# Cal Dedup — No more duplicate — Kill calendar duplicates fast

> Kill calendar duplicates fast (iPhone/iPad app by Zhihao Yang.)

- Source: https://appshunter.io/ios/app/cal-dedup-no-more-duplicate/id6759738516 (this page in markdown: same URL + `.md`)
- Developer: [Zhihao Yang](https://appshunter.io/developer/1466209376)
- Category: Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 28 MB
- Languages: English
- Released: 2026-03-04
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/cal-dedup-no-more-duplicate/id6759738516/reviews.md

## What is Cal Dedup?

Duplicate Remover is a professional calendar cleanup tool designed to quickly identify and remove duplicate events from your system calendar. Whether duplicates are caused by multi-device sync, calendar subscriptions, or data imports, this app helps you clean them up with one tap, making your calendar neat and organized again.

Key Features

Smart Scanning
- Automatically scans all events within a selected date range
- Identifies duplicates based on four dimensions: time, recurrence rules, content, and unique ID
- Supports scanning multiple calendar sources simultaneously

Flexible Selection
- Customize scan date ranges (Today, This Week, This Month, Custom, etc.)
- Select calendar sources to scan (iCloud, Gmail, Local, and more)
- Preview all discovered duplicate groups with smart recommendations

Safe Deletion
- Keeps one event per duplicate group, removes the rest
- Batch deletion for improved efficiency
- View details before executing deletion

History Tracking
- Records all deletion operations for easy tracking
- View statistics for each deletion batch
- Supports batch history management

Highlights
- Easy to Use: Intuitive interface, simple and clear operations
- Secure & Reliable: All data processed locally, never uploaded to servers
- Fast & Efficient: Scan in seconds, delete in one tap
- Multi-language: Supports Chinese, English, German, French, and Spanish
- Dark Mode: Supports system theme or manual toggle

Use Cases
- Duplicates created after multi-device synchronization
- Recurring events from calendar subscriptions
- Duplicates after importing data from other apps
- Regular calendar maintenance to keep it clean and organized

How to Use
1. Select calendars to scan
2. Set scan date range
3. Tap to start scanning
4. Review scan results and confirm items to delete
5. Execute deletion and complete cleanup

Privacy & Security
- All data processing happens locally on your device
- No collection or upload of personal data
- No account registration required, ready to use immediately

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| CalPurge Pro | $1.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-05-06

Bug fixes and performance improvements

### 1.0.0 — 2026-03-05

No release notes.

## More apps by Zhihao Yang

- [Cal2CSV — Calendar to CSV/ICS](https://appshunter.io/ios/app/cal2csv-calendar-to-csvics/id6757471749)
- [Cal Import - CSV/ICS Schedule](https://appshunter.io/ios/app/cal-import-csvics-schedule/id6758052713)
- [CalShift - Shift Work Calendar](https://appshunter.io/ios/app/calshift-shift-work-calendar/id6758676304)
- [TwinLens — Front & Back Camera](https://appshunter.io/ios/app/twinlens-front-and-back-camera/id6761839188)
- [Cal Master Pro — Calendar](https://appshunter.io/ios/app/cal-master-pro-calendar/id6770595605)

All apps by Zhihao Yang: https://appshunter.io/developer/1466209376

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-09.*