Android Study Material App

@zeeshan5121472

Hello, I’m an experienced Flutter and backend developer with experience in secure document viewing, authenticated file delivery, Android `FLAG_SECURE`, iOS capture detection, and per-user watermarking. I can build the iOS/Android viewer, backend with short-lived signed URLs and access control, plus a simple admin panel for ebook management. I’ll also document the real security limits, including iOS screenshot restrictions, and provide a fixed milestone-based quote and timeline. Let’s discuss your project in chat.

@mahads31

Hey, I can build a secure cross-platform ebook reader using Flutter with a protected backend, ensuring authenticated access, per-user permissions, signed URL delivery, dynamic watermarking, and platform-specific content protection while keeping the experience smooth for legitimate users. The app will stream PDFs from a secure backend instead of storing them in accessible device storage, enforce authenticated access, disable download, sharing, printing, and text selection, and include per-user watermarks for traceability. On Android, I'll implement FLAG_SECURE to block screenshots, screen recording, and recent-app previews. The backend will support secure authentication, short-lived signed URLs, role-based ebook access, and a simple admin panel to upload books and assign them to users. I can also integrate a DRM solution if it offers a better balance of security, cost, and timeline than a custom implementation. The final delivery will include production-ready Android and iOS builds, complete backend source code, deployment documentation, security documentation outlining guarantees and limitations, and support during testing to ensure everything meets the project requirements. Could you confirm whether offline reading is completely out of scope, or would you like encrypted temporary offline access as a future enhancement? Best Regards, Mahad

@shawanay

I can develop a PDF ebook viewer app for iOS and Android using Flutter with authenticated access, signed URL-based PDF delivery, and in-app viewing only. I'll implement screenshot/screen recording protection, per-user watermarking, backend authentication with access control and admin panel for ebook management Let's connect so we can discuss more about it. Regards, Shawana

@techwelfare

Hi I will build your secure cross-platform PDF ebook reader using Flutter, featuring authenticated signed-URL streaming, text-copy restrictions, and dynamic user watermarking. The app will implement Android FLAG_SECURE and iOS screenshot/recording detection, backed by a secure backend for complete content protection. Let’s discuss more in chat to start immediately. Best Regards Techwelfare

@Kishoreindia

Hi, I'm a Flutter/Dart developer with hands-on experience building and shipping production apps across fintech, healthcare, education, and travel — currently live on both Play Store and App Store. A few examples from my portfolio: • Finnov & MinePay — fintech/payment apps with secure transactions and clean UX • PrayagEdu — school management app (Android + iOS) handling student/parent/teacher workflows • SNAH Caregiver & SNAH Users — dual-app healthcare ecosystem connecting caregivers with patients • MedNob AI & Jepluse — medical/health apps with AI-assisted features • Thatzal & Thatzal Trip — travel and trip-planning apps with booking flows • GetOurStay — property/stay booking platform • Lisners & Lisners Therapist — dual-sided therapy/audio platform for clients and therapists Across these projects, I've handled end-to-end development: clean architecture, state management (Bloc/Provider/GetX/RiverPod), REST/Firebase integration, push notifications, payment gateways, and smooth deployment to both Play Store and App Store. I focus on writing maintainable, scalable code and communicating clearly throughout — regular updates, honest timelines, and no surprises. I'd love to understand your project requirements in more detail and share how I can bring similar quality and reliability to your app. Happy to start with a quick call or share more code samples/case studies. Looking forward to working together. Best regards, Kishore Patidar

@FreeLancers360

As a seasoned full-stack developer with a specific strength in mobile app development, especially in Android and Flutter, I am confident that I am the ideal freelancer for your project. I have extensive experience in developing secure applications and working with DRM-protected document viewing. My skills in API and backend development will play an essential role in the realization of the recommended stack for your app. In prior projects, I have successfully utilized FLAG_SECURE to block screenshots and screen recording on Android. For iOS, although there's no true prevention API, I understand the importance of immediate action upon detecting screenshot events or screen recording to counter content leakage. My strong native knowledge of Kotlin paired with my adaptability in Flutter allows me to produce high-quality code that performs impressively across platforms while leveraging on each platform's unique capabilities.

