Video editor apps fill your storage because each one keeps three growing layers: a temporary cache, every draft you have opened, and copies of the videos you exported. The fast, safe fix is to clear each app's cache — on iPhone via Settings > General > iPhone Storage > [app] > Offload App, on Android via Settings > Apps > [app] > Storage > Clear cache. The bigger gigabytes come from old drafts and duplicate exports, which you have to clear deliberately so you do not lose work in progress.

TL;DR

  • Editors store three layers: cache (temporary), drafts (your editable projects), and exports (finished videos).
  • Cache is always safe to clear; drafts and exports are your actual work and need a manual judgment call.
  • Most exports are duplicated into your Photos library, so the in-app copy is often deletable.
  • iPhone: Offload App clears cache and binary while keeping drafts; Android: Clear cache, not Clear storage.
  • Back up exports you care about before deleting drafts — none of these apps have an undo.

Why does one short video leave so much behind?

Because editing is media-heavy by nature. When you import clips, the app generates previews and scratch files (the cache). When you save a project, it bundles or references those source clips inside a draft, so a single draft can be hundreds of megabytes. When you export, it renders a new full-resolution video, usually saving it to Photos and sometimes keeping a copy inside the app too.

Do that across CapCut, InShot, VN, and a couple of others, and you are storing the same footage several times over. The phone is not broken; the apps are just doing what editors do.

What is safe to clear vs what is your real work?

The cache is always safe. It is regenerated on demand, so clearing it costs nothing but a brief reload. Drafts and exports are different — those are your work, and no automatic tool can tell a finished masterpiece from an abandoned test. The honest rule: clear cache freely, but treat every draft and export as a manual decision with a backup in place first.

How do I clear editor caches on iPhone?

Start in each app's own settings where a Clear cache option exists (CapCut and VN have one; InShot does not). Then go to Settings > General > iPhone Storage, tap each editor, review its size, and use Offload App. Offloading removes the app binary and its cache while keeping your documents and data, so drafts survive and the app reinstalls in a tap. For an app with no drafts worth keeping, deleting and reinstalling is the most thorough reset.

Use the iPhone Storage screen as your map — it ranks apps by size, so you can see at a glance which editor is the worst offender.

How do I clear editor caches on Android?

For each app, go to Settings > Apps > [app] > Storage > Clear cache. This wipes the temporary layer safely and keeps your account, drafts, and exports. Many editors also have an in-app Clear cache in their own settings — either works.

Avoid the Clear storage (or Clear data) button on that same screen unless you mean to reset the app entirely. It deletes drafts and downloaded packs and signs you out. It is a factory reset, not a cleanup.

What iOS and the apps do natively, and where they stop

iOS can Offload large apps automatically if you enable it, and most editors offer a manual cache clear. Both handle the temporary layer well. Where they stop is identical across every app: they never delete your drafts or exports, because to them that is your work. The judgment about which projects are dead and which exports are duplicates is always yours.

A smart routine that keeps editors small

Once a month, do this in order. First, export anything you want and confirm it landed in Photos or a cloud drive. Second, delete drafts you have finished with inside each app. Third, clear each app's cache (in-app, then Offload on iPhone or Clear cache on Android). Fourth, open Photos and remove oversized exports you no longer need. That sequence means you only ever delete a draft after its export is safely backed up.

For the Photos step, how to find and delete large videos on iPhone without deleting photos helps you target the heavy files, and how to offload large apps on iPhone to reclaim gigabytes covers the offload step across your whole device.

What clearing caches cannot do

Clearing caches will not reclaim the gigabytes locked up in drafts and exports, and it will not de-duplicate videos already copied into Photos. Deleting a draft or using Clear storage is permanent, with no trash can in any of these apps. Always back up the exports you value and verify the backup before deleting anything that is genuinely your work.

FAQ

Which uses more space, the cache or the drafts?

Usually the drafts and exports. The cache can be large after heavy editing, but it is temporary and regenerates. Drafts each carry their own source media, and exports are full-resolution videos often duplicated into Photos, so together they account for most of an editor's footprint.

Will clearing the cache log me out or lose my settings?

Clearing the cache (in-app or via Android's Clear cache) keeps you signed in and preserves your projects. Only Clear storage on Android or deleting the app resets settings and removes drafts. On iPhone, Offload App keeps your data and sign-in intact.

Is it safe to delete a video from inside an editor if it is in my Photos?

Yes, once you have confirmed the export is really in your Photos library or a cloud drive. The in-app copy is then a duplicate, and removing it frees space without losing the video. Verify it exists in Photos first, because there is no undo inside the editor.

When you would rather not audit every app by hand, Cleanor for iPhone finds the duplicate exports, oversized videos, and app bloat these editors leave behind so you can free up iPhone space in minutes.