Comparison

Zero Duplicates vs NetToolBox

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

NetToolBox

Features
Read full description

NetToolBox ist eine professionelle Netzwerk- und IT-Toolbox für Administratoren, IT-Techniker, Netzwerkingenieure, Homelab-Nutzer, Studenten und Auszubildende. Die App funktioniert lokal ohne Registrierung und bündelt wichtige Werkzeuge für den technischen Alltag: • IPv4 Rechner • IPv6 Rechner • CIDR Rechner • Subnetzrechner • Broadcast- und Netzmaskenberechnung • DNS Lookup • Reverse DNS Lookup • Whois Lookup • Ping/Latenz Tool • Traceroute Plattformcheck • MAC Hersteller Lookup • Portdatenbank • WLAN Kanalübersicht • Binär/Dezimal/Hex Rechner • VLAN Planer • Netzwerknotizen • PDF Export • Favoriten • Helles und dunkles Design • Deutsch und Englisch Premium entfernt Werbung und schaltet professionelle Berichte und erweiterte Projektfunktionen frei.

Screenshots

Zero Duplicates4 screens
NetToolBox4 screens

Verdict

The call

The clearest difference is ads: Zero Duplicates at none against NetToolBox's shown. Zero Duplicates also leads on update cadence (weekly vs every 5 weeks) and iOS requirement (17.0 vs 26.5). On price, 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 $1.99 per month and NetToolBox 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, NetToolBox every 5 weeks. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

Scorecard3 real differences · 7 level
Zero Duplicates versus NetToolBox: the parameters behind the verdict, then further details
ParameterZero DuplicatesNetToolBox
PriceFreeFree
Rating4.9 (47 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings47 — better—
Update frequencyWeekly — betterEvery 5 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better26.5
Further details — not scored
Size15 MB7 MB
Age rating4+4+
DeveloperChristopher BrockArthur Hardy Kotsch

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

NetToolBox

One-time1
  • Werbefrei und Premium-Berichte$4.99

Questions

Is Zero Duplicates free?
Zero Duplicates is free to download, with in-app purchases available.
Is NetToolBox free?
NetToolBox is free to download, with in-app purchases available.
Do Zero Duplicates or NetToolBox have ads?
NetToolBox shows ads; Zero Duplicates does not.
Which is updated more often, Zero Duplicates or NetToolBox?
Zero Duplicates ships an update weekly, and NetToolBox every 5 weeks. Most recently, Zero Duplicates was updated on September 18, 2026 and NetToolBox on September 23, 2026.

Other comparisons