Affiliate disclosure, up front: SmartClean is our own app and links to it earn us money. Links to every other app here earn us nothing. How this works
Slidebox
Slidebox still gets updates. The last one was 31 July 2026, and the app has been out since 2019. It cleans four things: duplicate photos, big videos, Gmail and contacts. The store page leaves out two things. It needs iOS 16. And it eats 36 MB before it frees a single one.
Which one you should install
It cleans more than any other app here, Gmail included. Pick it if you have room to install it.
Get Slidebox Not our app. We earn nothing here.Open Settings → General → iPhone Storage. Under 300 MB left? Or an iPhone 7 or older? Then Slidebox cannot install at all. It needs iOS 16 and 36 MB free. SmartClean needs iOS 13 and 51 MB.
What it actually does
Most iPhone cleaners do one job. Slidebox does four in one app. That is the main reason to pick it.
- Duplicate and similar photos. It scans your photos, groups the near-copies, picks the sharpest one, and deletes the rest in one tap. This is where most of the freed space comes from.
- Contact merging. It finds and merges double entries. Barely helps storage, but it tidies things up.
Three limits worth knowing
The release notes say little more than "we fixed some bugs". Years into a product, a list of what actually changed would be reasonable.
The store says "Free". You only see the real price after you install and sign up. We are not giving a number here, because Apple does not publish one, and a made-up number is worse than none.
The numbers, from the App Store
| Developer | Slidebox LLC |
| First released | 16 June 2015 |
| Current version | 26.719.0 · 31 July 2026 |
| Download size | 36 MB |
| Minimum iOS | 15.0 |
| Rating | 4.81 out of 5 · 16,361 ratings |
| Price | Free download, subscription unlocks full cleanup |
| Languages | English, German, French, Italian, Dutch, Arabic, Hebrew, Japanese |
Pulled from Apple's public App Store catalogue on 31 July 2026.
How it compares
| Slidebox | Cleanup | SmartClean (ours) | |
|---|---|---|---|
| Ratings | 16,361 | 693,974 | 32 |
| Last update | 2026-07-31 | 2026-07-27 | 2026-08-05 |
| Minimum iOS | 15.0 | 15.0 | 13.0 |
| Download size | 36 MB | 166 MB | 51 MB |
| Get | Read | Get · 51 MB |
Why ours ticks fewer boxes. We left out video squeezing and email cleaning on purpose. Both need big chunks of code on the phone. That code is what pushes these apps past 150 MB. Leaving it out is how SmartClean stays at 51 MB and still runs on iOS 13. If you want all four jobs in one app, and your phone can take it, Slidebox is the better buy. We are not going to pretend otherwise.
Read it straight: Slidebox has 16,361 ratings against our 32, so on track record it is far ahead of us. Where ours wins is size and older iPhones. If your phone is new and has room to spare, Slidebox is the stronger pick.
Links to SmartClean are our own app and earn us money. The other links do not. Both are here so you can check the comparison yourself.
Links to SmartClean are our own app and earn us money. The Slidebox link does not. Both are here so you can check the comparison yourself.
Questions people ask
Is Slidebox safe?
On the App Store since 2019, published by a named company with a public website, and it passes Apple's review on every update, most recently 31 July 2026. That is not an independent security audit, and we have not run one. Deletion is irreversible, so review the selection before confirming.
Is it really free?
The download is. Full cleanup needs a subscription whose price is not published in the App Store catalogue, only inside the app. Check it on the subscription screen before agreeing.
How much space will it free?
Depends entirely on how many duplicates and large videos you have, so any figure here would be invented. Its own scan shows the number before you delete anything.
Will it work on my old iPhone?
Only on iOS 16 or later, which means iPhone 6s and newer. Anything older cannot install it.
Slidebox or Cleanup?
Cleanup has 693,974 ratings against 16,361, and it is bigger at 166 MB. Both do the same core job. See the table above.