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I need a small proof-of-concept app that runs on both Android and iOS and is written in Kotlin (KMM is preferred, but separate Kotlin/Swift modules are acceptable if that simplifies the Apple side). Its only job is to watch the microphone, recognise the exact moment the mic becomes active, begin recording automatically, stop when the mic goes idle, save the captured audio to local storage, and instantly send that file to a predefined email address—no user action required once permissions have been granted. I am interested solely in the “is the microphone currently being used?” check, followed by seamless background recording and email dispatch. No on-screen alerts, logs, or analytics are needed beyond what helps you debug during development. The UI can be minimal: a single screen to request permissions and allow me to enter or change the target email address. Because of Apple’s and Google’s background-execution limits, please factor in the correct entitlements, foreground service (Android), and background mode (iOS) so the workflow remains reliable even when the app is not visible. The finished project must compile cleanly in Android Studio and Xcode, respect the latest platform privacy guidelines, and pass store-level microphone permission checks. Deliverables • Full, well-commented source code • Simple build/run instructions for each platform • An APK and an iOS archive I can sideload for quick testing Acceptance is based on me installing both builds, speaking near the device, and receiving an email with the corresponding audio file each time the mic activates.
ID do Projeto: 40316231
53 propostas
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Ativo há 24 dias
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53 freelancers estão ofertando em média $213 USD for esse trabalho

Hello, i can develop mobile applications based on Voice Activity Detection (VAD). i have couple of questions about the project. i am a mobile applications developer and i have more than 8 years of experience developing mobile applications with backend services. i have completed more than 520 projects either local or internet based. i am confident i will provide you quality software services on time. Let's chat to proceed.
$1.400 USD em 15 dias
8,8
8,8

Hello, HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT I have 15+ years of proven experience in similar technology and confidently understand your requirement to build a scalable, user-centric cross-platform mic activity detection app with automated recording and email dispatch. -->> Mic activity detection -->> Background recording -->> Auto email sending -->> Local storage handling -->> Minimal permission UI I follow a clean architecture approach with secure APIs, efficient integrations, and agile workflow for reliable delivery. in chat as I have some queries to ask regarding the project to proceed further. I would approach your project by starting with wireframes and getting the UI/UX design completed, before starting the actual development phase. I am confident to successfully implement this project from start-to-finish. Let's come together and create a platform that is efficient, compliant, and reliable across both Android and iOS. Thanks & regards Julian
$450 USD em 7 dias
8,4
8,4

Hi there, I have read your project requirement. You need a cross-platform proof-of-concept app (KMM preferred) that detects microphone activation, automatically records audio, stops when idle, saves locally, and sends it via email, working reliably even in background conditions and compliant with iOS and Android policies. We can build a clean, minimal POC using Kotlin Multiplatform Mobile where possible, with platform-specific handling for audio session detection and background execution. The solution will focus on accurate mic-state detection, seamless recording lifecycle, and automated email dispatch while respecting platform privacy and permission requirements. Questions: ========= Should the app detect only system-level mic usage or just activity within the app itself? Do you have a preferred email method (SMTP, API like SendGrid) for sending audio files? What audio format do you prefer (WAV, MP3, AAC) for storage and email? Do you need a retry mechanism if email sending fails in the background? Best Regards, Srashtasoft Team
$190 USD em 7 dias
6,8
6,8

Hello, I am really excited about the opportunity to collaborate with you on this project! It aligns perfectly with my skill set and experience, and I’m confident I can contribute meaningfully to your vision. I genuinely enjoy working on projects like this, and I believe we can create something both functional and visually engaging. Please feel free to check out my profile to learn more about my past work and client feedback. I’d love to connect and discuss the project details further your goals, expectations, and any specific features or ideas you have in mind. The more I understand your vision, the better I can bring it to life. I am ready to get started right away and will put my full energy and focus into delivering quality results on time. My goal is not just to complete the project, but to exceed your expectations and build a long-term working relationship. Looking forward to hearing from you soon! With Regards! Nikhil
$250 USD em 7 dias
6,1
6,1

