TL;DR: To free up storage on iPhone, open Settings > General > iPhone Storage and follow the recommendations at the top. Then turn on Offload Unused Apps (Settings > Apps > App Store), switch on Optimize iPhone Storage for iCloud Photos, merge duplicate photos, and set Keep Messages to 1 year or 30 days. Empty Recently Deleted in Photos and Messages when you’re done, because deleted items sit there for up to 30 days. None of this requires a cleaner app.
Last updated: November 15, 2026. By Veer. Checked against Apple’s iPhone User Guide for iOS 27, Apple Support articles and the WhatsApp Help Center on that date. It’s a researched guide built from official documentation.
The “iPhone Storage Full” banner tends to appear right before an iOS update or a long video. On most iPhones the space goes to a few places: photos and videos, a handful of large apps, and years of Messages and chat-app media. Apple ships a tool for each, and most don’t delete anything you’d miss.
This guide covers how to free up storage on iPhone in nine steps, from the safest to the most drastic. If your photos aren’t backed up yet, sort that first. Our guide to backing up an iPhone to a PC without iTunes walks through it.
How to free up storage on iPhone: the quick answer
Go to Settings > General > iPhone Storage, tap Show All under the recommendations, and enable the ones that make sense. Then offload apps you rarely use and let iCloud Photos keep smaller copies on the phone. Those three moves usually recover the most space without deleting anything.
Apple advises keeping at least 1 GB free to avoid slowdowns. The nine fixes compared:
| Fix | Where to find it | What you lose | Best for |
|---|---|---|---|
| 1. Check iPhone Storage | Settings > General > iPhone Storage | Nothing | Finding the real culprit |
| 2. Offload unused apps | Settings > Apps > App Store | Nothing; data stays | Large apps you rarely open |
| 3. Optimize iPhone Storage | Settings > [your name] > iCloud > Photos | Nothing, if iCloud has room | Big photo libraries |
| 4. Merge duplicate photos | Photos > Collections > Utilities > Duplicates | Extra copies only | Burst shots and saved images |
| 5. Empty Recently Deleted | Photos and Messages | Items you already deleted | Space that “didn’t come back” |
| 6. Trim Messages | Settings > Apps > Messages > Keep Messages | Old texts and attachments | Years of group chats |
| 7. Clean up WhatsApp | WhatsApp > Storage and data > Manage storage | Chosen media | Heavy WhatsApp users |
| 8. Remove offline downloads | TV app and streaming apps | Offline copies | Travelers |
| 9. Move files to a computer | USB cable to a Mac or PC | Nothing, if copied | Keeping photos without iCloud |
1. Check what’s using space
Open Settings > General > iPhone Storage. A colored bar at the top shows how much space each category uses, and the list below sorts your apps by size. Tap any app to see how much is the app itself and how much is its documents and data.
According to Apple’s storage guide, the categories include Apps, Photos, Media, Mail, Messages, iCloud Drive and a system category. If Photos uses 80 GB and apps use 10 GB, clearing caches won’t change much. Under the recommendations, tap Show All, then Enable a suggestion or open it to review what it would remove.
2. Offload apps instead of deleting them
To free up storage on iPhone without deleting anything, offload apps. Offloading removes the app itself but keeps its documents and data. The icon stays on your Home Screen with a small cloud symbol, and tapping it reinstalls the app with your data in place.
You can do it one app at a time: in Settings > General > iPhone Storage, tap an app and choose Offload App. Or let the iPhone do it automatically. Apple’s iOS 27 user guide says to go to Settings > Apps > App Store and turn on Offload Unused Apps. When storage runs low, the phone removes apps you haven’t used while keeping their data.
To delete an app for good, touch and hold its icon, tap Remove App, then Delete App. Remove from Home Screen only moves it to the App Library and frees nothing, per Apple’s guide to deleting apps.
3. Turn on Optimize iPhone Storage (with iCloud)
For iCloud Photos users, this is usually the biggest win. Full-resolution originals live in iCloud and the phone keeps smaller versions, starting with photos you view least.
In iOS 27, go to Settings > [your name] > iCloud > Photos, make sure Sync this iPhone is on, tap iPhone Storage, and choose Optimize iPhone Storage, per Apple’s article on managing photo and video storage. On iOS 26 or earlier, the Optimize option sits directly on the Photos screen.
The catch is iCloud space. Every Apple Account gets 5 GB free, which fills fast. Apple’s iCloud+ pricing page (checked November 15, 2026) lists these monthly prices:
| iCloud+ plan | US price | UK price |
|---|---|---|
| 50 GB | $0.99 | £0.99 |
| 200 GB | $2.99 | £2.99 |
| 2 TB | $9.99 | £8.99 |
| 6 TB | $29.99 | £26.99 |
| 12 TB | $59.99 | £54.99 |
Before paying, try our guide to freeing up iCloud storage without paying.
4. Merge duplicate photos
The Photos app finds duplicates for you. Open Photos, tap Collections, then Utilities > Duplicates, and tap Merge on a set. Apple’s support article on deleting photos explains that merging keeps one copy with the highest quality and the relevant data, and moves the extras to Recently Deleted.
