Comparison

Zero Duplicates vs Gonja

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

Gonja

Features
Read full description

See where your space went. Gonja turns any folder into a picture you can actually read. Large files and folders become large areas; small ones become small. One glance tells you what is taking the room, and a tap takes you inside it. Pick a folder in Files Choose any folder you can reach in Files: iCloud Drive, On My iPhone or iPad, a USB drive, or a server. Gonja reads nothing until you choose. Pin a folder as a favorite and scan it again later without the picker. A map you can explore The visual map sizes every rectangle in proportion to what it holds. Tap to select, tap again to zoom in, and follow the breadcrumbs back out. Long-press anything for its actions. Colour the map by category, by folder, by age, or by a plain monochrome scale; every category carries its own symbol too, so the map still reads if colour is hard to distinguish. Folders take the colour of what they mostly contain, so the first screen already shows where the video, photos, and archives are. A list when you want detail Switch to the list for every item's size, size on disk, share of the scan, and kind, with a bar that shows its share at a glance. On iPad the list becomes a full table with sortable columns. Search or filter instantly: filtering never re-reads your files. Honest numbers Two sizes are correct at the same time, and Gonja shows either: the apparent length of a file, or the space it actually occupies. Links are never followed. Files reachable under several names are counted once. Packages are measured all the way through but shown as single items. When a folder cannot be read, Gonja says so and reports what it skipped instead of pretending it measured everything. Gonja Pro One optional purchase for iPhone, iPad and Mac adds Changes (rescan a folder and see what grew and what shrank), Duplicates (files with identical contents, and which copies to move to the Trash), smart lists (large old files, installers, build folders, sparse disk images), Remove Download for iCloud Drive files, and Shortcuts. Each shows its total for free. Everything else is free. Nothing leaves your device No account, no analytics, no advertising, no tracking, and no connection to anything. Gonja reads only the folder you picked, and only file metadata, except when you ask it to find duplicates: then it compares files of the same size on your device and keeps nothing it read. Careful with your files Gonja cannot delete anything permanently. Moving items to the Trash always takes an explicit confirmation that lists every affected item by name and size. Where the location supports it, items go to Recently Deleted in Files; locations without a Trash are left untouched. Made for iPhone and iPad The inspector shows every detail of a selected item: as a sheet on iPhone, beside the map on iPad. Quick Look previews, Share, Show in Files, and Copy Path are a tap away. Export any scan as CSV or JSON. Light and Dark appearances, VoiceOver support, hardware keyboard shortcuts on iPad, and Reduce Motion, Increase Contrast, and Reduce Transparency all respected. Gonja does not clean, optimize, speed up, or diagnose your device. It measures, and it shows you what it measured.

Screenshots

Zero Duplicates4 screens
Gonja4 screens

Verdict

The call

The clearest difference is update cadence: Zero Duplicates at weekly against Gonja's monthly. On price, ads, in-app purchases and device support there is nothing between them.

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 $4.99 per month and Gonja sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Zero Duplicates ships an update weekly, Gonja monthly. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

Scorecard1 real difference · 9 level
Zero Duplicates versus Gonja: the parameters behind the verdict, then further details
ParameterZero DuplicatesGonja
PriceFreeFree
Rating4.8 (65 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings65 — better—
Update frequencyWeekly — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.0 — better18.0
Further details — not scored
Size20 MB7 MB
Age rating4+4+
DeveloperChristopher BrockParia Rastegar Jooybari

In-app purchases

3 purchases

Zero Duplicates

Subscriptions2
  • Monthly Subscription$4.991 Month
  • Yearly Subscription$7.991 Year
One-time1
  • Lifetime$14.99
1 purchases

Gonja

One-time1
  • Gonja Pro$9.99

Questions

Is Zero Duplicates free?
Zero Duplicates is free to download, with in-app purchases available.
Is Gonja free?
Gonja is free to download, with in-app purchases available.
Do Zero Duplicates or Gonja have ads?
Neither Zero Duplicates nor Gonja shows ads.
Which is updated more often, Zero Duplicates or Gonja?
Zero Duplicates ships an update weekly, and Gonja monthly. Most recently, Zero Duplicates was updated on November 5, 2026 and Gonja on November 6, 2026.

Other comparisons