Your iPhone keeps a significant amount of temporary data beneath the hood during normal operation. Much of this data is stored on your device to speed things up and limit the quantity of data that must be downloaded through your cellular or Wi-Fi data connection on a regular basis. This data is known as “cached” data because it is information from somewhere else that has been copied to a location on your device where it can be reused for faster access.
Your web browser has the most prevalent type of cached data. Because we frequently visit dozens of the same websites on a daily basis, browsers such as Safari and Chrome save local versions of webpages and their static assets such as logos and graphics so they don’t have to download them again every time you visit the same website. However, this is not the only way caches are used; numerous third parties cache various sorts of data locally for similar reasons. Facebook and Instagram, for example, will cache social media postings you’ve just read, and Google Docs will cache everything you’ve lately worked on — even if the actual docs are saved in the cloud.
Although each program does its best to restrict how much data is cached, some of them might grow rather large over time. Apple’s built-in apps are generally better at this — they’ll start deleting superfluous data when your iPhone runs out of space — but third-party browsers like Chrome, as well as other apps with their own caches, aren’t nearly as attentive.
Because the majority of iPhone users use Safari as their primary browser, this is where the majority of your cached data is saved. Even whether you use Chrome, Firefox, Edge, or another browser, it’s a good idea to read the instructions below because many third-party apps still use the underlying Safari engine when opening webpages.
This will display a list of all the sites that keep cached information, cookies, and other data in Safari on your iPhone, arranged by the amount of space each one requires, in descending order. The top number represents the total quantity of space taken up by all cached sites.
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