About Jimakuru
Jimakuru adds captions to your videos. Pick a video and it transcribes the speech right on your device and splits it into easy-to-read captions. Edit any caption in place and choose from 24 styles — classic, cute, bold and simple — and more than 70 fonts. Change colors, outlines, shadows and backgrounds freely, drag captions with your finger, and push them to the edge of the screen for vertical text. You can also translate captions (bilingual captions), add sound captions such as [Applause] and [Laughter], keep captions off faces automatically and cut silent pauses. Export the video with captions burned in, or as an SRT file or a text transcript. Audio and video are processed entirely on your device and never sent anywhere.
At a glance
| What it is | An app for iPhone and iPad that adds captions (subtitles) to your videos. It transcribes the speech on the device and splits it into readable captions that you can edit and style |
|---|---|
| Price | Free. Every feature is available, with no limit on the number or length of videos and no watermark. There are no in-app purchases and no subscription, and no account is needed |
| Ads | A small banner at the bottom of the screen, a box shown while a video is loading or exporting, and a full-screen ad at most once a day after an export finishes. Ads are non-personalized |
| Privacy | Speech recognition, translation and export all run on the device. Videos, audio and caption text are never uploaded |
| Caption styles | 24 styles and more than 70 fonts. Colors, outlines, shadows, backgrounds, word-by-word highlighting, vertical text, and drag-to-position |
| Translation | Captions can be translated on the device and shown alone or as bilingual captions (translation under the original) |
| Export | Video with captions burned in (HEVC or H.264), an SRT caption file, or a plain-text transcript |
| Languages | The app interface is available in 19 languages. Speech is recognized with Apple's on-device speech recognition; the data for each language is downloaded once, after the app shows its size and you confirm |
| Requirements | iPhone or iPad with iOS 26.0 or later |
| Get it | App Store (https://apps.apple.com/app/id6816638377) |
Features
- Transcribed on your device — Speech is turned into text on your iPhone. Nothing is uploaded, so there are no limits on how many videos or how long they are
- Readable captions you can fix in place — Captions are split at pauses and sentence ends. Tap to edit, split, merge, adjust timing or replace words in bulk
- 24 styles and 70+ fonts — Classic, cute, bold and simple styles. Mix fonts, colors, gradients, double outlines, shadows and rounded boxes, and save your look as the default for new videos. Captions can highlight word by word as they are spoken. Drag captions on the video, push them to the edge for vertical text, or change the position and look of a single caption.
- Bilingual captions — Translate captions on your device and show only the translation, or the translation in small text under the original
- Sound captions and face-aware placement — Applause, laughter and music become captions like [Applause]. Where a caption would cover a face, it moves out of the way automatically
- Trim, tighten and reshape — Keep as many parts of the video as you like, and cut silent gaps and filler words such as "um" and "uh". Turn a landscape video into 9:16, 1:1, 4:5 or 16:9, with the empty space filled by a blurred copy of the video or black
- Export — Video with captions burned in (HEVC / H.264), SRT caption file or text transcript. No watermark
Pricing
- Free — Free (All features are available. No watermark and no limits. No in-app purchases or subscriptions. A small non-personalized banner ad is shown at the bottom of the screen to cover running costs)
Requirements
- iOS 26.0 or later
- iPhone and iPad
Contact
For questions, requests or bug reports, please get in touch.
Contact supportI usually reply within 2–3 business days.
Frequently asked questions
What does Jimakuru do?
Jimakuru adds captions to a video automatically. Pick a video, and the app transcribes what is said on your iPhone or iPad, splits it into captions at pauses and sentence ends, and lets you correct the text, adjust the timing and choose a style. You can then export the video with the captions burned in, or export an SRT file or a text transcript.
Is it really free? Is there a watermark or a time limit?
It is free. Every feature is available, there is no watermark on exported videos, and there is no limit on how many videos you caption or how long they are. There are no in-app purchases and no subscription. Running costs are covered by ads.
Are my videos uploaded to a server?
No. Speech is transcribed with Apple's on-device speech recognition, and translation and export also run on the device. Your videos, audio and caption text are never sent to the developer. Only the recognition or translation data for a language is downloaded from Apple, once, the first time you use that language.
Can it translate captions or make bilingual captions?
Yes. Captions can be translated on the device. You can show only the translation, or show the translation in smaller text under the original line as bilingual captions.
Can I export an SRT file?
Yes. Besides a video with captions burned in (HEVC or H.264), you can export an SRT caption file or a plain-text transcript.
Can I make captions for short vertical videos?
Yes. A landscape video can be reshaped to 9:16, 1:1, 4:5 or 16:9, with the empty space filled by a blurred copy of the video or black. Captions can highlight word by word as they are spoken, and silent gaps and filler words can be cut.
How often do ads appear?
A small banner is shown at the bottom of the screen and a box is shown while a video is loading or exporting. A full-screen ad appears at most once a day, after an export has finished. Ads are non-personalized and the app does not ask for tracking permission.
Which devices are supported?
iPhone and iPad with iOS 26.0 or later.