# MurmurAI > MurmurAI is a powerful, privacy-focused transcription app for macOS that runs 100% on-device. ## About MurmurAI is a macOS application for speech-to-text transcription. All audio processing happens locally on the user's Mac - no audio is ever sent to external servers. The app supports multiple AI transcription engines and features like speaker identification and AI-powered transcript refinement. ## Key Features - **100% On-Device Processing**: All transcription happens locally. Audio never leaves your Mac. - **Multiple AI Engines**: WhisperKit (Apple Silicon optimized), Parakeet (NVIDIA), and Apple Speech - **Speaker Identification**: Automatically identify different speakers in recordings - **Diarization Refinement**: Fine-tune speaker segments, merge or split sections, and assign names - **Chat with Transcripts**: Ask questions and get insights from your saved transcripts using AI (supports Ollama and OpenAI) - **AI Transcript Refinement**: Clean up transcripts using AI (OpenAI API or local Ollama) - **Custom Prompts**: Create unlimited custom prompts for AI refinement, assign them to specific apps, and keep one as the Default - **Spoken Work**: Review recent dictations, the app you spoke into, and whether text was inserted - **Global Hotkey Dictation**: Press a hotkey anywhere, speak, and insert transcribed text. Optional hold to talk. See https://murmurai.app/dictation - **On-Device Speech to Text**: Transcribe audio/video files (MP3, WAV, M4A, MP4, MOV) locally with WhisperKit, Parakeet, or Apple Speech. See https://murmurai.app/transcription - **Multiple Export Formats**: SRT subtitles, VTT captions, plain text ## Pricing - **Free**: WhisperKit (Tiny/Base models), Apple Speech, speaker ID, AI refinement, hotkey dictation, file transcription up to 5 minutes - **Pro ($24.99 one-time)**: All engines, all models, unlimited file transcription, unlimited custom prompts, unlimited saved transcripts ## Platform - macOS 14 (Sonoma) or later - Optimized for Apple Silicon (M1/M2/M3/M4) - Available via direct download (Gumroad) and Mac App Store ## Privacy MurmurAI is designed with privacy as a core principle: - Audio is processed 100% on-device - Transcripts are stored locally only - No personal data collection - Optional AI refinement uses your own API key ## Links - Website: https://murmurai.app - Download (Direct): https://simplerapps.gumroad.com/l/murmur - Download (App Store): https://apps.apple.com/app/id6757353147 - Dictation: https://murmurai.app/dictation - Transcription: https://murmurai.app/transcription - Changelog: https://murmurai.app/changelog - Privacy Policy: https://murmurai.app/privacy - Terms of Service: https://murmurai.app/terms - Contact: samarthagarwal@live.com ## Developer Created by Samarth Agarwal