Facts
CaptionAddr at a glance
Updated
CaptionAddr is an iPhone and iPad app that transcribes English speech on the device and burns editable, word-by-word captions into a new copy of your video. It is free for videos up to 2 minutes; the optional CaptionAddr Pro subscription extends the limit to 30 minutes per video.
Product
- Name
CaptionAddr
- What it does
Automatically transcribes the English speech in a video, shows it as single-word captions timed to the speech, lets you edit and style them, and exports a new movie with the captions burned in.
- Category
Photo & Video app for captioning and subtitling video.
- Website
Platforms and requirements
- Platforms
iPhone and iPad.
- Operating system
iOS 17.0 or later; iPadOS 17.0 or later.
- Hardware
A12-class Apple silicon or newer, for example iPhone XS, iPhone XR, iPhone SE (2nd generation) or later; iPad (8th generation), iPad mini (5th generation), iPad Air (3rd generation) or later. Check the App Store listing for your device.
- Account
No account is needed.
Plans and pricing
- Free
Videos up to 2 minutes. Includes transcription, word editing, all 20 caption fonts and styles, and export. No required watermark.
- CaptionAddr Pro
Videos up to 30 minutes. Auto-renewing subscription through Apple, billed monthly or annually. Eligible new subscribers get a free trial: 7 days on the annual plan, 3 days on the monthly plan. The App Store shows the current price in your currency, and any eligible introductory offer, before purchase. Cancel any time in your Apple subscription settings.
Features
- On-device English transcription with NVIDIA’s Parakeet TDT 0.6B v2 speech model, bundled in the app
- Automatic single-word captions with a subtle pop-in, timed to the speech and aligned to the video frame rate
- Edit, delete and reorder caption words, with undo and redo
- On devices with Apple Intelligence turned on, uncertain sound-alike words are checked by Apple’s on-device language model
- Cancel an export in progress and keep your edits
- 20 caption fonts, adjustable size and an optional tinted background
- Captions are white uppercase text with a dark outline; there are no color, weight, outline or letter-case controls
- Drag captions into position on the preview
- Optional small CaptionAddr watermark, off unless you choose it
Input and export
- Input
One video at a time, chosen with Apple’s Photos picker. The original stays in your library.
- Export
A new, re-encoded movie with captions burned into the picture, saved to Photos and shareable to any app.
- Export format
A QuickTime movie (.mov) that keeps the video’s shape, at up to 4K and up to 60 frames per second. Video is H.264, or HEVC for 4K above 30 frames per second. Videos smaller than 1080p are scaled up to 1080p. HDR video, including Dolby Vision, is converted to standard dynamic range.
- Not supported
SRT, VTT or text transcript export; manual per-word timing; full-sentence caption layouts; batch processing.
Languages
Transcription supports English speech only. CaptionAddr does not translate or caption other languages. The app and website are in English.
Privacy
Transcription runs on the device. CaptionAddr doesn’t send your video, audio or captions to its servers for transcription. The app uses online services for purchases, diagnostics, security and aggregate workflow counts, and internet may be needed for iCloud downloads, purchases and Pro verification. See the privacy policy and privacy choices.
Accuracy
No speech model is perfect. Background noise, music, overlapping voices and strong accents can cause mistakes or missing words, so review captions before sharing. Burned-in captions can’t be switched off or resized by viewers and are not a guarantee of accessibility compliance.