Hello There!!! ★★★★ (Build mic-triggered recording app with auto email delivery) ★★★★ I understand you need a cross-platform app that detects mic activity, auto records audio, saves locally, and instantly sends via email, working reliably in background with minimal UI and proper permissions. ⚜ Mic activity detection logic ⚜ Auto start/stop audio recording ⚜ Local file storage handling ⚜ Email integration (auto send) ⚜ Background execution setup ⚜ Minimal UI for permissions/email ⚜ Clean build for Android & iOS I have 5+ yrs experiance in mobile dev, worked with Kotlin, Swift and background services. I enjoy solving system-level challenges like this. I will use KMM where possible, handle Android foreground service & iOS background modes carefully to meet store rules. Happy to share similar work and start quickly. Let’s discuss. Warm Regards, Farhin B.
$110 USD em 10 dias
6,6
6,6

With over a decade long experience in mobile app development, particularly in iOS using Swift, I believe I have the skills and capability to successfully develop the Cross-Platform Mic Activity Emailer app you need. I am also proficient in Android development with Kotlin - which can come in handy since cross-platform compatibility is important to you. Understanding your preference for Kotlin Multiplatform Mobile (KMM) or separate Kotlin/Swift modules, I'm well-versed in both frameworks. I assure you clean code with detailed comments for easy understanding and future scaling. The app will be developed adhering to platform privacy guidelines and will pass store-level microphone permission checks as expected. In terms of testing, my QA team follows thorough methodology to ensure complete testing of functions before delivering the final product. On completion, as outlined in your project description, you will not only receive a well-commented source code, but also simple build/run instructions for each platform and ready-to-use APK and iOS archive files for quick testing. My goal is to ensure you receive a seamless and precise solution that meets your requirements consistently every time.
$175 USD em 5 dias
5,1
5,1

⭐⭐⭐⭐⭐ Create a Microphone Monitoring App for Android and iOS ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for a proof-of-concept app that monitors the microphone. You don't need to look any further; Zohaib is here to help you! My team has completed 50+ similar projects focused on audio recording apps. I will create a seamless experience for monitoring the mic and sending audio files to your email automatically. ➡️ Why Me? I can easily build your app as I have 5 years of experience in mobile app development, focusing on Kotlin, Swift, and cross-platform solutions. My expertise includes audio processing, background services, and email integration. Additionally, I have a strong grip on privacy guidelines and app permissions for both Android and iOS. ➡️ Let's have a quick chat to discuss your project in detail and let me show you examples of my previous work. I'm looking forward to discussing this with you! ➡️ Skills & Experience: ✅ Kotlin Development ✅ Swift Development ✅ KMM (Kotlin Multiplatform Mobile) ✅ Background Services ✅ Audio Recording ✅ Email Integration ✅ App Permissions ✅ Debugging ✅ UI Design ✅ Cross-Platform Solutions ✅ Clean Code Practices ✅ Privacy Compliance Waiting for your response! Best Regards, Zohaib
$150 USD em 2 dias
5,1
5,1

Hi there, I read your project details regarding the Cross-Platform Mic Activity Emailer and I can build this proof-of-concept app for you using Kotlin Multiplatform Mobile (KMM) to ensure seamless execution on both Android and iOS. I will utilize Kotlin for shared logic, integrating with platform-specific modules for Android (using Android Studio) and iOS (using Xcode and Swift). My approach includes implementing a foreground service on Android and background mode on iOS to handle microphone activity checks and audio recording, even when the app is not visible. But Moder Monitoring Restriction: Modern mobile OSs do not allow third-party apps to detect when other apps are using the microphone. Proposed Solution: The app will maintain its own background session (Foreground Service on Android, Background Mode on iOS) and use Voice Activity Detection (VAD) to trigger recording when it "hears" sound. Does this meet your requirements, or were you specifically looking for system-level "mic active" indicators? Email Dispatch: We will use the SendGrid API (or similar) for background email dispatch. This requires an API key. For the POC, we can hardcode a placeholder or provide a field to enter it. Let's discuss the features you need in the MVP. Best Regards, Mohammad Mahmudul Islam IQLabs
$400 USD em 5 dias
4,9
4,9

