Question 1

What is Subfast?

Accepted Answer

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.

Question 2

Does Subfast use on-device AI for transcription?

Accepted Answer

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.

Question 3

What are the system requirements?

Accepted Answer

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.

Question 4

How accurate are the auto-captions?

Accepted Answer

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.

Question 5

Can I export SRT subtitle files or burn captions into the video?

Accepted Answer

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.

Question 6

What is the difference between the license options?

Accepted Answer

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.

Question 7

Is there a free trial?

Accepted Answer

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.

Question 8

What video formats does Subfast export?

Accepted Answer

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.

Question 9

Is my screen recording data private?

Accepted Answer

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

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