Subfast is a native macOS 26 app that turns any screen recording into a captioned, zoom-polished video. It transcribes captions on-device using Apple Intelligence, lets you draw zoom effects on any part of the frame, and exports to MP4, GIF or SRT.

Yes. Subfast runs transcription entirely on-device using Apple Intelligence and the Foundation Models introduced in macOS 26. Your recordings never leave your Mac, captions are generated offline, and AI cleans up punctuation and speaker phrasing for higher accuracy.

Subfast requires macOS 26 (Tahoe) or later on an Apple Silicon Mac, which is needed for on-device Apple Intelligence transcription. It installs as a direct .dmg download — no App Store required.

Subfast transcribes speech on-device with high accuracy across many languages, and every caption (cue) is fully editable so you can fix names or jargon in seconds.

Both. Export a standalone SRT sidecar file, or burn captions directly into an MP4 or GIF for social platforms that do not support subtitle tracks.

Monthly and yearly plans are subscriptions billed through Polar. The Lifetime license is a one-time purchase for a single Mac seat with free updates. Teams can request volume seat pricing.

Yes. Download the .dmg and your 7-day free trial begins automatically — no account or credit card required. All features are unlocked during the trial.

Subfast exports to MP4 (H.264, share-ready), animated GIF (loop-friendly for social), and SRT (subtitle sidecar for any player or editor). All three are generated from the same session with one click.

Completely. Transcription runs on-device using Apple Intelligence — your recordings and captions are never uploaded to any server. Everything stays on your Mac.