RoomForGemsWhen your iPhone says storage is full, it is easy to panic and grab the first cleaner app you see. Please don't, at least not yet. Your iPhone already has good tools for this, and they are free. This guide walks through them in the order worth trying. Most people get back plenty of room without spending anything.
Step 1: See what is actually using the space
Open Settings › General › iPhone Storage. At the top you will see a bar showing how full your phone is, split by type: apps, photos, messages and so on. Below that is a list of apps, biggest first.
Apple's own advice is to start here. Tap an app's name to see how much it uses. For many apps you can delete old documents inside them, too.
Give the screen a moment to load. The numbers can take a little while to settle.
Step 2: Try Apple's recommendations
On that same iPhone Storage screen, you may see a short list of recommendations. Tap Show All to see every one. Read each description, then tap Enable to turn it on, or tap the recommendation itself to review what it would remove.
What you see depends on your phone. Common ones include reviewing large attachments in Messages, and offloading apps you no longer use. Nothing is removed until you choose it.
Step 3: Offload apps you rarely use
Offloading is gentler than deleting. It removes the app but keeps its documents and data. The app's icon stays on your Home Screen with a small cloud symbol. Tap it any time and the app comes back, with your data still there.
To do this one app at a time, tap the app in iPhone Storage and choose Offload App.
To let your iPhone do it for you when space runs low, go to Settings › Apps › App Store and turn on Offload Unused Apps. On older versions of iOS, the App Store settings were not inside an Apps section, so the path looks a little different (not verified).
Step 4: Clear out big Messages attachments
Years of shared photos, videos and voice notes can quietly fill a phone. Messages is often near the top of the storage list.
On the iPhone Storage screen, tap Messages. Look for an option to review large attachments (not verified) that lists files by size. Swipe left on one to delete it.
You can also do it inside a single chat. Open the conversation in Messages, tap the person's name or picture at the top, and tap a category such as Photos. Tap Edit, then Select, pick what to remove, and delete.
There is one catch. Deleted messages and attachments go to a Recently Deleted folder in Messages for up to 30 days. To get the space back sooner, open Messages, tap the menu button at the top of your conversation list, tap Recently Deleted, then select and delete.
If you want this to happen on its own, go to Settings › Apps › Messages, scroll down, and tap Keep Messages. You can choose 30 Days, 1 Year, or Forever. Be careful here. Anything other than Forever removes whole conversations, attachments included, once they pass that age. Save any precious photos to your Photos app first.
Step 5: Empty Recently Deleted in Photos
This one surprises a lot of people. When you delete a photo or video, it does not vanish right away. It goes to the Recently Deleted collection and stays there for 30 days. During that time it can still take up room on your phone.
To clear it now, open Photos and tap Collections. Under Utilities, tap Recently Deleted, then View Album, and unlock with Face ID, Touch ID or your passcode. Tap Select, choose what to remove, and delete.
Take your time with this step. Once you delete from here, it is gone. If you use iCloud Photos, it is gone from your other Apple devices too.
Step 6: Merge duplicate photos
Since iOS 16, the Photos app finds exact duplicate photos and videos for you. On recent versions, open Photos, tap Collections, then Utilities, then Duplicates. On older versions it may be in a different place in Photos (not verified). Tap Merge on a set, then confirm. Photos keeps one copy.
If you have no duplicates, the Duplicates collection simply doesn't appear. The merged extras go to Recently Deleted (not verified), so you may want to repeat Step 5 afterwards. For more detail, see our guide on how to delete duplicate photos.
Step 7: Look at your largest videos
A single long video can be bigger than hundreds of photos. Apple suggests removing content such as videos and apps when you get a "Storage Almost Full" alert. In Photos, look for a Videos collection (not verified). Watch for old long clips you no longer need, or ones already saved somewhere else.
Also check videos you downloaded to watch offline in the TV app or other streaming apps. Apple lists these as a common source of storage use. Remove the ones you have already watched.
Step 8: Let iCloud keep the full-size copies
If you pay for iCloud storage, or your library fits in the free amount, iCloud Photos can help a lot. With Optimize iPhone Storage turned on, your full-quality originals live in iCloud. Your iPhone keeps smaller, space-saving versions and downloads the full ones when you need them.
To check, go to Settings › [your name] › iCloud › Photos and make sure Sync this iPhone is on. Then make sure Optimize iPhone Storage is selected. On the newest version of iOS, you tap iPhone Storage first to find that choice. Apple turns this on by default when you use iCloud Photos, so it may already be set.
One honest note: this needs enough iCloud space for your whole library. If your iCloud is full too, this step may mean paying Apple for more.
Step 9: Restart your phone
After a big clean-up, turn your iPhone off and on again. This can help the storage numbers refresh and let your phone tidy up temporary files (not verified). It costs nothing and takes a minute.
What about System Data?
Sometimes the grey "System Data" part of the storage bar looks huge. Apple describes this area as holding things like caches, logs, Siri voices, fonts and the search index. Your phone clears cached and temporary files itself when it needs room. You can't delete them by hand, and no app can either. We explain more in what is System Data on iPhone.
Where an app can help, honestly
For many people, the steps above are enough. If you are still short on space, it is usually because of photos. That is where RoomForGems can help.
Apple's Duplicates feature looks for exact copies. RoomForGems also finds similar shots, like the six nearly identical photos you took to get one good one. It ranks what it finds by size, so the biggest wins come first. Nothing is deleted straight away. Items go into a review bin you can check, and you have a 30-day safety net to change your mind.
RoomForGems is free to scan and free up to 1 GB, then $9.99 once. There is no subscription. It won't make your phone faster, and it can't touch System Data. See what it can't clean and how we handle your photos.
If you are comparing options, our list of cleaner apps without subscriptions may help. And if you have already signed up for a weekly plan somewhere, here is how to cancel and ask for a refund.