App cache
Also known as: cached data, clear cache, cache files
An app cache is temporary data an app stores to load faster — images, thumbnails, streamed media, and web content. Clearing it is safe: the app simply re-downloads what it needs the next time you use it.
- Temporary, re-downloadable data
- Safe to clear — never touches accounts or saved files
- Android clears per app; iOS has no universal button
Why apps build a cache
Caching trades storage for speed. Instead of re-downloading the same images or videos every time, an app keeps a local copy so screens load instantly. Social, streaming, and browser apps cache the most.
The downside is that caches grow quietly. A single chat or streaming app can hold several gigabytes of cached media you will never look at again.
Is clearing the cache safe?
Yes. Cache is, by definition, data the app can recreate. Clearing it never deletes your account, messages, or saved files — only the temporary copies. On Android you clear it per app in Settings > Apps > [app] > Storage > Clear cache; on iOS most apps rebuild cache automatically or expose an in-app option, since iOS has no universal cache button.