Comparison

Conversion! vs Zero Duplicates

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

Head to head
About

Conversion!

Features
Read full description

Unit Converter – Fast, Accurate and Easy to Use Unit Converter is the perfect companion for quickly and accurately converting a wide variety of units. Whether you're at home, at work, in school, at university, or on the go, the app provides reliable results with an intuitive and easy-to-use interface. Features • Fast and precise unit conversions • Clean and intuitive user interface • Instant calculations while typing • Wide range of conversion categories • High calculation accuracy • Perfect for everyday use, education, engineering and professional work • Optimized for both iPhone and iPad • Simple, fast and efficient operation Available Categories Depending on the version, the app includes many conversion categories such as: • Length • Area • Volume • Weight • Speed • Temperature • Pressure • Energy • Power • Time • Angle • Digital Storage • Force • Density • Frequency • Currency and many more. Whether you need a quick conversion for everyday life or accurate engineering calculations, Unit Converter gives you reliable results in seconds.

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

Screenshots

Conversion!4 screens
Zero Duplicates4 screens

Verdict

The call

The clearest difference is in-app purchases: Conversion! at none against Zero Duplicates's 3. Zero Duplicates's advantage is update cadence (weekly vs every 20 months) and iOS requirement (17.0 vs 26.0). On price, ads 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. Conversion! asks for nothing beyond the download.

UpkeepUpdate frequency

Conversion! ships an update every 20 months, Zero Duplicates weekly. The most recent releases landed on September 20, 2026 and September 18, 2026 respectively.

Scorecard3 real differences · 7 level
Conversion! versus Zero Duplicates: the parameters behind the verdict, then further details
ParameterConversion!Zero Duplicates
PriceFreeFree
Rating—4.9 (47 ratings) — better
Positive reviews—66.7% of reviews
Number of ratings—47 — better
Update frequencyEvery 20 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.0 — better
Further details — not scored
Size15 MB15 MB
Age rating4+4+
DeveloperGerhard LentschikChristopher Brock

In-app purchases

None

Conversion!

No in-app purchases

3 purchases

Zero Duplicates

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

Questions

Is Conversion! free?
Conversion! is free to download, with no in-app purchases.
Is Zero Duplicates free?
Zero Duplicates is free to download, with in-app purchases available.
Do Conversion! or Zero Duplicates have ads?
Neither Conversion! nor Zero Duplicates shows ads.
Which is updated more often, Conversion! or Zero Duplicates?
Conversion! ships an update every 20 months, and Zero Duplicates weekly. Most recently, Conversion! was updated on September 20, 2026 and Zero Duplicates on September 18, 2026.

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