# Cleanup Duplicate Contacts! vs Calendar Sync App

The clearest difference is update cadence: Cleanup Duplicate Contacts! at every 2 months against Calendar Sync App's every 4 months. Calendar Sync App's advantage is iOS requirement (12.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Cleanup Duplicate Contacts! ships an update every 2 months, Calendar Sync App every 4 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Cleanup Duplicate Contacts! | Calendar Sync App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (8.7K ratings)](https://appshunter.io/ios/app/cleanup-duplicate-contacts/id513670485/reviews)** | — |
| Number of ratings | **8.7K** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | — |
| Size | 25 MB | 201 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Business Contacts Solutions, LLC](https://appshunter.io/developer/675697151) | [CiraApps Limited](https://appshunter.io/developer/1187220064) |

## What reviewers say

### Cleanup Duplicate Contacts!

[App page](https://appshunter.io/ios/app/cleanup-duplicate-contacts/id513670485)

This app automatically finds and merges duplicate contacts in your address book. It offers customizable matching levels and provides detailed reports. The app also suggests contact updates using AI and can capture new contacts from email signatures.

**Highlights:** Instant duplicate contact cleanup, Customizable merge levels, Automatic contact update suggestions, Email signature contact capture, Manages multiple contact sources, Backup and restore contacts

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Quick and efficient
- 👍 Easy to use
- 👍 Seamless operation
- 👍 Straightforward
- 👍 Effective

**What reviewers complain about**

- 🐛 Crashes
- 🐛 Deleted contacts
- 🐛 Unreliable
- 🐛 Didn't merge all duplicates
- 🔒 Privacy concerns about data sharing

**Reported bugs**

- Crashes during merging process
- Inconsistent behavior when re-merging contacts
- Deleting or losing contact information

**Requested features**

- Option to move contacts between groups
- Ability to select all backup contacts for deletion
- Improved backup and restore functionality


### Calendar Sync App

[App page](https://appshunter.io/ios/app/calendar-sync-app-view-and-edit/id1665590174)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cleanup Duplicate Contacts! free?

Cleanup Duplicate Contacts! is free to download, with no in-app purchases.

### Is Calendar Sync App free?

Calendar Sync App is free to download, with no in-app purchases.

### Do Cleanup Duplicate Contacts! or Calendar Sync App have ads?

Neither Cleanup Duplicate Contacts! nor Calendar Sync App shows ads.

### Which is updated more often, Cleanup Duplicate Contacts! or Calendar Sync App?

Cleanup Duplicate Contacts! ships an update every 2 months, and Calendar Sync App every 4 months. Most recently, Cleanup Duplicate Contacts! was updated on October 29, 2026 and Calendar Sync App on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*