Hey, I get what you’re aiming for, but I need to be clear—an app that secretly monitors mic activity, records in the background, and sends audio without user awareness will not pass App Store or Play Store policies, and on iOS especially it’s technically restricted. There’s no reliable way to detect “mic used by other apps” or run silent background recording like that without it being flagged or rejected. What is doable is a compliant version: the app runs a foreground service (Android) or active session (iOS), clearly indicates recording, and captures audio based on sound level (voice activity detection) instead of “mic activation by system.” Then it can auto-save and send the file (email or API) while the app is active or in an approved background mode. I can build this with KMM (shared logic for audio detection + upload) and native wrappers for each platform, keeping it lightweight and easy to run. It’ll compile cleanly and actually be stable across both OSes. If you’re open to that adjusted approach (user-aware recording + VAD trigger), I can get a solid PoC done quickly
$100 USD em 7 dias
4,1
4,1

Hi Mate , Good morning! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in iPhone, Kotlin, App Development, Debugging, iOS Development, Mobile App Development, Objective C and Swift. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Feel free to contact us to discuss your project
$155 USD em 6 dias
3,9
3,9

Hello, I have experience building cross-platform mobile apps using Kotlin Multiplatform and native integrations, and I can develop a clean proof-of-concept that captures audio, stores it locally, and sends it via email. The app will include a minimal interface for permissions and email configuration, while ensuring proper handling of microphone access on both Android and iOS. From a technical side, I will use KMM for shared logic and native APIs like MediaRecorder on Android and AVAudioRecorder on iOS for reliable audio capture. Background execution will be handled using Android foreground services and appropriate iOS background modes, keeping in mind platform limitations. Email delivery will be implemented through a secure API or SMTP-based service to ensure fast and consistent file transfer. You will receive well-structured, commented source code, along with clear build and run instructions for both Android Studio and Xcode. I will also provide test builds so you can quickly verify functionality, ensuring the app works smoothly within platform guidelines and performs reliably during real-world testing.
$140 USD em 7 dias
4,5
4,5

Hello there, I read your Cross-Platform Mic Activity Emailer concept and I'm confident I can deliver a Proof-of-Concept as a solo developer. I specialize in Kotlin Multiplatform Mobile, with solid experience in Android foreground/background services and iOS background modes, plus careful handling of microphone permissions and privacy guidelines. I will implement a silent, event-driven workflow: monitor mic activity, start recording automatically, stop on idle, save audio locally, and immediately dispatch via email to a predefined address. The UI will be minimal: a single screen to grant permissions and set the target email. The solution will compile in Android Studio and Xcode, with clear build/run instructions and test artifacts for APK and iOS archive. I will ensure appropriate entitlements and reliable background operation across both platforms, focusing on correctness and debuggability. Please feel free to contact me to discuss details. I look forward to the possibility of working together. Best regards, Billy Bryan
$250 USD em 2 dias
3,3
3,3

Hi, I can build a cross-platform proof-of-concept using Kotlin Multiplatform (KMM) that handles microphone-triggered recording and automatic email delivery, while staying compliant with iOS and Android privacy policies. Approach: • Use explicit user consent + foreground/active session for audio monitoring • Implement voice activity detection (VAD) to auto-start/stop recording • Save audio locally and trigger automatic email sending • Android: Foreground service for reliability • iOS: Background audio mode with proper entitlements Features: • Minimal UI (permissions + email config) • Auto recording on voice detection • Auto stop on silence • Instant email with audio attachment • Clean, well-structured shared KMM logic Deliverables: • Full source code (well-commented) • Android APK + iOS build • Setup & run instructions Timeline: 5–7 days I’ll ensure the app works reliably while meeting platform guidelines and avoiding rejection issues. Happy to discuss exact behavior and edge cases before starting. Best regards, Jagrati.
$111,11 USD em 17 dias
3,6
3,6

Hello, The core challenge lies in managing the microphone's background state effectively across both Android and iOS platforms. Ensuring reliable detection of microphone activity while adhering to strict background execution limits presents significant complexity. Additionally, maintaining data integrity during audio capture and ensuring seamless email dispatch without user intervention raises further technical hurdles. Could you clarify the expected frequency of microphone activation and the maximum duration of recordings? Understanding the flow of audio data and how it integrates with email dispatch is crucial. Are there specific security requirements for handling the audio files, especially regarding user privacy and permission handling? I look forward to discussing the architecture in more detail.
$30 USD em 7 dias
3,1
3,1

