How to Clear Cache on iPhone: A Step-by-Step Guide

Your iPhone Is Slowing Down — Here’s What’s Actually Going On

Apps taking forever to load. Safari freezing mid-scroll. Your phone feeling like it aged five years overnight. Sound familiar? Before you start panicking about storage or blaming the latest iOS update, there’s a good chance cached data is quietly piling up in the background.

Clearing cache on iPhone isn’t a single button you press — Apple doesn’t give you one master “clear everything” option like Android does. Instead, it’s spread across different apps and settings. A little annoying, sure, but once you know where to look, it takes about five minutes total.

This guide walks you through every method, step by step, so you can free up space and get your iPhone running smoother without accidentally deleting anything you actually need.

What Is Cache, and Why Does It Build Up?

Cache is temporary data your phone stores to help apps and websites load faster. When you visit a website, Safari saves images, scripts, and layout files so the next visit is quicker. Apps do the same — they store data locally so they don’t have to re-download everything from scratch each time you open them.

The problem is that cache accumulates over time. Old data from websites you’ll never visit again, outdated app files, thumbnail previews — it all adds up. On a phone with limited storage, this can genuinely slow things down or eat into space you need for photos and apps.

Clearing it periodically is just good digital hygiene. You won’t lose passwords, app progress, or personal files. You might just have to log back into a few websites, which is a fair trade.

How to Clear Cache on iPhone in Safari

Safari is usually the biggest culprit. If you use it as your main browser, it builds up a surprising amount of cached data — especially if you browse a lot of news sites, social media, or streaming pages.

1. Open the Settings app on your iPhone.
2. Scroll down and tap Safari.
3. Scroll to the bottom of the Safari settings page.
4. Tap Clear History and Website Data.
5. A prompt will appear — tap Clear History and Data to confirm.

This removes browsing history, cookies, and cached files all at once. Your open tabs won’t disappear, but you will be logged out of any websites you were signed into through Safari.

Want to Keep Your History but Clear the Cache?

If you’d rather keep your browsing history and just clear stored website data, you can do this through a slightly different path:

1. Go to Settings → Safari → Advanced → Website Data.
2. Here you’ll see a list of every site that has stored data on your device.
3. Swipe left on individual sites to delete them, or tap Remove All Website Data at the bottom.

This gives you more control, especially if you want to clear cache for a specific site that’s misbehaving without nuking everything.

Clearing Cache in Third-Party Browsers

If you use Chrome, Firefox, or another browser on your iPhone, they each have their own cache stored separately from Safari.

Google Chrome

1. Open Chrome and tap the three dots in the bottom right corner.
2. Tap History, then Clear Browsing Data.
3. Choose a time range and check Cached Images and Files.
4. Tap Clear Browsing Data to confirm.

Firefox

1. Open Firefox and tap the menu icon (three horizontal lines).
2. Go to Settings → Data Management.
3. Toggle on Cache and tap Clear Private Data.

How to Clear App Cache on iPhone

Here’s where things get a bit more fragmented. iOS doesn’t have a centralized app cache cleaner. Each app manages its own temporary data, and how you clear it depends on the app itself.

The Offload Method (Works for Almost Any App)

This is the most reliable method for clearing an app’s cached data without permanently deleting the app or losing your account info:

1. Go to Settings → General → iPhone Storage.
2. Find the app you want to clear and tap on it.
3. Tap Offload App.
4. Once offloaded, tap Reinstall App.

Offloading removes the app and its temporary data but keeps your documents and data intact. Reinstalling it pulls a fresh version from the App Store. It’s essentially a soft reset for that app.

For Apps That Have a Built-In Cache Option

Some popular apps give you direct control. Here’s a quick comparison:

Worth checking inside any app you use frequently — more apps are adding this feature than you’d expect.

Clearing Your iPhone’s System Cache

Beyond individual apps and browsers, iOS itself stores system-level cache — things like RAM usage, background process data, and temporary system files. Apple clears most of this automatically, but there are two things you can do manually.

Restart Your iPhone

A simple restart clears RAM and flushes out a lot of temporary system data. It’s not glamorous, but it works. If your iPhone has been running for weeks without a restart, you might be surprised how much snappier it feels after one.

• iPhone X or later: Hold the side button + volume down until the power slider appears. Slide to power off, then press the side button to restart.
• iPhone SE or older models: Hold the top or side button until the slider appears, then slide to power off.

Reset Network Settings

If you’re having issues specifically with connectivity — slow Wi-Fi, apps not syncing, iMessage glitching — resetting network settings can help. This clears cached network configurations and saved Wi-Fi passwords.

1. Go to Settings → General → Transfer or Reset iPhone.
2. Tap Reset → Reset Network Settings.
3. Enter your passcode if prompted and confirm.

Note: you’ll need to re-enter Wi-Fi passwords after doing this, so have those handy before you proceed.

How Much Space Can You Actually Free Up?

It varies wildly depending on how you use your phone. Light users might reclaim a few hundred megabytes. Heavy users — people who stream a lot, scroll social media daily, or have dozens of apps — can sometimes free up several gigabytes.

To get a realistic picture before you start:

1. Go to Settings → General → iPhone Storage.
2. Wait for it to load — it takes a few seconds to calculate.
3. Scroll through the app list and look for anything that seems unusually large relative to what the app actually does.

If an app is showing “Documents & Data” sizes in the gigabytes, that’s a sign it’s hoarding a lot of cached content. Offloading it is almost always worth it.

Common Questions About Clearing iPhone Cache

Will I lose my photos or contacts?

No. Photos, contacts, messages, and app data saved to iCloud are completely separate from cache. Clearing cache only removes temporary files — nothing personal gets deleted.

How often should I clear my cache?

There’s no hard rule. If your phone is running fine and you have plenty of storage, you don’t need to do it on a schedule. Most people benefit from clearing browser cache every month or two and checking app storage every few months.

Does clearing cache actually speed up my iPhone?

Sometimes, yes — especially if storage was nearly full. iPhones slow down noticeably when internal storage is over 85–90% full because iOS needs free space to perform background operations. Clearing cache can push you back under that threshold.

Is there an app that clears cache automatically?

Be cautious here. Many “phone cleaner” apps on the App Store make big promises but can’t actually access system-level cache due to iOS sandboxing restrictions. Some are outright scams. The methods in this article are free, built-in, and more effective than most third-party cleaners.

One Last Thing Before You Close the Settings App

Clearing cache on iPhone is genuinely simple once you know where everything lives — it’s just scattered across different menus instead of one convenient button. Safari, individual apps, and system-level restarts cover the vast majority of what you’d ever need to clear.

Make it a habit to check your iPhone Storage page every couple of months. That single screen tells you everything — which apps are bloated, how much space you’re working with, and where a quick offload or cache clear could make a real difference.

Your iPhone will thank you. Or at least, it’ll stop freezing mid-scroll — which is basically the same thing.