Realtime Subtitle

Realtime Subtitle is a live-captioning tool for macOS. It captions any sound playing on your Mac in real time — online meetings, foreign-language videos, live streams, podcasts — or conversations picked up by your microphone.

KEY FEATURES • Two audio sources: capture audio from a specific app (macOS 15 Audio Process Tap), or switch to your microphone • Two recognition engines: WhisperKit on-device models (fully offline, data never leaves your Mac) or Apple Speech (no model download, more languages) • Live translation: translate as you listen with a local Ollama model or Apple System Translation • Smart segmentation: VAD voice-activity detection plus a SaT semantic sentence-segmentation model for natural, readable captions • Floating caption window: an always-on-top translucent caption bar you can drag anywhere • Menu bar app: lightweight, one click to start or stop

PRIVACY FIRST No data is collected, uploaded, or shared. With on-device engines, recognition and translation never leave your Mac.

PERFECT FOR Cross-border meetings, foreign-language videos and courses, live streams and podcasts without captions, noisy environments, and hearing assistance.

PRO Monthly or yearly subscription (both include a 3-day free trial, cancel anytime), or a one-time lifetime purchase. Pro unlocks all features.

Requires macOS 15 or later.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://github.com/ultravires/realtime-subtitle-privacy/blob/main/PRIVACY.md

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