FAQ

Celyn requires macOS 15.0 (Sequoia) or later. It works on both Apple Silicon and Intel Macs.

Yes, entirely. All speech recognition and translation happens on-device using Apple's built-in frameworks. No internet connection is required after the initial language model download.

Arabic, Mandarin Chinese, Dutch, English, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese (Brazilian), Russian, Spanish, Thai, Turkish, Ukrainian, and Vietnamese.

No. Celyn processes audio in real time and discards it immediately. Nothing is recorded, stored, or transmitted anywhere. Your audio never leaves your Mac.

Mic captures your microphone — useful for in-person conversations. System audio captures everything playing through your Mac — useful for Zoom calls, YouTube videos, podcasts, and any other app. Both mode uses system audio when available, with mic as fallback.

Celyn uses Apple's on-device translation models, which are shared across macOS. If you've used the Translate app before, they may already be downloaded. If not, Celyn downloads them once in the background — you'll only see this the first time.

After purchase you'll receive a license key by email. Open Celyn, click the language label in the notch to open Settings, and paste your key in the License section.

After 7 days, Celyn will prompt you to purchase a license. Your settings and preferences are preserved — nothing is lost.

Yes, each license works on up to 2 Macs simultaneously.

Yes. Celyn is a one-time purchase and all future updates are included. You only pay once.

Yes, you can request a full refund within 30 days of purchase. No reason required. Contact hello@celyn.app.

Check your email for the Polar receipt — it contains your license key. If you can't find it, contact hello@celyn.app with your purchase email and we'll resend it.

Please report any issues by emailing hello@celyn.app or opening a bug report on GitHub. Your feedback helps make Celyn better for everyone.

No data or personal information is collected by Celyn. See our privacy policy for full details.