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Celyn AI

Paid

Discover Celyn AI, its features, pricing, and use cases. Learn how this Mac app captures audio privately with on-device AI processing.

Audio EditingPaid
Inputs: audioOutputs: text
Type
Saas
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About Celyn AI

Celyn is a Mac application that provides real-time translation by displaying subtitles directly in the macOS notch. It captures audio from the microphone, system output, or both, and processes everything locally using Apple's built-in speech recognition and translation frameworks. This ensures that no audio data leaves the device, offering a private and offline-compatible solution for understanding foreign languages in meetings, videos, podcasts, or face-to-face conversations. Users activate translation with a single hotkey and see translated text appear seamlessly where their eyes already focus. The app supports 19 languages and works entirely offline after the initial language model download. Celyn is available as a one-time purchase with a 7-day free trial, requiring macOS 15 Sequoia or later. No accounts, subscriptions, or internet connection are needed for daily use.

Key Features

Real-time translation from audio to on-screen subtitles in the macOS notch
On-device processing using Apple's speech and translation frameworks — no cloud dependence
Completely offline functionality after initial language model download
Capture from microphone, system audio (e.g., Zoom, YouTube), or both simultaneously
Single hotkey (⌥T) to start and stop translation
19 supported languages including English, Spanish, French, German, Japanese, Korean, Mandarin, and more
One-time purchase model with a 7-day free trial — no subscriptions
Privacy-focused design: no audio recording, storage, or transmission

Pros & Cons

Pros
  • All processing happens on-device, ensuring complete privacy — no audio is recorded or sent externally
  • Works entirely offline after initial download, eliminating the need for an internet connection
  • Simple, unobtrusive interface that lives in the notch — no clutter or extra windows
  • One-time purchase with a 7-day free trial, avoiding recurring subscription costs
Cons
  • Requires macOS 15 (Sequoia) or later, limiting compatibility to newer Mac hardware
  • Only available on Mac — no support for Windows, Linux, or mobile devices
  • Translation quality depends on Apple's built-in speech and translation frameworks, which may have lower accuracy for some language pairs or accented speech
  • Limited to text subtitles in the notch — no audio-to-audio translation or additional export options
  • Free trial is limited to 7 days; after that a one-time purchase of $14 is required

Best For

Translate live conversations during in-person meetings with foreign language speakersGet subtitles for international video calls on platforms like Zoom or Google MeetUnderstand foreign language content in YouTube videos, podcasts, or streaming servicesFollow along with system audio from any Mac application that outputs soundLearn languages by reading translations in real time while listening to native speechAccess private, offline translation for sensitive discussions where cloud services are not permitted

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FAQ

What Mac models are compatible with Celyn?
Based on available information, Celyn requires macOS 15 Sequoia or later and works on both Apple Silicon and Intel Macs. Compatibility with specific models should be verified on the official website.
Does Celyn need an internet connection to work?
Celyn works entirely offline after the initial language model download. All speech recognition and translation happen on-device, so no internet connection is required for daily use.
Which languages are supported?
The website lists 19 languages: Arabic, Mandarin Chinese, Dutch, English, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese (Brazilian), Russian, Spanish, Thai, Turkish, Ukrainian, and Vietnamese. This list should be confirmed as it may change.
Does Celyn record or store my audio?
No. According to the product's privacy policy, Celyn processes audio in real time and discards it immediately. Nothing is recorded, stored, or transmitted anywhere. Audio never leaves the Mac.
What is the pricing model?
Celyn is a one-time purchase at $14, with a 7-day free trial. No subscriptions or hidden fees are mentioned on the website, but this should be verified on the purchase page.
Can I translate system audio from other apps like Zoom or YouTube?
Yes, Celyn can capture both microphone and system audio simultaneously, allowing translation of audio from other applications such as video calls, streaming services, or podcasts.