Android Call UI with Hotwords

@aman720gupta

Hi! I can build your full-screen, voice-controlled Android call replacement app using only open-source, fully on-device speech tools. I have 11.5+ years of Android experience working with telephony, audio routing, Bluetooth SCO, and foreground services, and I’m comfortable delivering system-level features reliably. What I’ll deliver: • Material-style dialer, incoming-call, and in-call UI that replaces the stock call experience • Always-listening custom hotword detection to answer or end calls • Hotword works via built-in mic and Bluetooth headset • Easy way to swap or retrain the hotword later • Evaluation of CMU Sphinx, DeepSpeech, and Kaldi, with the best choice implemented for low latency and accuracy • Offline voice commands like “Call John” using local contact lookup • Open-source text-to-speech for confirmations (“Call answered”, “Call ended”) • Two-way call recording with clear, timestamped filenames • Proper handling of runtime permissions, Doze mode, and foreground services • Clean, well-commented Kotlin/Java code that builds cleanly with Gradle Deliverables: • Installable APK for Android 11+ • Full source code • README covering setup, permissions, model training, and hotword replacement Everything runs 100% offline with no cloud or proprietary SDKs. If awarded, I’ll focus on stability, accuracy, and a polished system-level experience.

@dushyant317

I bring 13 years of professional experience delivering high-quality results. I have strong expertise in all the required skills listed for this project. My approach ensures accuracy, clear communication, and timely delivery. I am confident I can exceed your expectations with efficient, reliable work. Looking forward to contributing to your project—ready to begin immediately.

@pransquare

As an experienced Android developer and technology expert, I am well-versed in the skills required to build your unique app. I strongly believe in leveraging open-source technologies for cleaner and more accessible solutions—exactly like what you emphasized. My thorough understanding of Java combined with your preferred Kotlin makes me a suitable choice for this task. Additionally, I have worked extensively with runtime permissions, foreground services, and battery/Doze limitations - areas crucial to this project's success. My meticulous approach to code combined with in-depth knowledge of Gradle, will ensure that the Kotlin or Java code I produce for your project is clean, well-commented, and Grandle-buildable as required. Moreover, my understanding of powerful open-source speech engines such as CMU Sphinx, Mozilla DeepSpeech, and Kaldi makes me aptly proficient to evaluate and select the one that delivers the optimal on-device latency and accuracy- as you've specified. Lastly, I have experience in frontend technologies which will allow me to deliver a UI that comfortably meets both the Material-style design principles you target and your unique hotword-detected functioning requirements. In light of these factors, I am confident that my skills are a great match for your project's needs.

@dhruvenb7

I will develop a full-screen Android call UI that replaces the default dialer and allows calls to be answered or ended using a custom voice hotword, working entirely offline. The app will use carefully selected open-source speech recognition and TTS libraries to ensure low latency, good accuracy, and reliable performance on-device, including support for Bluetooth headsets. I’ll implement proper foreground services, permissions, call recording, and battery handling, and deliver clean, well-documented Kotlin or Java code with a clear README so you can build, test, and modify the hotword or models easily in the future.

@garronwallace

I’m confident I’m the right person for this project. You want a modern, smooth, and intuitive Android app that fully replaces the call UI and uses automated, on-device hotword detection leveraging open-source engines, ensuring local data processing without cloud reliance. I bring strong Kotlin expertise and experience integrating open-source speech tools, with a focus on responsive, optimized performance. I’m new to Freelancer, but I have strong real-world experience and have completed many successful projects outside the platform. Let’s talk through your goals — I’d love to help bring this to life. Regards, Garron Levi Wallace

@Sandeshbankar24

I have carefully reviewed your requirements for a full-screen Android call experience with offline voice control, and I understand that this is a system-level Android project involving Telecom APIs, audio routing, Bluetooth SCO, and on-device speech processing — not a simple UI app.