Phone storage fills up faster than it should, and the culprits are rarely what you expect. The photos you know about. The Spotify cache you probably don't. Both iOS and Android bury useful space-saving tools inside settings menus that most people never open. This guide works through them in order, from the highest-impact actions to the smaller cleanup tasks.
Step 1: See What Is Actually Using Your Space
On iPhone
Go to Settings > General > iPhone Storage. Wait a few seconds for it to calculate. You'll see a color-coded bar at the top showing how storage is split across categories, then a full app-by-app list sorted by size. Each app entry shows the app size and the documents and data it has accumulated separately.
The list is actionable: tap any app to see options to offload or delete it. Look carefully at apps you haven't opened in months that are holding gigabytes of data.
On Android
Go to Settings > Storage. The exact path varies by manufacturer but it's always under Settings. Android shows a category breakdown: apps, photos and videos, audio, downloads, other. Tap any category to see what's inside it. On Pixel phones, Google Files app gives a cleaner view with one-tap cleanup suggestions.
Step 2: Photos and Videos (Usually the Biggest Chunk)
Photos and videos typically account for 30 to 60 percent of used storage on most phones. The fix is moving them off the device while keeping them accessible.
iPhone: Optimize Storage
Go to Settings > Photos and enable Optimize iPhone Storage. With iCloud Photos turned on, this keeps lower-resolution versions on your device and stores originals in iCloud. The photos still appear in your camera roll and open at full quality when you tap them. Free iCloud storage is only 5 GB, so you may need a paid plan ($0.99/month for 50 GB) for a large library.
Android: Google Photos Backup
Open Google Photos and go to Library > Utilities > Free up space. Google Photos backs up everything, then offers to delete local copies of already-backed-up items. Free storage on Google Photos is 15 GB shared with Gmail and Drive. After backup is confirmed, the delete is safe.
Step 3: Offload Apps You Rarely Open
iPhone: Offload Unused Apps
In Settings > General > iPhone Storage, scroll down to find the Offload Unused Apps option at the top. Enable it. iOS will automatically remove apps you haven't opened in a while, keeping the icon and all your data, but freeing the space the app binary occupied. Tapping the icon reinstalls the app when you need it again.
You can also offload individual apps manually from the same list — useful for large games you play seasonally.
Android: Archive Apps
Android 12 and later support app archiving in the Play Store. Tap your profile icon in Play Store, go to Manage apps & device > Manage, and look for the Archive option on apps that support it. Like iOS offloading, it keeps the icon and data while removing the app files.
Step 4: Clear App Caches
Streaming and social apps accumulate large caches of downloaded content that can be cleared safely. The app re-downloads what it needs.
- Spotify: Settings > Storage > Clear cache. This removes downloaded audio caches. Re-download offline playlists afterward if you use them.
- Netflix / streaming apps: Downloads section usually has a delete all button for offline content.
- Podcasts app: Delete played episodes. Most podcast apps accumulate gigabytes of episodes you've already heard.
- Maps (Google Maps, Apple Maps): Offline maps can be large. Check your downloaded areas and delete regions you no longer need.
On Android, you can clear any app's cache directly in Settings > Apps > [App name] > Storage > Clear Cache. On iPhone, most apps must clear their own cache from within the app settings, or you can delete and reinstall the app entirely.
Step 5: Check Your Downloads Folder
On Android, the Files app shows a Downloads folder that accumulates PDFs, APKs, images sent in emails, and random files over time. It is almost always safe to delete everything in Downloads older than a few months. On iPhone, the Files app shows a Downloads folder under On My iPhone — same situation.
Step 6: Messages and Media Attachments
Group chats and long text conversations accumulate photos, videos, voice notes, and GIFs. On iPhone, go to Settings > General > iPhone Storage, scroll to Messages, and tap it — you'll see how much space messages are using with options to review large attachments. You can also open a conversation, tap the contact name at the top, and review Photos and Attachments to delete selectively.
On Android, messaging apps vary, but most have a Storage option in their settings with attachment management. WhatsApp in particular stores all received media in a separate folder you can find through the Files app.
What to Skip
Do not bother with "storage cleaner" or "RAM booster" apps from the Play Store or App Store. They rarely free meaningful space, frequently ask for invasive permissions, and some are outright malicious. The built-in tools on both platforms do the real work.
Quick Reference
- Biggest win: Optimize photo storage via iCloud Photos or Google Photos backup
- Second biggest: Offload/archive rarely-used apps
- Easy cleanup: Clear streaming app caches and delete Downloads folder contents
- Hidden storage drain: Message attachments and podcast episodes
Work through these in order and most phones can recover several gigabytes without deleting anything you actually want to keep.