Can you tell me a bit more about the intended use case? The main technical detail to clarify is that iOS does not expose a system API that tells an app when another app activates the microphone. I can build exactly what you've described technically the microphone state detection, background recording pipeline, automatic email dispatch, and cross-platform Kotlin/Swift architecture are all within scope. Once a clip is finalized, the app can send it through a secure SMTP or API mail service.I'm online at the moment if you would like to get on a chat and discuss this further. Wishing you the best of health and success. Best Wishes Ruchi
$340 USD em 4 dias
2,6
2,6

Hi, As per my understanding: You need a cross-platform (Android & iOS) proof-of-concept app in Kotlin (preferably KMM) that detects when the microphone becomes active, automatically records audio in the background, stops on inactivity, saves locally, and instantly emails the file—while complying with strict platform privacy and background execution rules. Implementation approach: I will evaluate feasibility against Apple/Google privacy policies (mic usage detection without user trigger is restricted). Then build a compliant solution using KMM for shared logic and native modules where required. On Android, I’ll use a foreground service with AudioRecord APIs; on iOS, AVAudioSession with proper background modes. Instead of passive mic detection (limited by OS), I’ll implement controlled recording triggers aligned with permissions. Audio will be saved locally and sent via secure SMTP/API. The app will include a minimal UI for permissions and email input, with clean, documented code and build-ready configs. A few quick questions: 1. Are you open to OS-compliant alternatives to mic activity detection? 2. Preferred email method: SMTP or third-party API? 3. Target OS versions for Android/iOS? 4. Should recordings run continuously or only under defined triggers?
$98 USD em 5 dias
3,0
3,0

HI, I’VE REVIEWED YOUR PROJECT REQUIREMENTS FOR MICROPHONE MONITORING POC APP AND HAVE COMPLETED SIMILAR PROJECTS BEFORE. I CAN DELIVER A HIGH-QUALITY SOLUTION AND AM READY TO START IMMEDIATELY. I understand you need a cross-platform (Kotlin/KMM) proof-of-concept app that detects microphone activation, automatically records audio in the background, saves it locally, and instantly sends it via email without user interaction. The solution must handle background execution limits and comply with platform privacy policies. I have 6+ years of experience developing mobile apps with background services, audio processing, and cross-platform architectures, ensuring stable performance, proper permission handling, and compliance with Android and iOS guidelines. I specialize in building low-level, system-aware mobile applications with background processing and real-time data handling. Let’s start a chat and finalize the technical approach to deliver a reliable and compliant proof-of-concept application. FEEL FREE TO MESSAGE ME ANYTIME. I’M USUALLY AVAILABLE AND RESPOND WITHIN 5 MINUTES. Best regards, Nikita Gupta
$140 USD em 18 dias
2,6
2,6

Hi, I can do this. I have extensive experience in mobile app development, particularly with Kotlin and Swift, making me well-suited for your proof-of-concept app. I will implement a solution that monitors microphone activity, automatically records audio, and sends it to a predefined email address without user interaction. I will ensure compliance with both Android and iOS background execution limits, including the necessary entitlements and services. The app will feature a minimal UI for permission requests and email input, while the core functionality will operate seamlessly in the background. Deliverables will include well-commented source code, build/run instructions for both platforms, and APK/iOS archive files for testing. I am committed to meeting your requirements and ensuring the app passes all necessary permission checks. Looking forward to collaborating on this project. Ashnasajid
$140 USD em 3 dias
2,4
2,4

Hello, With extensive experience in cross-platform mobile app development, I will craft a proof-of-concept that reliably detects microphone activation, seamlessly records audio in the background, and emails it to your specified address. What is your preferred approach for handling background microphone permissions across both Android and iOS? Thanks, Juan Aponte
$155 USD em 5 dias
3,9
3,9

Hello The real challenge here is ensuring seamless microphone monitoring and background recording across both Android and iOS platforms while adhering to strict platform guidelines for background execution, privacy, and permissions. I’ll implement this proof-of-concept using Kotlin Multiplatform Mobile (KMM) for shared code, handling microphone state detection, automatic recording, and background execution using the proper entitlements and services for both platforms. On Android, I’ll leverage a foreground service to handle microphone input, and for iOS, I’ll ensure the app works within Apple’s background modes for audio capture. Both platforms will automatically send the audio file via email once recording stops. You’ll receive well-commented source code, build/run instructions for both Android and iOS, and an APK and iOS archive for testing. I’ve developed cross-platform apps with strict background service requirements and seamless integration of native features. I can start immediately.
$140 USD em 7 dias
2,2
2,2

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