An offline video editor that keeps your footage

None of that is a reduced offline mode that catches up later. There is no server-side version of the editor, because there is no server. The reason the app works in airplane mode is that airplane mode was never removing anything from it.

When you bring a video, a track or an image into a project, a copy is made in the app's own private storage. That is deliberate: projects keep working when you tidy your camera roll, move a file or clear something out of Photos.

Those copies:

• never leave your device;
• are not accessible to other apps;
• are deleted when you remove them from the app, delete the project they belong to, or uninstall the app.

Some formats also get a smaller preview copy made at import so the timeline stays smooth while you work. Export never uses it: the render always goes back to your original footage, so the preview being lighter costs you nothing in the finished file.

An exported video is saved to your gallery when you ask for it. What happens after that is between you and whatever you share it with.

Two honest footnotes

Dictation uses your phone's speech recognition. When you speak an instruction instead of typing it, the audio goes to your device's own speech service and comes back as text. Clip Smasher receives the text, never the audio, and keeps no recording, but whether your phone does that recognition locally or through its own vendor is an operating-system setting, not something this app controls. If that matters to you, type the instruction instead.

There is a version check. The same request that fetches the phrasing list can also tell the app that a build is too old to run. It fails open by design: a timeout, a dead connection or a server error all leave the editor open, because locking someone out of their own projects over a failed request would be worse than anything an old build could contain.

The full detail is in the privacy policy, which is written to be read rather than to be survived.

An editor that renders in the cloud has to get your footage there first. For a phone that means uploading gigabytes over whatever connection you happen to have, waiting, and then downloading the result, and it means your unreleased footage sitting on somebody's servers with a retention policy you did not write.

Editing on the device removes all of that. There is nothing to upload, so there is no wait before you can start and no queue at the end. It also removes the failure mode where an app you paid for stops working because a service was retired.

What you give up is other people's hardware, and modern phones are fast enough that this matters much less than it used to. A 4K project renders at 4K (resolution is not quietly reduced to save time), and a render keeps going when you put the phone down.

Where this actually helps

• Travelling. Cutting on a plane, a train or a boat, with the whole editor available and nothing to sync.
• Bad connections. A festival, a job site, a rural shoot, a hotel that meters its wifi.
• Data caps and roaming. Editing 4K footage costs no data at all.
• Footage you cannot upload. Client work under NDA, medical or legal material, or anything simply not yours to put on a third party's server.