact that I've been consistently delivering top-notch solutions that align with client expectations is a testament to this commitment. In terms of compatibility with your project goals, my proficiency in incorporating APIs into applications perfectly matches your need for effective data exchange with external services. My experience in responsive web design gives me a clear understanding of the paramount importance of maintaining seamless user experiences across various devices and platforms; this aligns neatly with your demand for full parity in features and polish across iOS and Android. My proficiency with proven technologies like Git ensures streamlined teamwork and efficient development processes.
₹12,500 INR in 7 days
3.3
3.3

Hi there, To clearly lock down the SCOPE, TIMELINE, AND PRICING, I’ll need to ask a few CRITICAL QUESTYou’re in the ABSOLUTE RIGHT PLACE. I’ve successfully delivered MULTIPLE HIGH-IMPACT PROJECTS JUST LIKE THIS and know EXACTLY how to execute it FLAWLESSLY, EFFICIENTLY, AND FROM DAY ONE. IONS. Unfortunately, Freelancer’s 1500-CHARACTER LIMIT doesn’t allow me to break everything down with the CLARITY AND PRECISION this project deserves. Let’s jump on CHAT so I can show you my PROVEN TRACK RECORD, walk you through the REAL, MEASURABLE RESULTS I’ve delivered, and present a CLEAR, STRATEGIC ACTION PLAN tailored specifically for your project. You’ll immediately see why my approach is DIFFERENT, STREAMLINED, AND HIGHLY EFFECTIVE. If you’re serious about getting this done RIGHT THE FIRST TIME, I’m READY TO MOVE FAST AND DELIVER RESULTS. Looking forward to CONNECTING, COLLABORATING, AND WINNING TOGETHER. Cheers, Mayank Sahu
₹25,000 INR in 7 days
2.7
2.7

Hello, your requirements force a very specific mobile security approach, especially the "tamper-evident audit trail" plus parity across iOS 15+ and Android 10+. That usually means we cannot treat encryption and logging as add-ons, we need them wired into the data layer and auth flow from day one. I'd start by scoping the auth and storage model, then implementing encryption at rest and in transit using a single shared crypto and API contract so the same document import, tag, search, and role checks behave identically on both platforms. Next I'd build the audit trail pipeline (who, action, timestamp, before/after where relevant) with an append-only strategy and verification so you can validate "no gaps" during testing. After that, I'll ensure all UI strings and legal disclaimers are pulled from a single JSON/localization file so your legal copy updates don't require releases. For evidence, I'll provide OWASP Mobile Top 10 mitigation notes and coordinate a basic pen test report. You'll get compiled apps plus full source, build scripts, and a short deployment guide. Do you want Swift/Kotlin for truly native feel, or a cross-platform approach like Flutter/React Native as long as the binaries remain fully native in look and feel?
₹12,540 INR in 28 days
2.3
2.3

Hello, I can build your secure legal document management app for both iOS and Android using Flutter or React Native with a robust backend architecture. The platform will include secure authentication with biometric login, AES-256 encryption for stored data, TLS 1.3 for data transmission, role-based access control, encrypted document management, advanced search, and a tamper-evident audit trail. Security, compliance, and maintainability will be priorities throughout development, including OWASP Mobile Top 10 mitigation, secure coding practices, penetration testing support, and App Store/Google Play compliance. I will deliver complete source code, deployment documentation, build scripts, and store-ready application builds. I look forward to discussing the architecture, security requirements, and development roadmap.
₹40,000 INR in 7 days
1.4
1.4

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