Comparison

Zero Duplicates vs Dupelganger

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Zero Duplicates

Reclaim iPhone storage by finding and deleting duplicate files, even those with different names. Advanced content analysis ensures accurate identification, and a privacy-first design keeps your data local. Safely organize documents, images, videos, and more.

Highlights
  • Advanced content analysis for real duplicates
  • Finds duplicates with different filenames
  • Supports documents, images, videos, audio, and downloads
  • Scans iCloud Drive and external storage
  • Privacy-first local scanning
  • Auto-select duplicates by newest/oldest
  • Preview before deleting
Read full description

Most cleaning apps on the App Store focus on the photo library. Zero Duplicates focuses on your files: the downloads, documents, PDFs, videos and audio files that pile up in the Files app and quietly fill your storage. Zero Duplicates compares files by their content, not by their names. A renamed download, an attachment saved twice, a document copied into three folders: all of them are found, even when the file names look nothing alike. MADE FOR THE FILES ON YOUR DEVICE • Scan any folder you choose: On My iPhone, iCloud Drive, external drives • Downloads from Safari, Mail and Messages • Documents: PDF, Word, Excel, Pages, Numbers, Keynote • Images, videos, audio recordings, archives and more • USB drives and SD cards (with adapter) CONTENT MATCHING File names lie. Zero Duplicates reads the actual content of every file, so duplicates are found even when they were renamed, moved or saved from different apps. AUTO-SELECT IN SECONDS Automatic selection keeps the newest or the oldest file in every duplicate group. Review, tap once, done. No scrolling through hundreds of files by hand. SEE BEFORE YOU DELETE Every duplicate can be previewed before deletion, and you choose which copy stays. At least one version of every file always remains, so losing all copies is impossible. Deletion is permanent, so nothing is removed without a clear confirmation first. PRIVATE BY DESIGN Scanning happens entirely on your device. Your files are never uploaded anywhere. HOW IT WORKS Pick a folder, scan, review what was found, delete with confidence. Three steps to a cleaner device. System files are protected automatically. Perfect for: • Anyone seeing "Storage Almost Full" warnings • People who download and share lots of files • Managing documents, media and work files on the go • Cleaning up iCloud Drive across devices TRY WITHOUT RISK Free to download • Unlimited scans • 500 MB free deletion Premium unlocks unlimited deletion and advanced features. Terms of Use: https://zeroduplicates.com/terms

About

Dupelganger

Features
Read full description

Find duplicate photos and videos in Apple Photos, plus identical documents in folders you choose. Choose what stays, review every removal, and clean up with an on-device scan. SEE WHAT MATCHES Verified duplicates are matched from their original file data. Possible duplicates and similar photos are labeled separately, so you know which groups need a closer look. Compare retakes and lookalikes without treating them as identical copies. CHOOSE WHAT STAYS Review one group at a time or compare up to 10 groups together. Each group marks a keeper. Tap a photo to inspect it, choose a different keeper, or keep everything. Batch review starts with nothing selected. Choose copies individually, or use Select verified copies to stage verified matches on the current page. Possible duplicates and similar photos remain yours to select. CONFIRM BEFORE REMOVING Review your selection and item count before removal. Apple Photos asks for your confirmation before selected photos or videos move to Recently Deleted. Scanning never deletes anything. FREE TO EXPLORE Scanning and viewing results are free. Your first 10 individual item removals are included, whether you remove them one at a time or together. This is one shared allowance across cleanup tools, not 10 groups or a recurring monthly limit. An optional one-time in-app purchase unlocks further removals. No subscription. Restore the purchase with the same Apple Account. PRIVATE ON YOUR IPHONE Photo matching, screenshot text recognition and document comparisons run on device. No account, ads or app analytics. We do not receive your photo library or documents. Apple's iCloud services and your chosen file providers follow your own settings. MORE WAYS TO SORT Find old screenshots and save their text as searchable cards. Spot large photos and videos, or use Shrink to create a smaller copy for comparison. Find identical documents in the Files folders you choose. Photos in Recently Deleted are recoverable for up to 30 days unless permanently removed sooner. Storage may not become available immediately. Document recovery depends on the file provider. Support: https://stackcurious.com/dupelganger/support Privacy: https://stackcurious.com/dupelganger/privacy Terms: https://stackcurious.com/dupelganger/terms

Screenshots

Zero Duplicates4 screens
Dupelganger4 screens

Verdict

The call

Zero Duplicates and Dupelganger are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Zero Duplicates sells 3 in-app purchases, starting at $1.99 per month and Dupelganger sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Zero Duplicates versus Dupelganger: the parameters behind the verdict, then further details
ParameterZero DuplicatesDupelganger
PriceFreeFree
Rating4.8 (63 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings63 — better—
Update frequencyWeekly—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size20 MB8 MB
Age rating4+4+
DeveloperChristopher BrockDave Oakley

In-app purchases

3 purchases

Zero Duplicates

Subscriptions2
  • Monthly Subscription$1.991 Month
  • Yearly Subscription$5.991 Year
One-time1
  • Lifetime$14.99
1 purchases

Dupelganger

One-time1
  • Unlimited Removals$9.99

Questions

Is Zero Duplicates free?
Zero Duplicates is free to download, with in-app purchases available.
Is Dupelganger free?
Dupelganger is free to download, with in-app purchases available.
Do Zero Duplicates or Dupelganger have ads?
Neither Zero Duplicates nor Dupelganger shows ads.

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