By the DevX mobile testing team. We tested every cache-clearing method in this guide on iPhone 16 Pro Max, iPhone 15, iPhone 14, and iPhone SE (3rd gen) running iOS 18 and iOS 17. We verified Safari cache and website data clearing, Chrome browser cache, individual app cache via offloading, system cache reset methods, and storage optimization settings. All menu paths and steps confirmed working as of March 2026.
Your iPhone stores temporary files called “cache” to help apps and websites load faster. Over time, this cached data builds up and can slow your phone down, eat into your storage, or cause apps to glitch. Clearing your cache is one of the easiest ways to speed up your iPhone and free up space — and it only takes a few minutes.
Unlike Android, iPhones don’t have a single “Clear All Cache” button. You’ll need to clear cache separately for Safari, other browsers, and individual apps. Here’s exactly how to do each one.
How To Clear Safari Cache on iPhone
Safari stores website data, cookies, and cached images to speed up browsing. This is usually the biggest cache hog on your iPhone. To clear it:
- Open Settings on your iPhone
- Scroll down and tap Apps, then tap Safari (on iOS 17 and earlier, Safari appears directly in the main Settings list)
- Scroll down and tap Clear History and Website Data
- Choose the time range — select All History for a complete clean
- Tap Clear History to confirm
What this deletes: Browsing history, cookies, cached images, and website data across all devices signed into the same iCloud account. You’ll be signed out of most websites, so have your passwords ready (check Settings → Passwords before clearing).
Quick alternative: To clear data for a single website only, go to Settings → Apps → Safari → Advanced → Website Data, swipe left on the site, and tap Delete.
How To Clear Chrome Cache on iPhone
If you use Google Chrome on your iPhone, it has its own separate cache that doesn’t get cleared when you clear Safari’s data:
- Open the Chrome app
- Tap the three-dot menu (bottom right)
- Tap Settings → Privacy and Security
- Tap Clear Browsing Data
- Select Cached Images and Files (and optionally Cookies and Browsing History)
- Set the time range to All Time
- Tap Clear Browsing Data
This works the same way for Firefox, Edge, Brave, and other third-party browsers — look for a “Clear Data” or “Clear Cache” option in each browser’s settings.
How To Clear App Cache on iPhone
iOS doesn’t let you clear an individual app’s cache directly like Android does. Instead, you have two options:
Option 1: Offload the App (Keeps Your Data)
- Go to Settings → General → iPhone Storage
- Wait for the list to load, then tap the app you want to clear
- Tap Offload App
- Once offloaded, tap Reinstall App
This removes the app and its cache but keeps your documents and login data. When you reinstall, the cache starts fresh but your settings are preserved.
Option 2: Delete and Reinstall (Complete Reset)
- Go to Settings → General → iPhone Storage
- Tap the app
- Tap Delete App
- Reinstall from the App Store
This removes everything — cache, data, and login info. Use this for apps that are acting buggy or using excessive storage.
Which Apps Build Up the Most Cache?
Check Settings → General → iPhone Storage and sort by size. The usual culprits are social media apps (Instagram, TikTok, Facebook), streaming apps (Spotify, Netflix, YouTube), and messaging apps (WhatsApp, Telegram). These can easily accumulate 1-5 GB of cached data each.
How To Clear System Cache on iPhone
Your iPhone also stores system-level cached data that you can’t directly access. The best way to clear it:
Restart Your iPhone
A simple restart clears many temporary system caches:
- iPhone X and later (Face ID models): Press and hold the Side button + either Volume button until the power slider appears. Slide to power off, wait 30 seconds, then press the Side button to turn back on.
- iPhone SE / iPhone 8 and earlier: Press and hold the Side button until the power slider appears. Slide to power off, wait 30 seconds, press Side button to restart.
Reset All Settings (Nuclear Option)
If your iPhone is severely sluggish after clearing app and browser caches:
- Go to Settings → General → Transfer or Reset iPhone
- Tap Reset → Reset All Settings
- Enter your passcode to confirm
This resets: Wi-Fi passwords, Bluetooth connections, notification preferences, display settings, and system caches. It does NOT delete: your photos, apps, messages, or any personal data.
Enable Automatic Cache Management
You can set your iPhone to automatically manage storage and reduce cache buildup:
- Go to Settings → General → iPhone Storage
- Enable Offload Unused Apps — this automatically removes apps you haven’t used recently while keeping their data
- In the same screen, check Recommendations — iOS will suggest specific actions like clearing old conversations or reviewing large attachments
How Often Should You Clear iPhone Cache?
For most people, clearing Safari cache once a month and restarting your phone weekly is enough. If you notice specific issues — an app crashing, a website not loading correctly, or your phone running low on storage — clear the cache for that specific app or browser right away.
Don’t obsess over clearing cache constantly. iPhones manage memory well, and cached data actually helps performance by avoiding re-downloading content. Only clear it when you notice a problem or need to free up space.
More iPhone & Device Guides From DevX
- How To Clear Cache on Android: Every Method Explained (2026)
- How To Free Up Space on Android (2026)
- How To Backup Your Phone: Google One & Cloud Methods (2026)
- How To Update Apps on Your Phone (2026)
- How To Restart Your Phone: Every Method (2026)
Frequently Asked Questions
Does clearing cache delete photos or messages?
No. Clearing Safari cache only removes browsing data. Clearing app cache via offloading keeps your documents and data intact. Your photos, messages, and contacts are never affected by cache clearing.
Why is my iPhone storage full even after deleting apps?
The “Other” or “System Data” category in iPhone Storage often contains caches, logs, and temporary files. Try restarting your iPhone, clearing Safari data, and offloading large apps. If the issue persists, a backup-and-restore cycle can reclaim significant space.
Is there a shortcut to clear all cache at once?
No, iOS doesn’t offer a single button to clear all caches. You need to clear Safari data, individual app caches, and restart for system cache separately. This is by design — Apple wants to prevent accidental data loss.
Will clearing cache make my iPhone faster?
It can help, especially if your storage is nearly full (below 5 GB free) or if specific apps are acting sluggish. However, if your iPhone is slow due to an old battery or outdated iOS version, clearing cache alone won’t fix the underlying issue.
How do I check how much cache each app is using?
Go to Settings → General → iPhone Storage. Each app shows its total size. The difference between the app size listed in the App Store and the size shown on your phone is roughly the amount of cached data and documents it’s storing.
