Facebook on my iPhone has been loading slowly and showing old posts/images, so I think the app cache may be the issue. I want to clear the Facebook cache without deleting or reinstalling the app because I don’t want to lose settings or sign back in. What’s the best way to do this on iOS?
I’d start with the Facebook app itself if it’s sitting at something ridiculous like 10GB or 15GB. iOS doesn’t give you a clean “Clear Cache” button the way Android does, so you’re stuck using the storage options Apple gives you.
Go to Settings > General > iPhone Storage, then find Facebook.
If you want the safer, less annoying option, try Offload App first. That removes the app from your phone but keeps its documents and data. When you tap the Facebook icon again, iOS downloads the app back, and a chunk of the temporary junk usually gets cleaned out. The nice part is that this normally does not sign you out, so it’s pretty painless.
But if Facebook has grown into a monster, offloading may not do much. A lot of the space is usually buried in Documents & Data, meaning cached videos, images, web stuff, and whatever else Facebook has been collecting while you scroll.
For the real cleanup, use Delete App from that same iPhone Storage screen, then reinstall Facebook from the App Store. That wipes the local app data and cache completely.
And yes, deleting the app will log you out. You’ll need to sign back in after reinstalling it. But it won’t delete your Facebook account, posts, photos, friends, messages, or anything like that. Those are stored by Facebook, not only on your iPhone. You’re just clearing the copy of app data sitting on your device.
There’s also a smaller cleanup option inside Facebook:
Menu > Settings & Privacy > Settings > Browser
From there, you can clear the in-app browser cookies and cache. It can free up a little space from sites you opened through Facebook links, but don’t expect it to fix a 15GB Facebook install by itself.
The annoying part is that this is temporary. Facebook will start rebuilding its cache as soon as you use it again, especially if you watch a lot of Reels or scroll through image-heavy posts. You can delete and reinstall it today, then see the storage number creep back up after normal use.
I eventually realized Facebook wasn’t the main reason my iPhone storage kept filling up. The bigger mess was my Photo Library: duplicate shots, old screenshots, and huge 4K videos I forgot were even there.
That’s where something like Clever Cleaner is more useful. It won’t clean Facebook’s cache, because iOS doesn’t really let third-party apps do that automatically. But it does help with the stuff that usually eats the most storage: photos and videos.
The Heavies section shows your largest media files, so you can quickly find the giant videos taking up space. The Similars section groups together near-duplicate photos, like all those repeated attempts at the same picture, and shows the file sizes so you can decide what to keep. It also shows screenshot sizes, which is useful because those pile up fast.
Another good thing is that the processing happens on-device, so your photos aren’t being uploaded somewhere else for cleanup.
So if Facebook is huge right now, delete and reinstall it to get some space back quickly. But if your iPhone keeps yelling about storage, check your photo library too. Cleaning out the big videos and duplicate photos usually makes a much bigger difference than chasing Facebook’s cache every week.
2 Likes
Be careful with Offload App: it may leave behind the exact Facebook data you’re trying to clear.
If you don’t want to delete the app, your realistic options are clearing Facebook’s in-app browser data, force-quitting Facebook, and restarting the iPhone. If old images/posts still keep showing after that, the full delete/reinstall is usually the only real cache reset on iOS.