CaptionUI
Word-by-word karaoke captions, made on your iPhone.
CaptionUI turns the speech in your video into synced captions that light up word by word. Fix the text, pick a style, and export the video with the captions burned in — or just the caption files (SRT, VTT, ASS).
Everything happens on the device: transcription, editing, rendering and export. Your video is never sent to a server, there is no account, and we collect no data.
Support
Questions, problems or suggestions: contato@kifactory.app. We answer in English and Portuguese.
- Transcription won't start. It runs on the iPhone and needs the speech model for the video's language. When that model isn't installed, the app says so and explains how to download it before transcribing.
- Reporting a problem. In CaptionUI's Settings › Diagnostics, the app can share a technical log. It holds nothing you said or typed — only counts and error codes — and it leaves the device only if you send it yourself.
- Subscriptions. To cancel or change plans, go to iPhone Settings › your name › Subscriptions. To get a purchase back on a new device, tap Restore purchases in CaptionUI's Settings.