First, see what’s actually using your storage
Open Settings › General › iPhone Storage. The bar at the top breaks your storage down by category, and iOS lists personalized recommendations underneath. On most phones Photos is the single biggest slice.
Don’t act on the panic yet. Knowing whether the problem is photos, videos, apps or “System Data” tells you where the real gigabytes are — deleting three apps won’t help if 40 GB is video.
Clear photos the safe way
In Photos, anything you delete moves to Recently Deleted, where it stays recoverable for 30 days before iOS removes it for good. That means deleting is reversible — but also that space isn’t freed until those 30 days pass (or you empty Recently Deleted manually).
Mark the keepers as Favorites first so you never trash them by accident. Then work through the obvious waste: screenshots, blurry shots, near-duplicate bursts and big videos you never watch.
Find the big stuff, not just lots of little stuff
Deleting 500 small photos frees less space than deleting two 4K videos. Sort by what actually weighs the most: long videos, screen recordings, and the gigabytes of images you saved from other apps (memes, receipts, forwards) and never looked at again.
A focused tool helps here. Kept scans your library on-device and shows each category with the space it would free — so you clear the heavy piles first.
Use iCloud and Optimize Storage wisely
Turning on iCloud Photos with Optimize iPhone Storage keeps full-resolution originals in iCloud and lighter versions on the phone. It buys breathing room, but it’s storage management, not cleanup — your library still grows, and you may pay for more iCloud over time.
Important: with iCloud Photos on, deleting a photo on your iPhone deletes it everywhere. Recently Deleted still protects you for 30 days, but treat the sync as real.
Make it a habit, not a once-a-year panic
A camera roll fills up constantly, so a single heroic cleanup never lasts. A few minutes every week or two beats a dreaded annual purge — and it’s far less likely to end in a mistaken delete.
This is exactly what Kept is built for: it pre-judges each photo (“keep — best of 9” / “trash — blurry duplicate”), you confirm with a swipe, and every delete routes to Recently Deleted. Cleaning by hand is free.