Contacts Duster vs The Wrong Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
The Wrong Calculator
This utility app challenges your brain by shuffling number positions after each input, forcing you to stay focused and break autopilot habits. It offers a unique way to perform calculations while engaging in cognitive exercise and mental workouts.
- Dynamic number shuffling
- Math games
- Intuitive interface
- Smooth animations
- Brain training benefits
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Challenge your brain with The Wrong Calculator - the only calculator that keeps you on your toes! Unlike traditional calculators, The Wrong Calculator shuffles number positions after each press, breaking your pattern recognition and forcing you to stay focused. This unique approach helps keep your brain sharp while performing everyday calculations. Perfect for: - Brain training and cognitive exercise - Breaking autopilot habits - Improving focus and attention - Daily mental workouts Features: - Dynamic number shuffling - Math Games - Clean, intuitive interface - Smooth animations - Brain training benefits Coming soon: Daily challenges, streak tracking, leaderboards, and custom themes! Stay sharp. Stay focused. Calculate differently.
Screenshots
Verdict
The clearest difference is review sentiment: The Wrong Calculator at 100% against Contacts Duster's 51%. The Wrong Calculator also leads on rating (5.0 vs 3.0) and in-app purchases (none vs 8). Contacts Duster's advantage is ratings volume (23 vs 2). On price, ads, device support and iOS requirement 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
Both are free to download. Contacts Duster sells 8 in-app purchases, starting at $2.99 per month. The Wrong Calculator asks for nothing beyond the download.
The Wrong Calculator holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Contacts Duster has 23 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 51% of Contacts Duster's written reviews are positive against 100% of The Wrong Calculator's.
Contacts Duster ships an update weekly, The Wrong Calculator every 2 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.
| Parameter | Contacts Duster | The Wrong Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (23 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 51.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 23 — better | 2 |
| Update frequency | Weekly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 11 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | MyClickapps.com LLC | Sameel Mawani |
Customer experience
Contacts Duster
The Wrong Calculator
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
The Wrong Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Contacts Duster
- Cloud Backup Monthly$2.991 Month
- Cloud Backup Yearly7 Days trial$19.991 Year
- Groups Manager$0.99
- Pro$0.99
- Auto Dust$1.99
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- Pro$2.99
- Pro upgrade$4.99
- Cloud Backup Lifetime$19.99
The Wrong Calculator
No in-app purchases
Questions
Is Contacts Duster free?
Is The Wrong Calculator free?
Which has better reviews, Contacts Duster or The Wrong Calculator?
Do Contacts Duster or The Wrong Calculator have ads?
Which is updated more often, Contacts Duster or The Wrong Calculator?
Other comparisons