@NunoMiguelPalma

Hello! Do you have documentation on the API? I can deliver the application within 2 days, using compose multiplatform. Send me a message and let’s chat

@rishi9343

As a highly experienced and versatile developer with over 8+ years in mobile app development, I am confident that I possess the skills and expertise vital for successfully executing your Android Study Material App project. Through my adeptness in using Flutter, Java, and other relevant technologies, I can deliver to you an impeccable app that enables authenticated users access to secure PDF apparels without compromising on content leakage. My proficiency in working with Flutter (which offers a single codebase framework for both iOS and Android) makes me the ideal fit for your project as it maximizes efficiency and minimizes costs. I have gathered substantial knowledge in backend development over the years, which is valuable for this project's requirement of serving PDFs via authenticated short-lived signed URLs. This guarantees minimal storage of complete PDF files in readily accessible local storages thereby enhancing security threats deterrence as intended.

@Noorulamin331

I will build your secure PDF ebook viewer in Flutter—signed-URL delivery, per-user watermarks, screenshot detection, and device security checks. Tech Stack: Flutter (iOS/Android) + Node.js backend + S3/GCS signed URLs + pdf_viewer_pro (PDFium-based) or Syncfusion. Core Features: Component Implementation Content Delivery Authenticated, short-lived signed URLs (no persistent file storage) Viewer Restrictions Download/export/share/print disabled, text selection/copy disabled, page navigation/zoom/bookmarks retained Screenshot Protection Android: FLAG_SECURE. iOS: detect userDidTakeScreenshotNotification and capturedDidChangeNotification → blur content, log event, warn user. iOS has no true prevention—detection only. Watermarking Semi-transparent per-user overlay (name/email) across each page Device Security Root/jailbreak detection (rootbeer / DTTJailbreakDetection) DRM SDK Options (optional): Readium LCP, Vitrium, or Adobe Content Server—to reduce custom development. Deliverables: iOS/Android apps, backend with signed URLs, admin panel (upload/assign), documentation (security model limitations). Explicitly Out of Scope: 100% screenshot prevention (iOS limitation), external camera capture. Need: Preferred DRM SDK, admin panel scope, any existing backend? Share details—I will begin immediately.A

@Baghali1

Hi, I can develop this application in Flutter for both Android and iOS. I have already worked on a similar education app with secure in-app PDF viewing, and I can implement the security features you require, including Android FLAG_SECURE, iOS screenshot/screen recording detection, user authentication, per-user watermarking, and secure PDF access. I also have experience with Firebase, Node.js, and FCM for backend development, authentication, APIs, and push notifications. After development, I will thoroughly test the app, provide Play Store and App Store ready builds, and assist with publishing on both platforms. Budget is 200$ .

@RohanBoy17

I can build a secure cross-platform ebook reader using Flutter with a protected backend that delivers PDFs through authenticated, short-lived signed URLs, ensuring content is viewed only within the app. The solution will implement screenshot and screen-recording protection where supported, per-user watermarking, secure authentication, role-based access, and an admin panel for managing ebooks and user permissions. I'll also provide clear documentation outlining the platform's security model, including the practical limitations of iOS screen-capture prevention, along with clean, maintainable source code, deployment guidance, and production-ready builds for both Android and iOS.

@alirashdi26

Hey , I just went through the project description, and I see you are looking for someone experienced in iOS Development, App Store Optimization, Flutter, Java, Android, Backend Development, Documentation, iPhone, Mobile App Development and API Development. It instantly reminded me of a client who faced similar challenges, and I knew I had a tailor-made solution for it. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: • Is there anything else you’d like to add to the project details? • What’s the top hurdle you’re facing with this project? • What is the timeline to get this done? Why Choose Me? 250+ Projects. 5 Years. Zero Misses. My reputation is built on a single metric: Flawless Execution. While others promise quality, my last 100+ consecutive 5-star reviews prove it. I don’t just finish the job; I set the standard. The portfolio here is just the tip of the iceberg. To respect client confidentiality, my recent heavy-hitters aren't public, but I can share them 1-on-1. Regards, Ali .

