Editor & captions
Trim, crop, caption and export, on the phone
The take is not finished until it is the right length, the right shape and, for most feeds, readable with the sound off. Dual Recorder’s editor does that on the iPhone: a filmstrip trim, any crop, captions written on the device, a layout tool for two-camera takes, and an export that knows a take can be more than one file.
One tool at a time
The editor page shows one tool at a time, Crop, Layout or Captions, over a filmstrip and a playback bar that never leave the screen. Trim handles on the filmstrip set the range, playback loops inside it, and Export is the only gradient button on the page.
A take that saved several videos shows a switch per camera. Trim once, and the range applies to every file; at export, choose all of them or just the ones you want.
Crop to the feed you are posting to
The Crop tool offers the original shape, 9:16, 16:9, 1:1 and 4:3, and the crop can be moved over the picture. A take recorded in 16:9 for a channel can leave as a 9:16 cut for a story, and the source is never changed.
Captions written on the iPhone
On iPhones running iOS 26, the Captions tool transcribes the take on the device with Apple’s speech models; the first run may download a language model, and nothing is sent anywhere. The transcript is broken into short cues that end at sentence ends, so they read the way people speak. Any line can be corrected by hand, and a corrected line shows in full white so you can see what you changed.
Two ways out. Burn the words into the picture at export, which is permanent and therefore off by default, or export an SRT file through the share sheet for the platforms that take a caption file. An iPhone that cannot transcribe is simply not offered the tool; there is no disabled button to wonder about.
Rearrange a two-camera take
If the take saved its clean per-camera videos, the Layout tool rebuilds the combined video in any of the four layouts, any window shape and either camera order. It uses the same compositor the live camera used, so a rebuilt file is arranged by exactly the geometry the camera screen draws. The rebuild is a new file; the take and its files are untouched.
Export and share
Export writes MP4 or MOV, whichever Settings → Export format says, and saves to Photos with add-only permission, so the app can put videos in and never read your library. Share hands the files to the iPhone share sheet, every file of the take at once. Exporting and sharing video are the two things the PRO subscription unlocks; recording, editing and captions are free.
Exports are temporary files on their way to Photos and are deleted once they arrive, so a 4K rebuild never sits in the app’s storage.
Questions
Editor and captions, answered
Are captions free?
Yes. Transcribing, correcting the lines and preparing the SRT are free. Exporting the video with the words burned in, like every video export, is part of PRO.
Which iPhones can write captions?
iPhones running iOS 26, where Apple’s on-device speech models are available. The app checks that the phone can transcribe, not just the iOS version, and only then offers the Captions tool.
Can I edit each camera’s video separately?
The trim range and crop apply to every file of the take, which keeps them aligned. Use the source switch to check each camera, then choose at export which files to write.
Trim. Crop. Export.
Dual Recorder: Dual Camera is coming to the App Store for iPhone.