An iPhone cache stores temporary data so websites and apps load more quickly, and it usually does not need regular attention. Clearing it can help resolve misbehaving apps or reclaim a small amount of space, but it is only a short-term measure because the phone will rebuild cached data.

Safari’s cache can be cleared through its history controls, though this also removes browsing history, cookies, permissions and saved sign-ins; Chrome allows users to delete cached images and files more selectively. iOS has no direct system-cache control, so restarting the phone clears temporary system files without deleting permanent data, while some apps such as Spotify, TikTok, Discord and Telegram include their own cache-clearing settings.