Comparison

Contacts Duster vs Calkillator

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

Head to head
About

Contacts Duster

This app helps you clean up your iPhone or iPad contacts by detecting and merging duplicate entries. It offers features to manage your address book efficiently, including cleaning 'zombies' and visualizing your contact data. Cloud backup is available via in-app purchase.

Highlights
  • Detect and merge duplicate contacts
  • Clean 'zombie' contacts
  • In-app backup and restore
  • Visualize address book with pie graph
  • Cloud backup of contacts
  • Localized in 12 languages
Features
Read full description

ContactsDuster is one of the original iPhone contacts cleanup apps, helping people dust messy address books since 2010. Redesigned in SwiftUI with a fresh Liquid Glass feel, ContactsDuster keeps contact cleanup simple: find duplicates, merge repeated people, remove empty zombie contacts, organize groups, and keep a backup ready when you need it. Why people use ContactsDuster: - Clean duplicate contacts quickly - Merge matching names, phone numbers, and email addresses - Remove empty or incomplete zombie contacts - Organize contact groups - Export contacts as vCard - Back up and restore with backup history in your iCloud account ContactsDuster works directly with your iPhone and iPad contacts. Your address book stays yours: contacts are not uploaded to us, and backup history is saved in your own iCloud account so we do not have access to it. Privacy Policy: https://www.myclickapps.com/privacy Terms of Use: https://www.myclickapps.com/terms

About

Calkillator

Features
Read full description

All calculator apps are the same? THAT'S NOT TRUE —! Meet Calkillator — the calculator that understands your voice. Instead of tapping buttons one by one, simply say what you want to calculate. "Subtract 3,500 from 20,000." That's it. No typing. No complicated formulas. Just speak, and Calkillator does the math instantly. Key Features • Voice Calculation — Calculate naturally using your voice in Korean, English, Japanese, Chinese, Spanish, and Thai. • Natural Currency Questions — Just ask, "How much is 1 dollar in Korean won?" and Calkillator understands and converts instantly — no typing, no separate converter screen. • 5 Everyday Tools — Percentage, tip calculator, unit converter, BMI calculator, and currency converter, all built in. Try them free for 7 days. • Scientific Calculator Mode — Go beyond basic calculations with trigonometric functions, logarithms, exponents, roots, constants, parentheses, and more. • Powerful Expression Engine — Supports addition, subtraction, multiplication, division, parentheses, operator precedence, and complex mathematical expressions. • Export & Share History — Save your calculation history as a text file or share it instantly. • Clean Dark UI — Fast, simple, and distraction-free design optimized for everyday use. • Privacy First — No ads. No tracking SDKs. No data sent to servers. Built to Keep Getting Better Calkillator's voice recognition will continue to evolve. We're continuously improving the voice recognition engine to better understand natural expressions, different speaking styles, and real-world calculation scenarios — including everyday currency questions like "How much is that in dollars?" The calculator you buy today will keep getting smarter. Calkillator Minions (In-App Purchase – $0.99) Unlock Voice Input and all 5 everyday tools — plus PRO features — with a single one-time purchase. Pay once. Use forever.

Screenshots

Contacts Duster4 screens
Calkillator4 screens

Verdict

The call

The clearest difference is update cadence: Contacts Duster at weekly against Calkillator'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. Contacts Duster sells 8 in-app purchases, starting at $2.99 per month and Calkillator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Contacts Duster ships an update weekly, Calkillator monthly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
Contacts Duster versus Calkillator: the parameters behind the verdict, then further details
ParameterContacts DusterCalkillator
PriceFreeFree
Rating3.0 (23 ratings) — better—
Positive reviews51.0% of reviews—
Number of ratings23 — better—
Update frequencyWeekly — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.6 — better
Further details — not scored
Size11 MB25 MB
Age rating4+4+
DeveloperMyClickapps.com LLC221B STUDIO

Bugs and requests

Contacts Duster

Reported bugs

4 issues
  • Crashes during contact cleaning
  • Deletes valid contacts
  • Fails to detect all duplicate contacts
  • Syncing issues with iCloud and other services

Requested features

4 requests
  • Allow merging of contact groups
  • Provide more granular control over contact management
  • Improve duplicate detection accuracy
  • Add support for more cloud storage services

Calkillator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Contacts Duster

Subscriptions2
  • Cloud Backup Monthly$2.991 Month
  • Cloud Backup Yearly7 Days trial$19.991 Year
One-time6
  • Groups Manager$0.99
  • Pro$0.99
  • Auto Dust$1.99
Show 3 more
  • Pro$2.99
  • Pro upgrade$4.99
  • Cloud Backup Lifetime$19.99
1 purchases

Calkillator

One-time1
  • Calkillator Minions$0.99

Questions

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

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