Sound Off Captions

Sound Off adds stylish, animated captions to vertical video, entirely on your iPhone.

Open a clip from Photos, and Sound Off transcribes the audio on the device, picks a caption style with you, and writes the finished captioned video back to Photos - ready to post to TikTok, Reels, YouTube Shorts, or anywhere else you share to.

Twelve caption styles, including word-by-word animation and full-paragraph captions. No account, no upload, no subscription.

WHAT YOU GET

• On-device transcription. Sound Off uses Apple's on-device speech model. Your videos, audio, and transcripts stay on the iPhone.
• Twelve animated caption styles. Word-by-word styles like Pop Yellow, Karaoke, Classic, and Bounce Bold animate each word as it's spoken. New paragraph styles Reader and Editorial show the whole sentence on screen, with the spoken word highlighted, for talking-head and podcast clips.
• Word-level editing. Tap any word to fix a transcription mistake, split or merge phrases, mark where a paragraph ends, or emphasise a word.
• Native iPhone export. Save the finished captioned video to Photos in seconds, or send it straight through the share sheet.

ON-DEVICE, BY DESIGN

Sound Off has no account, no sign-in, and no analytics SDK. We don't track you, and we can't see your videos. The "Data Not Collected" label on this listing is the whole story.

ONE-TIME PURCHASE

Sound Off is free to try. Free exports carry a small watermark. A one-time unlock removes the watermark and opens the full caption style catalogue. The same purchase works on every iPhone signed into your Apple ID.

REQUIREMENTS

iPhone 12 or newer, running iOS 26 or later. Vertical, portrait video up to 90 seconds. English and Spanish audio (more languages coming).

SUPPORT

Email support@soundoffcaptions.app or visit soundoffcaptions.app/support.html