@hoangvanp

Hello, Creating a secure PDF Ebook Viewer app for iOS and Android involves ensuring that users can view PDFs in-app without the ability to download, export, or easily capture content. Implementing Flutter for a single codebase and in-app rendering of PDFs via authenticated, time-limited signed URLs are key aspects to consider. User authentication, access control, and viewer restrictions must be carefully implemented to prevent unauthorized actions. Additionally, incorporating measures such as blocking screenshots and screen recordings, watermarking, and detecting rooted/jailbroken devices are crucial for enhancing security. Based on my experience with Flutter app development and secure document viewing, I can provide insights into implementing the necessary features effectively. I would like to discuss further details regarding your specific requirements and how we can ensure a robust solution that meets your objectives. Best regards,

@sibtain0999

I have strong experience in Flutter, Android, and iOS app development, making me an excellent fit for your secure PDF eBook viewer project. Flutter allows me to deliver a high-performance application for both Android and iOS from a single codebase while maintaining a smooth user experience. I have experience building secure applications and understand content protection techniques such as Android's FLAG_SECURE, iOS screenshot limitations, authenticated access, signed URLs, and DRM-based document security. I can help implement practical solutions that prevent unauthorized downloading, sharing, screen recording, and screenshots as much as each platform allows. In addition to mobile development, I have backend experience that enables secure PDF delivery, user authentication, and time-limited access to study materials. I focus on writing clean, maintainable code and creating intuitive, responsive UI/UX that provides an excellent experience for users while keeping your content protected. I would be happy to share my portfolio of similar Flutter projects and discuss the best architecture for your application. I am confident I can deliver a secure, reliable, and user-friendly PDF viewer that meets your requirements and is ready for long-term maintenance.

@abeerahmed12

Hi, I’d love to help develop your secure PDF eBook viewer for iOS and Android. I have experience building Flutter applications, secure backend systems, authentication, API integration, and document management solutions with a focus on performance and security. I recommend Flutter with a secure backend using authenticated signed URLs, in-app PDF rendering, per-user watermarking, restricted viewer functionality, FLAG_SECURE on Android, and screenshot/screen-recording detection on iOS. I understand the platform limitations and will implement the strongest protection mechanisms available while documenting the security model clearly. Portfolio: https://www.freelancer.com/u/abeerahmed12 I can provide a fixed-price quote with a detailed breakdown for the mobile app, backend, and any optional DRM integration after reviewing your preferred workflow and deployment requirements. Ready to start immediately. Looking forward to working with you.

@sara0346

-------Clean Code, Safe Changes, Reliable Results!------- Sara here from Serbia who can complete your project PERFECTLY. I understand you need a secure ebook viewer app for iOS and Android where users can read protected PDFs inside the app with authentication, access control, watermarking, and content protection features. The goal is to reduce content leakage while keeping the reading experience smooth. I've handled similar mobile app development projects involving Flutter, Android, iOS, backend services, API integration, secure user flows, and document-based applications. I would first review your security requirements and content workflow before selecting the most suitable implementation approach. My approach is to build a clear architecture, test each security layer carefully, and deliver a maintainable solution with proper documentation. Do you already have a preferred DRM solution, or should I evaluate the best option for your requirements?

@codeandcommand

Secure PDF viewing usually means blocking screenshots, disabling exports, and streaming pages instead of storing the file locally. That's the part most apps miss. I'd build this in Flutter, one codebase for iOS and Android, with watermarking if you want extra protection. Can start today, working build in 4 days. Budget and timeline here are early estimates from the brief, we'll refine after a quick scope talk. Want me to send a plan?

@diegovisiso

I hope you are doing well. I understand you need a secure cross-platform ebook application that protects premium PDF content while providing a smooth reading experience. The focus is on authenticated content delivery, in-app viewing, user-specific access control, and practical anti-leak measures, with a clear understanding of each platform's security capabilities and limitations. I will develop the solution using Flutter with a secure backend for authenticated PDF delivery, implementing in-app rendering, per-user watermarks, signed URLs, screenshot protection on Android, screenshot/screen recording detection on iOS, and role-based access management. The application will be structured for maintainability, scalability, and straightforward deployment, with complete documentation and optional DRM integration if it provides the best balance of security and cost. You can expect clean, production-ready code, comprehensive documentation, reliable security practices, and a smooth handover. Best regards, Diego Vinicius

@shayankhan333

The biggest risk with secure PDF viewers isn't the rendering, it's the caching layer. Even with signed URLs, most PDF libraries write temp files to disk that persist after the session ends. That's the first thing I'll audit and lock down. I'll build this in Flutter with Syncfusion's PDF Viewer for in-app rendering, a Node.js backend serving time-limited signed URLs with per-user access control, and FLAG_SECURE on Android plus screenshot/recording detection on iOS with content blur on capture. Watermarking gets baked into the render pipeline so each page carries the user's identity. I've worked with iOS screenshot notification APIs before and I'll document exactly what's preventable versus what's detection-only, no overselling. For $30 this scope is significantly underbudgeted. Best regards, Shayan