If you have no duplicates, the collection doesn’t appear at all.
5. Empty Recently Deleted
This is why space often doesn’t come back after a cleanup. Deleted photos, videos, texts and attachments sit in Recently Deleted folders for up to 30 days.
In Photos, tap Collections, open Recently Deleted (below Utilities), tap View Album, unlock with Face ID, Touch ID or your passcode, then tap Select and delete. In Messages, tap the menu at the top of the conversation list, choose Recently Deleted, select conversations and tap Delete. Apple’s iPhone User Guide warns that permanent deletion can’t be undone. With iCloud Photos on, a delete also applies on every device signed in to your account.
6. Shrink Messages with Keep Messages
Years of photos, videos and voice notes in group chats add up. The set-and-forget fix: go to Settings > Apps > Messages, scroll to Message History, tap Keep Messages and choose 1 Year or 30 Days instead of Forever.
Apple’s Messages guide is clear about the trade-off: conversations older than that, including all attachments, are removed automatically. If you use Messages in iCloud, they’re removed from your other devices too. Save anything important first.
For a gentler option, open a conversation, tap the contact or group icon, pick a category such as Photos, then tap Edit > Select and delete only the big items.
7. Clean up WhatsApp media
WhatsApp keeps its own pile of forwarded videos and voice notes. On iPhone, tap your profile picture, then Storage and data > Manage storage. The WhatsApp Help Center says the top of that screen shows roughly how much space WhatsApp uses, and you can open any chat, tap its name and choose Manage storage to see files sorted largest first.
Two warnings from WhatsApp: deleting an item only removes it for you, and copies saved elsewhere on your phone, such as in Photos, keep using space until you delete them there too.
8. Remove offline downloads
Apple’s storage guide calls out videos downloaded in the TV app and other streaming apps. Each app manages its own downloads, so open its downloads section and remove what you’ve already watched.
9. Move photos and files to a computer
To keep your photos without paying for iCloud, copy them off the phone. Connect the iPhone to a Mac or Windows PC with a cable, import your photos and videos, check they open, then delete them from the phone. Apple lists this for anyone who doesn’t want their library in iCloud. Moved over with our Android to iPhone transfer guide? Run the Duplicates step first.
What about System Data and Safari cache?
You can’t clear the system category yourself. Apple describes this storage as things like Siri voices, fonts, dictionaries, logs, caches and the Spotlight index, and says the iPhone removes cached and temporary files on its own when it needs space.
Safari’s cache is usually small. If you still want to clear it, go to Settings > Apps > Safari > Clear History and Website Data, or use Advanced > Website Data > Remove All Website Data to keep your history. Apple’s Safari article notes that removing website data also clears saved sign-in information, so expect to log back in to some sites.
Skip “cleaner” apps; the steps above cover what they promise. If your iPhone also feels slow, see our guide to checking iPhone battery health.
Verdict
For most people, three steps do the heavy lifting: Optimize iPhone Storage, Offload Unused Apps, and Keep Messages set to a year. Then merge duplicates and empty both Recently Deleted folders. Pay for iCloud+ only if your library has outgrown 5 GB. Android phone in the family? Our Android storage guide covers Pixel and Galaxy.
FAQ
How do I free up storage on iPhone without deleting anything?
Turn on Offload Unused Apps in Settings, then Apps, then App Store, so unused apps are removed while their data stays. Turn on Optimize iPhone Storage for iCloud Photos so the phone keeps smaller copies.
How do I free up storage on iPhone without deleting photos?
Use Optimize iPhone Storage in Settings, then your name, then iCloud, then Photos. Full-resolution originals stay in iCloud and the phone keeps space-saving versions. If you don’t want to pay for iCloud+, copy the photos to a Mac or PC with a cable first.
Why is my iPhone storage still full after deleting photos?
Deleted photos and videos stay in Recently Deleted for 30 days. Open Photos, tap Collections, open Recently Deleted below Utilities, unlock it and delete the items permanently. Messages has its own Recently Deleted folder.
What is the difference between offloading and deleting an app?
Offloading removes the app but keeps its documents and data; tap the cloud icon to reinstall. Deleting removes the app and its data from the iPhone.
How much does more iCloud storage cost?
iCloud+ starts at $0.99 (£0.99) a month for 50 GB. 200 GB is $2.99 (£2.99) and 2 TB is $9.99 (£8.99). Every Apple Account includes 5 GB free.
Can I clear System Data on iPhone?
Not directly. Apple says the iPhone removes cached and temporary files automatically when it needs more space.
Sources checked November 15, 2026: Apple iPhone User Guide for iOS 27 (Manage storage, Delete messages and attachments, Delete or hide photos, Merge duplicates, Remove or delete apps), Apple Support articles 108429, 102598, 105061, 108782, 104967, 105082 and 108047 (iCloud+ pricing), and the WhatsApp Help Center. This guide is based on official documentation only.
