Search the App Store for "cleaner" and nearly every result is free to download. Very few are free to use. The usual pattern: a scan runs instantly, a big red number appears, and the delete button opens a paywall with a three-day trial that renews at around $5–8 a week.
This list covers what is actually free, what is not, and what iOS already does without any app.
How we picked
Every option, including our own, was judged on five questions:
- Can you delete without paying? A free scan with a paid delete button is not free.
- Are there ads?
- Do your photos stay on the device?
- Do you see every item before it is deleted?
- Does it do something iOS cannot do on its own?
Full disclosure: FreeMemory is our app. Where another option is better, we say so. Prices and features below were checked in October 2026 — check the App Store listing before you install, as both change often.
Before you install anything: what iOS already does
- Photos → Duplicates (iOS 16+) finds and merges exact duplicates for free.
- Photos → Screenshots collects every screenshot so you can select and delete in bulk.
- Settings → General → iPhone Storage offloads unused apps and reviews large Messages attachments.
- Optimize iPhone Storage moves full-size originals to iCloud, if you have the space.
What iOS does not do: sort your library by file size, show how much space each group uses, put large videos, duplicates and screenshots in one list, or compress photos. That gap is the only reason to install a cleaner.
The comparison
| App | Free to delete? | Ads | Subscription | Duplicates | Similar photos | Photo compression | |---|---|---|---|---|---|---| | Apple Photos (built-in) | Yes | No | No | Yes | No | No | | FreeMemory | Yes | No | No | Yes | No | Yes | | Clever Cleaner | Yes | No | No | Yes | Yes | Live Photos + video | | Gemini Photos | Trial, then paid | No | Yes / one-time | Yes | Yes | No | | Slidebox | Basic free | No | Optional premium | Swipe review | Swipe review | No | | Cleanup, Smart Cleaner and similar | Trial, then paid | Varies | Weekly / yearly | Yes | Yes | Varies |
Apple Photos (built-in)
Best for: anyone who only needs duplicates and screenshots gone.
The Duplicates album is genuinely good. It keeps the highest-quality copy and merges metadata. The downsides are that it only appears after indexing (usually overnight while charging), shows no sizes, and covers nothing but duplicates.
FreeMemory
Best for: clearing storage in one pass, with no ads, no subscription and no uploads.
One scan of your Photos library groups duplicates, the largest videos and photos (sorted by size), screenshots, and photos that can be compressed. Screenshots and large media can be reviewed card by card with swipes. Anything you remove goes to an in-app Bin first, so you can restore it, and then to iOS Recently Deleted. The Optimizer downsizes oversized photos — often around 75% smaller — and asks before touching the originals.
Where it falls short: it does not detect similar photos (burst shots, near-identical selfies), and it does not compress videos. Clever Cleaner does both.
Clever Cleaner
Best for: similar-photo detection and video compression, free.
Made by CleverFiles (the Disk Drill team), Clever Cleaner is free with no ads and no paywall at the time of writing. It finds similar photos as well as duplicates, and compresses Live Photos and videos. If similar-photo cleanup is your main goal, it is the better free choice than FreeMemory.
Gemini Photos
Best for: people who want the strongest "best shot" suggestions and do not mind paying.
From MacPaw, Gemini picks the best photo in a group of similar shots and flags blurry photos and photos of notes. It is polished, but the full feature set is behind a subscription or one-time purchase after the trial.
Slidebox
Best for: going through a messy camera roll by hand.
Slidebox is a swipe-to-sort organizer rather than a scanner: swipe up to delete, tap to file into albums. Basic use is free, with a premium tier for larger libraries and extras.
Cleanup, Smart Cleaner and similar apps
Best for: avoiding, unless you read the subscription terms first.
These are among the most downloaded cleaners on the App Store, and the scanning works. The problem is the business model: a free scan, a paywall on delete, and trials that renew weekly. Their reviews are dominated by billing complaints rather than features. We cover the pattern in the weekly-subscription trap.
What to avoid in any iPhone cleaner
- "Junk", "cache" or "RAM" cleaning. iOS does not allow it. The number is fiction.
- A paywall before you can review results.
- A trial that starts automatically when you tap "Continue" on the first screen.
- Requests for contacts, location or an account that a photo cleaner does not need.
Which one to install
- Only duplicates? Use the free Duplicates album in Photos.
- Storage full and you want one scan for videos, duplicates, screenshots and compression? FreeMemory.
- Lots of near-identical shots or big videos to compress? Clever Cleaner.
- Willing to pay for best-shot picking? Gemini Photos.